return err;
}
-#define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */
-
struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
unsigned long start, unsigned long end)
{
return __get_vm_area(size, flags, VMALLOC_START, VMALLOC_END);
}
-/**
- * remove_vm_area - find and remove a contingous kernel virtual area
- *
- * @addr: base address
- *
- * Search for the kernel VM area starting at @addr, and remove it.
- * This function returns the found VM area, but using it is NOT safe
- * on SMP machines.
- */
-struct vm_struct *remove_vm_area(void *addr)
+/* Caller must hold vmlist_lock */
+struct vm_struct *__remove_vm_area(void *addr)
{
struct vm_struct **p, *tmp;
- write_lock(&vmlist_lock);
for (p = &vmlist ; (tmp = *p) != NULL ;p = &tmp->next) {
if (tmp->addr == addr)
goto found;
}
- write_unlock(&vmlist_lock);
return NULL;
found:
unmap_vm_area(tmp);
*p = tmp->next;
- write_unlock(&vmlist_lock);
/*
* Remove the guard page.
return tmp;
}
+/**
+ * remove_vm_area - find and remove a contingous kernel virtual area
+ *
+ * @addr: base address
+ *
+ * Search for the kernel VM area starting at @addr, and remove it.
+ * This function returns the found VM area, but using it is NOT safe
+ * on SMP machines, except for its size or flags.
+ */
+struct vm_struct *remove_vm_area(void *addr)
+{
+ struct vm_struct *v;
+ write_lock(&vmlist_lock);
+ v = __remove_vm_area(addr);
+ write_unlock(&vmlist_lock);
+ return v;
+}
+
void __vunmap(void *addr, int deallocate_pages)
{
struct vm_struct *area;
* @addr: memory base address
*
* Free the virtually contiguous memory area starting at @addr, as
- * obtained from vmalloc(), vmalloc_32() or __vmalloc().
+ * obtained from vmalloc(), vmalloc_32() or __vmalloc(). If @addr is
+ * NULL, no operation is performed.
*
- * May not be called in interrupt context.
+ * Must not be called in interrupt context.
*/
void vfree(void *addr)
{
* Free the virtually contiguous memory area starting at @addr,
* which was created from the page array passed to vmap().
*
- * May not be called in interrupt context.
+ * Must not be called in interrupt context.
*/
void vunmap(void *addr)
{