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mm: neaten warn_alloc_failed

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Add __attribute__((format (printf...) to the function to validate format
and arguments.  Use vsprintf extension %pV to avoid any possible message
interleaving.  Coalesce format string.  Convert printks/pr_warning to
pr_warn.

[akpm@linux-foundation.org: use the __printf() macro]
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joe Perches 2011-10-31 17:08:35 -07:00 committed by Linus Torvalds
parent 06d5e032ad
commit 3ee9a4f086
3 changed files with 15 additions and 8 deletions
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3
include/linux/mm.h
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@ -1334,7 +1334,8 @@ extern void si_meminfo(struct sysinfo * val);
extern void si_meminfo_node(struct sysinfo *val, int nid);
extern int after_bootmem;
extern void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...);
extern __printf(3, 4)
void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...);
extern void setup_per_cpu_pageset(void);

16
mm/page_alloc.c
View file

@ -1754,7 +1754,6 @@ static DEFINE_RATELIMIT_STATE(nopage_rs,
void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...)
{
va_list args;
unsigned int filter = SHOW_MEM_FILTER_NODES;
if ((gfp_mask & __GFP_NOWARN) || !__ratelimit(&nopage_rs))
@ -1773,14 +1772,21 @@ void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...)
filter &= ~SHOW_MEM_FILTER_NODES;
if (fmt) {
printk(KERN_WARNING);
struct va_format vaf;
va_list args;
va_start(args, fmt);
vprintk(fmt, args);
vaf.fmt = fmt;
vaf.va = &args;
pr_warn("%pV", &vaf);
va_end(args);
}
pr_warning("%s: page allocation failure: order:%d, mode:0x%x\n",
current->comm, order, gfp_mask);
pr_warn("%s: page allocation failure: order:%d, mode:0x%x\n",
current->comm, order, gfp_mask);
dump_stack();
if (!should_suppress_show_mem())

4
mm/vmalloc.c
View file

@ -1593,8 +1593,8 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
return area->addr;
fail:
warn_alloc_failed(gfp_mask, order, "vmalloc: allocation failure, "
"allocated %ld of %ld bytes\n",
warn_alloc_failed(gfp_mask, order,
"vmalloc: allocation failure, allocated %ld of %ld bytes\n",
(area->nr_pages*PAGE_SIZE), area->size);
vfree(area->addr);
return NULL;