linux-2.6
16 years agox86, e820: remove end_user_pfn
Yinghai Lu [Sun, 13 Jul 2008 05:57:07 +0000 (22:57 -0700)] 
x86, e820: remove end_user_pfn

end_user_pfn used to modify the meaning of the e820 maps.

Now that all e820 operations are cleaned up, unified, tightened up,
the e820 map always get updated to reality, we don't need to keep
this secondary mechanism anymore.

If you hit this commit in bisection it means something slipped through.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: max_low_pfn_mapped fix, #3
Yinghai Lu [Sat, 12 Jul 2008 21:32:45 +0000 (14:32 -0700)] 
x86: max_low_pfn_mapped fix, #3

optimization: try to merge the range with same page size in
init_memory_mapping, to get the best possible linear mappings set up.

thus when GBpages is not there, we could do 2M pages.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: max_low_pfn_mapped fix, #2
Yinghai Lu [Sat, 12 Jul 2008 21:31:28 +0000 (14:31 -0700)] 
x86: max_low_pfn_mapped fix, #2

tighten the boundary checks around max_low_pfn_mapped - dont overmap
nor undermap into holes.

also print out tseg for AMD cpus, for diagnostic purposes.
(this is an SMM area, and we split up any big mappings around that area)

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: max_low_pfn_mapped fix, #1
Yinghai Lu [Sat, 12 Jul 2008 21:30:35 +0000 (14:30 -0700)] 
x86: max_low_pfn_mapped fix, #1

fix crash on Ingo's big box:

calling  pci_iommu_init+0x0/0x17
PCI-DMA: Disabling AGP.
PCI-DMA: aperture base @ d0000000 size 65536 KB
PCI-DMA: using GART IOMMU.
PCI-DMA: Reserving 64MB of IOMMU area in the AGP aperture
BUG: unable to handle kernel paging request at ffff88000003be88
IP: [<ffffffff8026d377>] __alloc_pages_internal+0xc3/0x3f2
PGD 202063 PUD 206063 PMD 22fc00163 PTE 3b162
Oops: 0000 [1] SMP

and e820 is:

 BIOS-e820: 0000000000000000 - 000000000009ac00 (usable)
 BIOS-e820: 000000000009ac00 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000ca000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 000000007ff70000 (usable)
 BIOS-e820: 000000007ff70000 - 000000007ff86000 (ACPI data)
 BIOS-e820: 000000007ff86000 - 0000000080000000 (ACPI NVS)
 BIOS-e820: 0000000080000000 - 00000000cfe00000 (usable)
 BIOS-e820: 00000000cfe00000 - 00000000d0000000 (reserved)
 BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
 BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved)
 BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
 BIOS-e820: 00000000fff80000 - 0000000100000000 (reserved)
 BIOS-e820: 0000000100000000 - 0000000830000000 (usable)

system has 32 GB RAM installed.

max_low_pfn_mapped is 0xcfe00, and GART aperture is not mapped.

So try to use init_memory_mapping to map that area, because the iommu
thinks that area is ram ...

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoMerge branch 'linus' into x86/core
Ingo Molnar [Sat, 12 Jul 2008 05:29:02 +0000 (07:29 +0200)] 
Merge branch 'linus' into x86/core

Conflicts:

arch/x86/mm/ioremap.c

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86_64: fix delayed signals
Roland McGrath [Thu, 10 Jul 2008 21:50:39 +0000 (14:50 -0700)] 
x86_64: fix delayed signals

On three of the several paths in entry_64.S that call
do_notify_resume() on the way back to user mode, we fail to properly
check again for newly-arrived work that requires another call to
do_notify_resume() before going to user mode.  These paths set the
mask to check only _TIF_NEED_RESCHED, but this is wrong.  The other
paths that lead to do_notify_resume() do this correctly already, and
entry_32.S does it correctly in all cases.

All paths back to user mode have to check all the _TIF_WORK_MASK
flags at the last possible stage, with interrupts disabled.
Otherwise, we miss any flags (TIF_SIGPENDING for example) that were
set any time after we entered do_notify_resume().  More work flags
can be set (or left set) synchronously inside do_notify_resume(), as
TIF_SIGPENDING can be, or asynchronously by interrupts or other CPUs
(which then send an asynchronous interrupt).

There are many different scenarios that could hit this bug, most of
them races.  The simplest one to demonstrate does not require any
race: when one signal has done handler setup at the check before
returning from a syscall, and there is another signal pending that
should be handled.  The second signal's handler should interrupt the
first signal handler before it actually starts (so the interrupted PC
is still at the handler's entry point).  Instead, it runs away until
the next kernel entry (next syscall, tick, etc).

This test behaves correctly on 32-bit kernels, and fails on 64-bit
(either 32-bit or 64-bit test binary).  With this fix, it works.

    #define _GNU_SOURCE
    #include <stdio.h>
    #include <signal.h>
    #include <string.h>
    #include <sys/ucontext.h>

    #ifndef REG_RIP
    #define REG_RIP REG_EIP
    #endif

    static sig_atomic_t hit1, hit2;

    static void
    handler (int sig, siginfo_t *info, void *ctx)
    {
      ucontext_t *uc = ctx;

      if ((void *) uc->uc_mcontext.gregs[REG_RIP] == &handler)
        {
          if (sig == SIGUSR1)
            hit1 = 1;
          else
            hit2 = 1;
        }

      printf ("%s at %#lx\n", strsignal (sig),
              uc->uc_mcontext.gregs[REG_RIP]);
    }

    int
    main (void)
    {
      struct sigaction sa;
      sigset_t set;

      sigemptyset (&sa.sa_mask);
      sa.sa_flags = SA_SIGINFO;
      sa.sa_sigaction = &handler;

      if (sigaction (SIGUSR1, &sa, NULL)
          || sigaction (SIGUSR2, &sa, NULL))
        return 2;

      sigemptyset (&set);
      sigaddset (&set, SIGUSR1);
      sigaddset (&set, SIGUSR2);
      if (sigprocmask (SIG_BLOCK, &set, NULL))
        return 3;

      printf ("main at %p, handler at %p\n", &main, &handler);

      raise (SIGUSR1);
      raise (SIGUSR2);

      if (sigprocmask (SIG_UNBLOCK, &set, NULL))
        return 4;

      if (hit1 + hit2 == 1)
        {
          puts ("PASS");
          return 0;
        }

      puts ("FAIL");
      return 1;
    }

Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: remove conflicting nx6325 and nx6125 quirks
Rafael J. Wysocki [Sat, 12 Jul 2008 00:50:15 +0000 (02:50 +0200)] 
x86: remove conflicting nx6325 and nx6125 quirks

We have two conflicting DMA-based quirks in there for the same set of
boxes (HP nx6325 and nx6125) and one of them actually breaks my box.

So remove the extra code.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: =?iso-8859-1?q?T=F6r=F6k_Edwin?= <edwintorok@gmail.com>
Cc: Vegard Nossum <vegard.nossum@gmail.com>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
Linus Torvalds [Sat, 12 Jul 2008 00:00:17 +0000 (17:00 -0700)] 
Merge git://git./linux/kernel/git/wim/linux-2.6-watchdog

* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
  [PATCH] IPMI: return correct value from ipmi_write

16 years ago[PATCH] IPMI: return correct value from ipmi_write
Mark Rustad [Thu, 10 Jul 2008 19:27:11 +0000 (14:27 -0500)] 
[PATCH] IPMI: return correct value from ipmi_write

This patch corrects the handling of write operations to the IPMI watchdog
to work as intended by returning the number of characters actually
processed. Without this patch, an "echo V >/dev/watchdog" enables the
watchdog if IPMI is providing the watchdog function.

Signed-off-by: Mark Rustad <MRustad@gmail.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
16 years agoMerge branch 'x86/generalize-visws' into x86/core
Ingo Molnar [Fri, 11 Jul 2008 19:22:18 +0000 (21:22 +0200)] 
Merge branch 'x86/generalize-visws' into x86/core

16 years agox86: Recover timer_ack lost in the merge of the NMI watchdog
Maciej W. Rozycki [Fri, 11 Jul 2008 18:47:15 +0000 (19:47 +0100)] 
x86: Recover timer_ack lost in the merge of the NMI watchdog

In the course of the recent unification of the NMI watchdog an assignment
to timer_ack to switch off unnecesary POLL commands to the 8259A in the
case of a watchdog failure has been accidentally removed.  The statement
used to be limited to the 32-bit variation as since the rewrite of the
timer code it has been relevant for the 82489DX only.  This change brings
it back.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: I/O APIC: Never configure IRQ2
Maciej W. Rozycki [Fri, 11 Jul 2008 18:35:23 +0000 (19:35 +0100)] 
x86: I/O APIC: Never configure IRQ2

There is no such entity as ISA IRQ2.  The ACPI spec does not make it
explicitly clear, but does not preclude it either -- all it says is ISA
legacy interrupts are identity mapped by default (subject to overrides),
but it does not state whether IRQ2 exists or not.  As a result if there is
no IRQ0 override, then IRQ2 is normally initialised as an ISA interrupt,
which implies an edge-triggered line, which is unmasked by default as this
is what we do for edge-triggered I/O APIC interrupts so as not to miss an
edge.

To the best of my knowledge it is useless, as IRQ2 has not been in use
since the PC/AT as back then it was taken by the 8259A cascade interrupt
to the slave, with the line position in the slot rerouted to newly-created
IRQ9.  No device could thus make use of this line with the pair of 8259A
chips.  Now in theory INTIN2 of the I/O APIC may be usable, but the
interrupt of the device wired to it would not be available in the PIC mode
at all, so I seriously doubt if anybody decided to reuse it for a regular
device.

However there are two common uses of INTIN2.  One is for IRQ0, with an
ACPI interrupt override (or its equivalent in the MP table).  But in this
case IRQ2 is gone entirely with INTIN0 left vacant.  The other one is for
an 8959A ExtINTA cascade.  In this case IRQ0 goes to INTIN0 and if ACPI is
used INTIN2 is assumed to be IRQ2 (there is no override and ACPI has no
way to report ExtINTA interrupts).  This is where a problem happens.

The problem is INTIN2 is configured as a native APIC interrupt, with a
vector assigned and the mask cleared.  And the line may indeed get active
and inject interrupts if the master 8959A has its timer interrupt enabled
(it might happen for other interrupts too, but they are normally masked in
the process of rerouting them to the I/O APIC).  There are two cases where
it will happen:

* When the I/O APIC NMI watchdog is enabled.  This is actually a misnomer
  as the watchdog pulses are delivered through the 8259A to the LINT0
  inputs of all the local APICs in the system.  The implication is the
  output of the master 8259A goes high and low repeatedly, signalling
  interrupts to INTIN2 which is enabled too!

  [The origin of the name is I think for a brief period during the
  development we had a capability in our code to configure the watchdog to
  use an I/O APIC input; that would be INTIN2 in this scenario.]

* When the native route of IRQ0 via INTIN0 fails for whatever reason -- as
  it happens with the system considered here.  In this scenario the timer
  pulse is delivered through the 8259A to LINT0 input of the local APIC of
  the bootstrap processor, quite similarly to how is done for the watchdog
  described above.  The result is, again, INTIN2 receives these pulses
  too.  Rafael's system used to escape this scenario, because an incorrect
  IRQ0 override would occupy INTIN2 and prevent it from being unmasked.

My conclusion is IRQ2 should be excluded from configuration in all the
cases and the current exception for ACPI systems should be lifted.  The
reason being the exception not only being useless, but harmful as well.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: L-APIC: Always fully configure IRQ0
Maciej W. Rozycki [Fri, 11 Jul 2008 18:35:17 +0000 (19:35 +0100)] 
x86: L-APIC: Always fully configure IRQ0

Unlike the 32-bit one, the 64-bit variation of the LVT0 setup code for
the "8259A Virtual Wire" through the local APIC timer configuration does
not fully configure the relevant irq_chip structure.  Instead it relies on
the preceding I/O APIC code to have set it up, which does not happen if
the I/O APIC variants have not been tried.

The patch includes corresponding changes to the 32-bit variation too
which make them both the same, barring a small syntactic difference
involving sequence of functions in the source.  That should work as an aid
with the upcoming merge.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: L-APIC: Set IRQ0 as edge-triggered
Maciej W. Rozycki [Fri, 11 Jul 2008 18:34:36 +0000 (19:34 +0100)] 
x86: L-APIC: Set IRQ0 as edge-triggered

 IRQ0 is edge-triggered, but the "8259A Virtual Wire" through the local
APIC configuration in the 32-bit version uses the "fasteoi" handler
suitable for level-triggered APIC interrupt.  Rewrite code so that the
"edge" handler is used.  The 64-bit version uses different code and is
unaffected.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: merge dwarf2 headers
Glauber Costa [Fri, 11 Jul 2008 15:36:52 +0000 (12:36 -0300)] 
x86: merge dwarf2 headers

Merge dwarf2_32.h and dwarf2_64.h into dwarf2.h.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: use AS_CFI instead of UNWIND_INFO
Glauber Costa [Thu, 10 Jul 2008 18:17:53 +0000 (15:17 -0300)] 
x86: use AS_CFI instead of UNWIND_INFO

In dwarf2_32.h, test for CONFIG_AS_CFI instead of
CONFIG_UNWIND_INFO. Turns out that searching for UNWIND_INFO
returns no match in any Kconfig or Makefile, so we're really
just throwing everything away regarding dwarf frames for i386.

The test that generates CONFIG_AS_CFI does not have anything
x86_64-specific, and right now, checking V=1 builds shows me
that the flags is there anyway, although unused.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: use ignore macro instead of hash comment
Glauber Costa [Thu, 10 Jul 2008 18:14:57 +0000 (15:14 -0300)] 
x86: use ignore macro instead of hash comment

In dwarf_64.h header, use the "ignore" macro the way
i386 does.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: use matching CFI_ENDPROC
Glauber Costa [Thu, 10 Jul 2008 18:09:20 +0000 (15:09 -0300)] 
x86: use matching CFI_ENDPROC

The RING0_INT_FRAME macro defines a CFI_STARTPROC.
So we should really be using CFI_ENDPROC after it.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoMerge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzi...
Linus Torvalds [Fri, 11 Jul 2008 18:37:55 +0000 (11:37 -0700)] 
Merge branch 'upstream-linus' of git://git./linux/kernel/git/jgarzik/libata-dev

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  libata-acpi: don't call sleeping function from invalid context
  Added Targa Visionary 1000 IDE adapter to pata_sis.c
  libata-acpi: filter out DIPM enable

16 years agoFix reference counting race on log buffers
Dave Chinner [Fri, 11 Jul 2008 07:43:55 +0000 (17:43 +1000)] 
Fix reference counting race on log buffers

When we release the iclog, we do an atomic_dec_and_lock to determine if
we are the last reference and need to trigger update of log headers and
writeout.  However, in xlog_state_get_iclog_space() we also need to
check if we have the last reference count there.  If we do, we release
the log buffer, otherwise we decrement the reference count.

But the compare and decrement in xlog_state_get_iclog_space() is not
atomic, so both places can see a reference count of 2 and neither will
release the iclog.  That leads to a filesystem hang.

Close the race by replacing the atomic_read() and atomic_dec() pair with
atomic_add_unless() to ensure that they are executed atomically.

Signed-off-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Tim Shimmin <tes@sgi.com>
Tested-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agox86: fix savesegment() bug causing crashes on 64-bit
Ingo Molnar [Fri, 11 Jul 2008 17:41:19 +0000 (19:41 +0200)] 
x86: fix savesegment() bug causing crashes on 64-bit

i spent a fair amount of time chasing a 64-bit bootup crash that manifested
itself as bootup segfaults:

  S10network[1825]: segfault at 7f3e2b5d16b8 ip 00000031108748c9 sp 00007fffb9c14c70 error 4 in libc-2.7.so[3110800000+14d000]

eventually causing init to die and panic the system:

  Kernel panic - not syncing: Attempted to kill init!
  Pid: 1, comm: init Not tainted 2.6.26-rc9-tip #13878

after a maratonic bisection session, the bad commit turned out to be:

b7675791859075418199c7af86a116ea34eaf5bd is first bad commit
| commit b7675791859075418199c7af86a116ea34eaf5bd
| Author: Jeremy Fitzhardinge <jeremy@goop.org>
| Date:   Wed Jun 25 00:19:00 2008 -0400
|
|     x86: remove open-coded save/load segment operations
|
|     This removes a pile of buggy open-coded implementations of savesegment
|     and loadsegment.

after some more bisection of this patch itself, it turns out that what
makes the difference are the savesegment() changes to __switch_to().

Taking a look at this portion of arch/x86/kernel/process_64.o revealed
this crutial difference:

| good:    99c:       8c e0                   mov    %fs,%eax
|          99e:       89 45 cc                mov    %eax,-0x34(%rbp)
|
| bad:     99c:       8c 65 cc                mov    %fs,-0x34(%rbp)

which is due to:

|                 unsigned fsindex;
| -               asm volatile("movl %%fs,%0" : "=r" (fsindex));
| +               savesegment(fs, fsindex);

savesegment() is implemented as:

 #define savesegment(seg, value)                                \
          asm("mov %%" #seg ",%0":"=rm" (value) : : "memory")

note the "m" modifier - it allows GCC to generate the segment move
into a memory operand as well.

But regarding segment operands there's a subtle detail in the x86
instruction set: the above 16-bit moves are zero-extend, but only
if it goes to a register.

If it goes to a memory operand, -0x34(%rbp) in the above case, there's
no zero-extend to 32-bit and the instruction will only save 16 bits
instead of the intended 32-bit.

The other 16 bits is random data - which can cause problems when that
value is used later on.

The solution is to only allow segment operands to go to registers.
This fix allows my test-system to boot up without crashing.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86_64: vdso32 cleanup using feature flags
Jeremy Fitzhardinge [Fri, 11 Jul 2008 01:13:36 +0000 (18:13 -0700)] 
x86_64: vdso32 cleanup using feature flags

Use the X86_FEATURE_SYSENTER32 to remove hard-coded CPU vendor check.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86_64: add pseudo-features for 32-bit compat syscall
Jeremy Fitzhardinge [Thu, 10 Jul 2008 23:22:56 +0000 (16:22 -0700)] 
x86_64: add pseudo-features for 32-bit compat syscall

Add pseudo-feature bits to describe whether the CPU supports sysenter
and/or syscall from ia32-compat userspace.  This removes a hardcoded
test in vdso32-setup.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agolibata-acpi: don't call sleeping function from invalid context
Zhang Rui [Fri, 11 Jul 2008 13:42:03 +0000 (09:42 -0400)] 
libata-acpi: don't call sleeping function from invalid context

The problem is introduced by commit
664d080c41463570b95717b5ad86e79dc1be0877.

acpi_evaluate_integer is a sleeping function,
and it should not be called with spin_lock_irqsave.
https://bugzilla.redhat.com/show_bug.cgi?id=451399

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
16 years agoAdded Targa Visionary 1000 IDE adapter to pata_sis.c
Kai Krakow [Sun, 6 Jul 2008 12:22:26 +0000 (14:22 +0200)] 
Added Targa Visionary 1000 IDE adapter to pata_sis.c

This enables short 40-wire detection for my laptop thus
enabling UDMA/100.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
16 years agolibata-acpi: filter out DIPM enable
Tejun Heo [Sun, 6 Jul 2008 14:15:03 +0000 (23:15 +0900)] 
libata-acpi: filter out DIPM enable

Some BIOSen enable DIPM via _GTF which causes command timeouts under
certain configuration.  This didn't occur on 2.6.25 because 2.6.25
defaulted to SRST, so _GTF wasn't executed during boot probe, so ahci
host reset disabled DIPM and as _GTF wasn't executed after SRST, DIPM
wasn't enabled.  On 2.6.26, hardreset is used during probe and after
probe _GTF is executed enabling DIPM and thus the failures.

This patch could theoretically disable DIPM on machines which used to
have it enabled on 2.6.25 but AFAIK ahci is currently the only driver
which uses SATA ACPI hierarchy (_SDD) and as the host reset would have
always disabled DIPM, this shouldn't happen.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
16 years agox86: fix tsc unification buglet with ftrace and stackprotector
Ingo Molnar [Fri, 11 Jul 2008 13:09:15 +0000 (15:09 +0200)] 
x86: fix tsc unification buglet with ftrace and stackprotector

Yinghai Lu reported crashes on 64-bit x86:

 BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
 IP: [<ffffffff80253b17>] hrtick_start_fair+0x89/0x173
 [...]

And with a long session of debugging and a lot of difficulty, tracked it down
to this commit:

 --------------->
 8fbbc4b45ce3e4c0eeb15004c79c72b6896a79c2 is first bad commit
 commit 8fbbc4b45ce3e4c0eeb15004c79c72b6896a79c2
 Author: Alok Kataria <akataria@vmware.com>
 Date:   Tue Jul 1 11:43:34 2008 -0700

     x86: merge tsc_init and clocksource code
 <--------------

The problem is that the TSC unification missed these Makefile rules
in arch/x86/kernel/Makefile:

  # Do not profile debug and lowlevel utilities
  CFLAGS_REMOVE_tsc_64.o = -pg
  CFLAGS_REMOVE_tsc_32.o = -pg
  ...
  CFLAGS_tsc_64.o         := $(nostackp)
  ...

which rules make sure that various instrumentation and debugging
facilities are disabled for code that might end up in a VDSO - such as
the TSC code.

Reported-and-bisected-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Conflicts:

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: introduce max_low_pfn_mapped for 64-bit
Yinghai Lu [Fri, 11 Jul 2008 03:38:26 +0000 (20:38 -0700)] 
x86: introduce max_low_pfn_mapped for 64-bit

when more than 4g memory is installed, don't map the big hole below 4g.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: reserve SLIT
Yinghai Lu [Fri, 11 Jul 2008 03:36:37 +0000 (20:36 -0700)] 
x86: reserve SLIT

save the SLIT, in case we are using fixmap to read it, and that fixmap
could be cleared by others.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: e820: user-defined memory maps: remove the range instead of update it to reserved
Yinghai Lu [Thu, 10 Jul 2008 11:17:00 +0000 (04:17 -0700)] 
x86: e820: user-defined memory maps: remove the range instead of update it to reserved

also let mem= to print out modified e820 map too

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Bernhard Walle <bwalle@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agortc: fix reported IRQ rate for when HPET is enabled
Paul Gortmaker [Fri, 11 Jul 2008 00:30:48 +0000 (17:30 -0700)] 
rtc: fix reported IRQ rate for when HPET is enabled

The IRQ rate reported back by the RTC is incorrect when HPET is enabled.

Newer hardware that has HPET to emulate the legacy RTC device gets this value
wrong since after it sets the rate, it returns before setting the variable
used to report the IRQ rate back to users of the device -- so the set rate and
the reported rate get out of sync.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Brownell <david-b@pacbell.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoFix name of Russell King in various comments
Uwe Kleine-König [Fri, 11 Jul 2008 00:30:46 +0000 (17:30 -0700)] 
Fix name of Russell King in various comments

This patch was created by

git grep -E -l 'Rus(el|s?e)l King' | xargs -r -t perl -p -i -e 's/Rus(el|s?e)l King/Russell King/g'

Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
Most-Definitely-Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agorapidio: fix device reference counting
Eugene Surovegin [Fri, 11 Jul 2008 00:30:44 +0000 (17:30 -0700)] 
rapidio: fix device reference counting

Fix RapidIO device reference counting.

Signed-of-by: Eugene Surovegin <ebs@ebshome.net>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agotpm: add Intel TPM TIS device HID
Marcin Obara [Fri, 11 Jul 2008 00:30:42 +0000 (17:30 -0700)] 
tpm: add Intel TPM TIS device HID

This patch adds Intel TPM TIS device HID:  ICO0102

Signed-off-by: Marcin Obara <marcin_obara@users.sourceforge.net>
Acked-by: Marcel Selhorst <tpm@selhorst.net>
Acked-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
Linus Torvalds [Fri, 11 Jul 2008 00:58:47 +0000 (17:58 -0700)] 
Merge git://git./linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (27 commits)
  tun: Persistent devices can get stuck in xoff state
  xfrm: Add a XFRM_STATE_AF_UNSPEC flag to xfrm_usersa_info
  ipv6: missed namespace context in ipv6_rthdr_rcv
  netlabel: netlink_unicast calls kfree_skb on error path by itself
  ipv4: fib_trie: Fix lookup error return
  tcp: correct kcalloc usage
  ip: sysctl documentation cleanup
  Documentation: clarify tcp_{r,w}mem sysctl docs
  netfilter: nf_nat_snmp_basic: fix a range check in NAT for SNMP
  netfilter: nf_conntrack_tcp: fix endless loop
  libertas: fix memory alignment problems on the blackfin
  zd1211rw: stop beacons on remove_interface
  rt2x00: Disable synchronization during initialization
  rc80211_pid: Fix fast_start parameter handling
  sctp: Add documentation for sctp sysctl variable
  ipv6: fix race between ipv6_del_addr and DAD timer
  irda: Fix netlink error path return value
  irda: New device ID for nsc-ircc
  irda: via-ircc proper dma freeing
  sctp: Mark the tsn as received after all allocations finish
  ...

16 years agotun: Persistent devices can get stuck in xoff state
Max Krasnyansky [Thu, 10 Jul 2008 23:59:11 +0000 (16:59 -0700)] 
tun: Persistent devices can get stuck in xoff state

The scenario goes like this. App stops reading from tun/tap.
TX queue gets full and driver does netif_stop_queue().
App closes fd and TX queue gets flushed as part of the cleanup.
Next time the app opens tun/tap and starts reading from it but
the xoff state is not cleared. We're stuck.
Normally xoff state is cleared when netdev is brought up. But
in the case of persistent devices this happens only during
initial setup.

The fix is trivial. If device is already up when an app opens
it we clear xoff state and that gets things moving again.

Signed-off-by: Max Krasnyansky <maxk@qualcomm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agoxfrm: Add a XFRM_STATE_AF_UNSPEC flag to xfrm_usersa_info
Steffen Klassert [Thu, 10 Jul 2008 23:55:37 +0000 (16:55 -0700)] 
xfrm: Add a XFRM_STATE_AF_UNSPEC flag to xfrm_usersa_info

Add a XFRM_STATE_AF_UNSPEC flag to handle the AF_UNSPEC behavior for
the selector family. Userspace applications can set this flag to leave
the selector family of the xfrm_state unspecified.  This can be used
to to handle inter family tunnels if the selector is not set from
userspace.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agoipv6: missed namespace context in ipv6_rthdr_rcv
Denis V. Lunev [Thu, 10 Jul 2008 23:54:50 +0000 (16:54 -0700)] 
ipv6: missed namespace context in ipv6_rthdr_rcv

Signed-off-by: Denis V. Lunev <den@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agonetlabel: netlink_unicast calls kfree_skb on error path by itself
Denis V. Lunev [Thu, 10 Jul 2008 23:53:39 +0000 (16:53 -0700)] 
netlabel: netlink_unicast calls kfree_skb on error path by itself

So, no need to kfree_skb here on the error path. In this case we can
simply return.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Acked-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agoipv4: fib_trie: Fix lookup error return
Ben Hutchings [Thu, 10 Jul 2008 23:52:52 +0000 (16:52 -0700)] 
ipv4: fib_trie: Fix lookup error return

In commit a07f5f508a4d9728c8e57d7f66294bf5b254ff7f "[IPV4] fib_trie: style
cleanup", the changes to check_leaf() and fn_trie_lookup() were wrong - where
fn_trie_lookup() would previously return a negative error value from
check_leaf(), it now returns 0.

Now fn_trie_lookup() doesn't appear to care about plen, so we can revert
check_leaf() to returning the error value.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Tested-by: William Boughton <bill@boughton.de>
Acked-by: Stephen Heminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agotcp: correct kcalloc usage
Milton Miller [Thu, 10 Jul 2008 23:51:32 +0000 (16:51 -0700)] 
tcp: correct kcalloc usage

kcalloc is supposed to be called with the count as its first argument and
the element size as the second.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agoip: sysctl documentation cleanup
Stephen Hemminger [Thu, 10 Jul 2008 23:50:26 +0000 (16:50 -0700)] 
ip: sysctl documentation cleanup

Reduced version of the spelling cleanup patch.

Take out the confusing language in tcp_frto, and organize the
undocumented values.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agoDocumentation: clarify tcp_{r,w}mem sysctl docs
J. Bruce Fields [Thu, 10 Jul 2008 23:47:41 +0000 (16:47 -0700)] 
Documentation: clarify tcp_{r,w}mem sysctl docs

Fix some of the defaults and attempt to clarify some language.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agoslub: Fix use-after-preempt of per-CPU data structure
Dmitry Adamushko [Thu, 10 Jul 2008 20:21:58 +0000 (22:21 +0200)] 
slub: Fix use-after-preempt of per-CPU data structure

Vegard Nossum reported a crash in kmem_cache_alloc():

BUG: unable to handle kernel paging request at da87d000
IP: [<c01991c7>] kmem_cache_alloc+0xc7/0xe0
*pde = 28180163 *pte = 1a87d160
Oops: 0002 [#1] PREEMPT SMP DEBUG_PAGEALLOC
Pid: 3850, comm: grep Not tainted (2.6.26-rc9-00059-gb190333 #5)
EIP: 0060:[<c01991c7>] EFLAGS: 00210203 CPU: 0
EIP is at kmem_cache_alloc+0xc7/0xe0
EAX: 00000000 EBX: da87c100 ECX: 1adad71a EDX: 6b6b6b6b
ESI: 00200282 EDI: da87d000 EBP: f60bfe74 ESP: f60bfe54
DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068

and analyzed it:

  "The register %ecx looks innocent but is very important here. The disassembly:

       mov    %edx,%ecx
       shr    $0x2,%ecx
       rep stos %eax,%es:(%edi) <-- the fault

   So %ecx has been loaded from %edx... which is 0x6b6b6b6b/POISON_FREE.
   (0x6b6b6b6b >> 2 == 0x1adadada.)

   %ecx is the counter for the memset, from here:

       memset(object, 0, c->objsize);

  i.e. %ecx was loaded from c->objsize, so "c" must have been freed.
  Where did "c" come from? Uh-oh...

       c = get_cpu_slab(s, smp_processor_id());

  This looks like it has very much to do with CPU hotplug/unplug. Is
  there a race between SLUB/hotplug since the CPU slab is used after it
  has been freed?"

Good analysis.

Yeah, it's possible that a caller of kmem_cache_alloc() -> slab_alloc()
can be migrated on another CPU right after local_irq_restore() and
before memset().  The inital cpu can become offline in the mean time (or
a migration is a consequence of the CPU going offline) so its
'kmem_cache_cpu' structure gets freed ( slab_cpuup_callback).

At some point of time the caller continues on another CPU having an
obsolete pointer...

Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Reported-by: Vegard Nossum <vegard.nossum@gmail.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoexec: fix stack excutability without PT_GNU_STACK
Hugh Dickins [Thu, 10 Jul 2008 20:19:20 +0000 (21:19 +0100)] 
exec: fix stack excutability without PT_GNU_STACK

Kernel Bugzilla #11063 points out that on some architectures (e.g. x86_32)
exec'ing an ELF without a PT_GNU_STACK program header should default to an
executable stack; but this got broken by the unlimited argv feature because
stack vma is now created before the right personality has been established:
so breaking old binaries using nested function trampolines.

Therefore re-evaluate VM_STACK_FLAGS in setup_arg_pages, where stack
vm_flags used to be set, before the mprotect_fixup.  Checking through
our existing VM_flags, none would have changed since insert_vm_struct:
so this seems safer than finding a way through the personality labyrinth.

Reported-by: pageexec@freemail.hu
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoMerge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfashe...
Linus Torvalds [Thu, 10 Jul 2008 20:11:01 +0000 (13:11 -0700)] 
Merge branch 'upstream-linus' of git://git./linux/kernel/git/mfasheh/ocfs2

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2:
  ocfs2: Fix flags in ocfs2_file_lock

16 years agox86: fix compile error in current tip.git
Jeremy Fitzhardinge [Thu, 10 Jul 2008 19:52:52 +0000 (12:52 -0700)] 
x86: fix compile error in current tip.git

Gas 2.15 complains about 32-bit registers being used in lea.

  AS      arch/x86/lib/copy_user_64.o
/local/scratch-2/jeremy/hg/xen/paravirt/linux/arch/x86/lib/copy_user_64.S: Assembler messages:
/local/scratch-2/jeremy/hg/xen/paravirt/linux/arch/x86/lib/copy_user_64.S:188: Error: `(%edx,%ecx,8)' is not a valid 64 bit base/index expression
/local/scratch-2/jeremy/hg/xen/paravirt/linux/arch/x86/lib/copy_user_64.S:257: Error: `(%edx,%ecx,8)' is not a valid 64 bit base/index expression
  AS      arch/x86/lib/copy_user_nocache_64.o
/local/scratch-2/jeremy/hg/xen/paravirt/linux/arch/x86/lib/copy_user_nocache_64.S: Assembler messages:
/local/scratch-2/jeremy/hg/xen/paravirt/linux/arch/x86/lib/copy_user_nocache_64.S:107: Error: `(%edx,%ecx,8)' is not a valid 64 bit base/index expression

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Vitaly Mayatskikh <v.mayatskih@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoMerge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Thu, 10 Jul 2008 19:34:55 +0000 (12:34 -0700)] 
Merge branch 'sched-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sched: fix cpu hotplug, cleanup
  sched: fix cpu hotplug

16 years agosched: fix cpu hotplug, cleanup
Linus Torvalds [Thu, 10 Jul 2008 18:25:03 +0000 (11:25 -0700)] 
sched: fix cpu hotplug, cleanup

Clean up __migrate_task(): to just have separate "done" and "fail"
cases, instead of that "out" case with random error behavior.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoMerge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 10 Jul 2008 18:19:53 +0000 (11:19 -0700)] 
Merge branch 'x86-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: fix /dev/mem compatibility under PAT

16 years agoFix PREEMPT_RCU without HOTPLUG_CPU
Nick Piggin [Thu, 10 Jul 2008 07:25:35 +0000 (17:25 +1000)] 
Fix PREEMPT_RCU without HOTPLUG_CPU

PREEMPT_RCU without HOTPLUG_CPU is broken.  The rcu_online_cpu is called
to initially populate rcu_cpu_online_map with all online CPUs when the
hotplug event handler is installed, and also to populate the map with
CPUs as they come online.  The former case is meant to happen with and
without HOTPLUG_CPU, but without HOTPLUG_CPU, the rcu_offline_cpu
function is no-oped -- while it still gets called, it does not set the
rcu CPU map.

With a blank RCU CPU map, grace periods get to tick by completely
oblivious to active RCU read side critical sections.  This results in
free-before-grace bugs.

Fix is obvious once the problem is known. (Also, change __devinit to
__cpuinit so the function gets thrown away on !HOTPLUG_CPU kernels).

Signed-off-by: Nick Piggin <npiggin@suse.de>
Reported-and-tested-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
[ Nick is my personal hero of the day - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agox86, VisWS: fix pci_direct_conf1 dependency
Ingo Molnar [Thu, 10 Jul 2008 18:06:30 +0000 (20:06 +0200)] 
x86, VisWS: fix pci_direct_conf1 dependency

fix:

 arch/x86/pci/built-in.o: In function `pci_subsys_init':
 visws.c:(.init.text+0xfc5): undefined reference to `pci_direct_conf1'

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: build fix
Ingo Molnar [Thu, 10 Jul 2008 17:47:49 +0000 (19:47 +0200)] 
x86, VisWS: build fix

fix:

 arch/x86/kernel/built-in.o: In function `visws_early_detect':
 : undefined reference to `mach_get_smp_config_quirk'
 arch/x86/kernel/built-in.o: In function `visws_early_detect':
 : undefined reference to `mach_find_smp_config_quirk'

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: remove duplicate call to use_tsc_delay
Glauber Costa [Thu, 10 Jul 2008 17:01:47 +0000 (14:01 -0300)] 
x86: remove duplicate call to use_tsc_delay

Integration generated a duplicate call to use_tsc_delay.
Particularly, the one that is done before we check for general
tsc usability seems wrong.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: build fix
Ingo Molnar [Thu, 10 Jul 2008 17:39:55 +0000 (19:39 +0200)] 
x86, VisWS: build fix

fix:

arch/x86/kernel/visws_quirks.c: In function ‘visws_early_detect’:
arch/x86/kernel/visws_quirks.c:293: error: ‘no_broadcast’ undeclared (first use in this function)
arch/x86/kernel/visws_quirks.c:293: error: (Each undeclared identifier is reported only once
arch/x86/kernel/visws_quirks.c:293: error: for each function it appears in.)
make[1]: *** [arch/x86/kernel/visws_quirks.o] Error 1
make: *** [arch/x86/kernel/visws_quirks.o] Error 2

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: do not allow VisWS for Voyager
Ingo Molnar [Thu, 10 Jul 2008 17:37:44 +0000 (19:37 +0200)] 
x86, VisWS: do not allow VisWS for Voyager

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, update include file change
Ingo Molnar [Thu, 10 Jul 2008 17:35:33 +0000 (19:35 +0200)] 
x86, VisWS: turn into generic arch, update include file change

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86/pci: fix warnings in subsys_initcall functions
Robert Richter [Thu, 10 Jul 2008 16:58:25 +0000 (18:58 +0200)] 
x86/pci: fix warnings in subsys_initcall functions

Signed-off-by: Robert Richter <robert.richter@amd.com>
Cc: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86/pci merge: fixing numaq initialization
Robert Richter [Thu, 10 Jul 2008 16:58:24 +0000 (18:58 +0200)] 
x86/pci merge: fixing numaq initialization

Patch d49c4288 (tip/x86/mpparse) introduced some changes in calling
subsys_init calls if CONFIG_X86_NUMAQ option is set. This patch
updates subsystem initalization according to this changes.

Signed-off-by: Robert Richter <robert.richter@amd.com>
Cc: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoftrace: Documentation
Steven Rostedt [Thu, 10 Jul 2008 16:46:01 +0000 (12:46 -0400)] 
ftrace: Documentation

This is the long awaited ftrace.txt. It explains in quite detail how to
use ftrace and the various tracers.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoarch/x86/kernel/.gitignore: Added vmlinux.lds to .gitignore file because it shouldn...
Daniel Guilak [Thu, 10 Jul 2008 16:39:32 +0000 (09:39 -0700)] 
arch/x86/kernel/.gitignore: Added vmlinux.lds to .gitignore file because it shouldn't be tracked.

Signed-off-by: Daniel Guilak <daniel@danielguilak.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agokernel/kprobes.c: Made kprobe_blacklist static.
Daniel Guilak [Thu, 10 Jul 2008 16:38:19 +0000 (09:38 -0700)] 
kernel/kprobes.c: Made kprobe_blacklist static.

Signed-off-by: Daniel Guilak <daniel@danielguilak.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Thu, 10 Jul 2008 17:10:02 +0000 (10:10 -0700)] 
Merge git://git./linux/kernel/git/herbert/crypto-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: chainiv - Invoke completion function

16 years agox86, VisWS: turn into generic arch, eliminate Kconfig specials
Ingo Molnar [Thu, 10 Jul 2008 15:02:10 +0000 (17:02 +0200)] 
x86, VisWS: turn into generic arch, eliminate Kconfig specials

remove leftover traces of various VISWS related Kconfig specials.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, remove leftover files
Ingo Molnar [Thu, 10 Jul 2008 14:45:50 +0000 (16:45 +0200)] 
x86, VisWS: turn into generic arch, remove leftover files

remove leftover arch/x86/mach-visws/* files.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, clean up
Ingo Molnar [Thu, 10 Jul 2008 14:21:38 +0000 (16:21 +0200)] 
x86, VisWS: turn into generic arch, clean up

merge traps_visws.c and apic_visws.c into visws_quirks.c.

(no code changed)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, clean up
Ingo Molnar [Thu, 10 Jul 2008 14:20:32 +0000 (16:20 +0200)] 
x86, VisWS: turn into generic arch, clean up

rename setup_visws.c to visws_quirks.c.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, IO-APIC setup fix
Ingo Molnar [Thu, 10 Jul 2008 14:14:56 +0000 (16:14 +0200)] 
x86, VisWS: turn into generic arch, IO-APIC setup fix

skip IO-APIC setup on a VISWS if it's enabled.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, clean up
Ingo Molnar [Thu, 10 Jul 2008 14:09:50 +0000 (16:09 +0200)] 
x86, VisWS: turn into generic arch, clean up

remove VISWS Kconfig complications, now that it's supported by the generic
architecture.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, flip over VISWS to generic arch
Ingo Molnar [Thu, 10 Jul 2008 13:55:27 +0000 (15:55 +0200)] 
x86, VisWS: turn into generic arch, flip over VISWS to generic arch

this is the big move: flip over VISWS to generic arch support.

From this commit on CONFIG_X86_VISWS is just another (default-disabled)
option that turns on certain quirks - no other complications.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, copy visws files
Ingo Molnar [Thu, 10 Jul 2008 13:50:37 +0000 (15:50 +0200)] 
x86, VisWS: turn into generic arch, copy visws files

copy arch/x86/mach-visws/setup_visws.c, apic_visws.c and traps_visws.c
files to arch/x86/kernel/, in preparation of the switchover to a
non-subarch setup for VISWS.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, add early quirks to default architectures
Ingo Molnar [Thu, 10 Jul 2008 13:48:48 +0000 (15:48 +0200)] 
x86, VisWS: turn into generic arch, add early quirks to default architectures

add early quirk support to the generic architecture code.

this allows VISWS to be supported by the generic code and allows us
to remove the VISWS subarch.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, add NR_IRQS quirk
Ingo Molnar [Thu, 10 Jul 2008 13:42:50 +0000 (15:42 +0200)] 
x86, VisWS: turn into generic arch, add NR_IRQS quirk

NR_IRQS: let VISWS be just a sub-case of the generic code.

This can create a somewhat larger irq_desc[] array if NR_CPUS is high
but that should not worry VisWS which has 4 CPUs at most.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, eliminate include/asm-x86/mach-visws/setup_arch.h
Ingo Molnar [Thu, 10 Jul 2008 13:33:49 +0000 (15:33 +0200)] 
x86, VisWS: turn into generic arch, eliminate include/asm-x86/mach-visws/setup_arch.h

use the generic version of setup_arch.h - it's the same.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, move definitions
Ingo Molnar [Thu, 10 Jul 2008 13:31:35 +0000 (15:31 +0200)] 
x86, VisWS: turn into generic arch, move definitions

move the SGIVW definitions from setup_arch.h into its own header file.

preparation for turning VISWS into a generic PC architecture.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, create include/asm-x86/visws/
Ingo Molnar [Thu, 10 Jul 2008 13:25:21 +0000 (15:25 +0200)] 
x86, VisWS: turn into generic arch, create include/asm-x86/visws/

move the include/asm-x86/mach-visws/ VISWS specific hardware
details include files into include/asm-x86/visws, to be used from
generic code.

No code changed.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, eliminate asm-x86/mach-visws/mach_apicdef.h
Ingo Molnar [Thu, 10 Jul 2008 13:13:41 +0000 (15:13 +0200)] 
x86, VisWS: turn into generic arch, eliminate asm-x86/mach-visws/mach_apicdef.h

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, update asm-x86/mach-visws/mach_apicdef.h
Ingo Molnar [Thu, 10 Jul 2008 13:12:05 +0000 (15:12 +0200)] 
x86, VisWS: turn into generic arch, update asm-x86/mach-visws/mach_apicdef.h

update asm-x86/mach-visws/mach_apicdef.h to the generic version.

This should work fine as VISWS has a standard local APIC and thus
its mach_apicdef.h copy is just an ancient version of the generic code.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, eliminate include/asm-x86/mach-visws/smpboot_hooks.h
Ingo Molnar [Thu, 10 Jul 2008 13:10:29 +0000 (15:10 +0200)] 
x86, VisWS: turn into generic arch, eliminate include/asm-x86/mach-visws/smpboot_hooks.h

now that include/asm-x86/mach-visws/smpboot_hooks.h equals
to the default file in ../mach-default/smpboot_hooks.h, simply
include it instead of maintaining a copy.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, update include/asm-x86/mach-visws/smpboot_hooks.h
Ingo Molnar [Thu, 10 Jul 2008 13:06:07 +0000 (15:06 +0200)] 
x86, VisWS: turn into generic arch, update include/asm-x86/mach-visws/smpboot_hooks.h

update include/asm-x86/mach-visws/smpboot_hooks.h to
include/asm-x86/mach-default/smpboot_hooks.h (the generic version).

this _should_ work, because VISWS sets skip_ioapic_setup, but it
should be tested on a real VISWS to make sure.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, enhance include/asm-x86/mach-default/smpboot_hooks.h
Ingo Molnar [Thu, 10 Jul 2008 13:09:04 +0000 (15:09 +0200)] 
x86, VisWS: turn into generic arch, enhance include/asm-x86/mach-default/smpboot_hooks.h

Allow the generic smpboot quirks code to be built with
ONFIG_X86_IO_APIC disabled. This way VISWS will be able
to use it as-is.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, eliminate include/asm-x86/mach-visws/mach_apic.h
Ingo Molnar [Thu, 10 Jul 2008 13:04:13 +0000 (15:04 +0200)] 
x86, VisWS: turn into generic arch, eliminate include/asm-x86/mach-visws/mach_apic.h

now that include/asm-x86/mach-visws/mach_apic.h equals
to include/asm-x86/mach-default/mach_apic.h, simply start
using the generic one.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, update asm-x86/mach-visws/mach_apic.h
Ingo Molnar [Thu, 10 Jul 2008 13:01:54 +0000 (15:01 +0200)] 
x86, VisWS: turn into generic arch, update asm-x86/mach-visws/mach_apic.h

update asm-x86/mach-visws/mach_apic.h to the generic version.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, install proper PCI quirk
Ingo Molnar [Thu, 10 Jul 2008 14:53:21 +0000 (16:53 +0200)] 
x86, VisWS: turn into generic arch, install proper PCI quirk

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, use generic mpparse code
Ingo Molnar [Thu, 10 Jul 2008 12:42:03 +0000 (14:42 +0200)] 
x86, VisWS: turn into generic arch, use generic mpparse code

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, add early init quirks
Ingo Molnar [Thu, 10 Jul 2008 11:31:04 +0000 (13:31 +0200)] 
x86, VisWS: turn into generic arch, add early init quirks

add early init quirks for VisWS. This gradually turns the VISWS subarch
into a generic PC architecture.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, VisWS: turn into generic arch, make VisWS boot on a regular PC
Ingo Molnar [Thu, 10 Jul 2008 14:29:28 +0000 (16:29 +0200)] 
x86, VisWS: turn into generic arch, make VisWS boot on a regular PC

first step: make the VISWS subarch boot on a regular PC.

We take various shortcuts for that. We copy the generic arch setup file over
into the VISWS setup file.

This is the only step that is not expected to boot on a real VISWS.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: add early quirk support
Ingo Molnar [Thu, 10 Jul 2008 15:30:40 +0000 (17:30 +0200)] 
x86: add early quirk support

Add early quirks support.

In preparation of enabling the generic architecture to boot on a VISWS.

This will allow us to remove the VISWS subarch and all its complications.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoMerge branch 'x86/core' into x86/generalize-visws
Ingo Molnar [Thu, 10 Jul 2008 16:55:17 +0000 (18:55 +0200)] 
Merge branch 'x86/core' into x86/generalize-visws

16 years agoMerge branch 'for-2.6.26' of git://neil.brown.name/md
Linus Torvalds [Thu, 10 Jul 2008 16:49:46 +0000 (09:49 -0700)] 
Merge branch 'for-2.6.26' of git://neil.brown.name/md

* 'for-2.6.26' of git://neil.brown.name/md:
  md: ensure all blocks are uptodate or locked when syncing

16 years agoMerge branch 'x86/unify-pci' into x86/core
Ingo Molnar [Thu, 10 Jul 2008 16:47:29 +0000 (18:47 +0200)] 
Merge branch 'x86/unify-pci' into x86/core

16 years agoocfs2: Fix flags in ocfs2_file_lock
Mark Fasheh [Thu, 10 Jul 2008 16:25:39 +0000 (09:25 -0700)] 
ocfs2: Fix flags in ocfs2_file_lock

The stack-glue merge changed the way we use flags in dlmglue in that we now
use the fs/dlm equivalents. Unfortunately, a merge error left the new flock
code only partially updated. This took a while to show up though, because
the lock level constants are actually identical between o2dlm and fs/dlm.
The *_CONVERT and *_NOQUEUE flags have different values though, which is
eventually causing a crash in flags_to_o2dlm().

Signed-off-by: Mark Fasheh <mfasheh@suse.com>
16 years agocrypto: chainiv - Invoke completion function
Herbert Xu [Thu, 10 Jul 2008 09:42:36 +0000 (17:42 +0800)] 
crypto: chainiv - Invoke completion function

When chainiv postpones requests it never calls their completion functions.
This causes symptoms such as memory leaks when IPsec is in use.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
16 years agox86: fix visws and vsmp build
Ingo Molnar [Thu, 10 Jul 2008 10:21:58 +0000 (12:21 +0200)] 
x86: fix visws and vsmp build

these two sub-architectures want PCI to be default-on, not default-off.

Reported-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: I/O APIC: Add a 64-bit variation of replace_pin_at_irq()
Maciej W. Rozycki [Tue, 1 Jul 2008 00:19:31 +0000 (01:19 +0100)] 
x86: I/O APIC: Add a 64-bit variation of replace_pin_at_irq()

When an interrupt is rerouted to a different I/O APIC pin the relevant
entry of the irq_2_pin list should get updated accordingly so that
operations are performed on the correct redirection entry.

This is already done by the 32-bit variation of the code and here is a
complementing 64-bit implementation.  Should make someone's decision less
tough when merging the two. ;)

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoRevert "x86: fix IO APIC breakage on HP nx6325"
Ingo Molnar [Thu, 10 Jul 2008 09:00:50 +0000 (11:00 +0200)] 
Revert "x86: fix IO APIC breakage on HP nx6325"

This reverts commit 90221a61a71b7ad659d8741cf1e404506b174982.

This too was just temporary diagnostics - not needed now that we've
got the final fix via:

| commit e2079c43861f71b2deb78ee20e247ad954fdd67e
| Author: Rafael J. Wysocki <rjw@sisk.pl>
| Date:   Tue Jul 8 16:12:26 2008 +0200
|
|     x86: fix C1E && nx6325 stability problem

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoRevert "x86: fix IO APIC breakage on HP nx6325, v2"
Ingo Molnar [Thu, 10 Jul 2008 08:59:59 +0000 (10:59 +0200)] 
Revert "x86: fix IO APIC breakage on HP nx6325, v2"

This reverts commit a74a1cc3df0be89658bc735c8aed80c8392e2c15.

This was just temporary diagnostics commit - not needed now that we've
got the final fix.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, AMD IOMMU: clean up Kconfig entry
FUJITA Tomonori [Thu, 10 Jul 2008 00:50:50 +0000 (09:50 +0900)] 
x86, AMD IOMMU: clean up Kconfig entry

AMD_IOMMU should depend on IOMMU_HELPER since they are the IOMMU
helper functions. SWIOTLB requires IOMMU_HELPER so declaring that
AMD_IOMMU depends on SWIOTLB properly fixes the problems.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: clean up iommu.h and gart.h
FUJITA Tomonori [Wed, 9 Jul 2008 23:27:49 +0000 (08:27 +0900)] 
x86: clean up iommu.h and gart.h

This remove lots of duplications in iommu.h and gart.h.

The end result of this patch is:

- iommu.h is a header file for everyone related with IOMMUs.

- gart.h is the private header file. Only pci-gart_64.c and its friends
  include it.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: fujita.tomonori@lab.ntt.co.jp
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoMerge branch 'x86/gart' into x86/core
Ingo Molnar [Thu, 10 Jul 2008 08:43:11 +0000 (10:43 +0200)] 
Merge branch 'x86/gart' into x86/core