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[PATCH] pi-futex: introduce debug_check_no_locks_freed()

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Add debug_check_no_locks_freed(), as a central inline to add
bad-lock-free-debugging functionality to.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar 2006-06-27 02:54:49 -07:00 committed by Linus Torvalds
parent 6abdce7680
commit f9b8404cf8
4 changed files with 13 additions and 7 deletions
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4
arch/i386/mm/pageattr.c
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@ -229,8 +229,8 @@ void kernel_map_pages(struct page *page, int numpages, int enable)
if (PageHighMem(page)) if (PageHighMem(page))
return; return;
if (!enable) if (!enable)
mutex_debug_check_no_locks_freed(page_address(page), debug_check_no_locks_freed(page_address(page),
numpages * PAGE_SIZE); numpages * PAGE_SIZE);
/* the return value is ignored - the calls cannot fail, /* the return value is ignored - the calls cannot fail,
* large pages are disabled at boot time. * large pages are disabled at boot time.

10
include/linux/mm.h
View File

@ -1030,13 +1030,19 @@ static inline void vm_stat_account(struct mm_struct *mm,
} }
#endif /* CONFIG_PROC_FS */ #endif /* CONFIG_PROC_FS */
static inline void
debug_check_no_locks_freed(const void *from, unsigned long len)
{
mutex_debug_check_no_locks_freed(from, len);
}
#ifndef CONFIG_DEBUG_PAGEALLOC #ifndef CONFIG_DEBUG_PAGEALLOC
static inline void static inline void
kernel_map_pages(struct page *page, int numpages, int enable) kernel_map_pages(struct page *page, int numpages, int enable)
{ {
if (!PageHighMem(page) && !enable) if (!PageHighMem(page) && !enable)
mutex_debug_check_no_locks_freed(page_address(page), debug_check_no_locks_freed(page_address(page),
numpages * PAGE_SIZE); numpages * PAGE_SIZE);
} }
#endif #endif

4
mm/page_alloc.c
View File

@ -446,8 +446,8 @@ static void __free_pages_ok(struct page *page, unsigned int order)
arch_free_page(page, order); arch_free_page(page, order);
if (!PageHighMem(page)) if (!PageHighMem(page))
mutex_debug_check_no_locks_freed(page_address(page), debug_check_no_locks_freed(page_address(page),
PAGE_SIZE<<order); PAGE_SIZE<<order);
for (i = 0 ; i < (1 << order) ; ++i) for (i = 0 ; i < (1 << order) ; ++i)
reserved += free_pages_check(page + i); reserved += free_pages_check(page + i);

2
mm/slab.c
View File

@ -3397,7 +3397,7 @@ void kfree(const void *objp)
local_irq_save(flags); local_irq_save(flags);
kfree_debugcheck(objp); kfree_debugcheck(objp);
c = virt_to_cache(objp); c = virt_to_cache(objp);
mutex_debug_check_no_locks_freed(objp, obj_size(c)); debug_check_no_locks_freed(objp, obj_size(c));
__cache_free(c, (void *)objp); __cache_free(c, (void *)objp);
local_irq_restore(flags); local_irq_restore(flags);
} }