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[PATCH] __vmalloc with GFP_ATOMIC causes 'sleeping from invalid context' 

If __vmalloc is called to allocate memory with GFP_ATOMIC in atomic
context, the chain of calls results in __get_vm_area_node allocating memory
for vm_struct with GFP_KERNEL, causing the 'sleeping from invalid context'
warning.  This patch fixes it by passing the gfp flags along so
__get_vm_area_node allocates memory for vm_struct with the same flags.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Giridhar Pemmasani 2006-10-28 10:38:34 -07:00 committed by Linus Torvalds
parent 6a2aae06cc
commit 52fd24ca1d
2 changed files with 13 additions and 8 deletions
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3
include/linux/vmalloc.h
View File

@ -60,7 +60,8 @@ extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
unsigned long start, unsigned long end);
extern struct vm_struct *get_vm_area_node(unsigned long size,
unsigned long flags, int node);
unsigned long flags, int node,
gfp_t gfp_mask);
extern struct vm_struct *remove_vm_area(void *addr);
extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
struct page ***pages);

18
mm/vmalloc.c
View File

@ -160,13 +160,15 @@ int map_vm_area(struct vm_struct *area, pgprot_t prot, struct page ***pages)
return err;
}
struct vm_struct *__get_vm_area_node(unsigned long size, unsigned long flags,
unsigned long start, unsigned long end, int node)
static struct vm_struct *__get_vm_area_node(unsigned long size, unsigned long flags,
unsigned long start, unsigned long end,
int node, gfp_t gfp_mask)
{
struct vm_struct **p, *tmp, *area;
unsigned long align = 1;
unsigned long addr;
BUG_ON(in_interrupt());
if (flags & VM_IOREMAP) {
int bit = fls(size);
@ -180,7 +182,7 @@ struct vm_struct *__get_vm_area_node(unsigned long size, unsigned long flags,
addr = ALIGN(start, align);
size = PAGE_ALIGN(size);
area = kmalloc_node(sizeof(*area), GFP_KERNEL, node);
area = kmalloc_node(sizeof(*area), gfp_mask, node);
if (unlikely(!area))
return NULL;
@ -236,7 +238,7 @@ struct vm_struct *__get_vm_area_node(unsigned long size, unsigned long flags,
struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
unsigned long start, unsigned long end)
{
return __get_vm_area_node(size, flags, start, end, -1);
return __get_vm_area_node(size, flags, start, end, -1, GFP_KERNEL);
}
/**
@ -253,9 +255,11 @@ struct vm_struct *get_vm_area(unsigned long size, unsigned long flags)
return __get_vm_area(size, flags, VMALLOC_START, VMALLOC_END);
}
struct vm_struct *get_vm_area_node(unsigned long size, unsigned long flags, int node)
struct vm_struct *get_vm_area_node(unsigned long size, unsigned long flags,
int node, gfp_t gfp_mask)
{
return __get_vm_area_node(size, flags, VMALLOC_START, VMALLOC_END, node);
return __get_vm_area_node(size, flags, VMALLOC_START, VMALLOC_END, node,
gfp_mask);
}
/* Caller must hold vmlist_lock */
@ -487,7 +491,7 @@ static void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot,
if (!size || (size >> PAGE_SHIFT) > num_physpages)
return NULL;
area = get_vm_area_node(size, VM_ALLOC, node);
area = get_vm_area_node(size, VM_ALLOC, node, gfp_mask);
if (!area)
return NULL;