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Commit f9b8404c authored by Ingo Molnar's avatar Ingo Molnar Committed by Linus Torvalds
Browse files

[PATCH] pi-futex: introduce debug_check_no_locks_freed() 



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

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarArjan van de Ven <arjan@linux.intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 6abdce76

arch/i386/mm/pageattr.c

+2 −2
Original line number Diff line number Diff line
@@ -229,7 +229,7 @@ void kernel_map_pages(struct page *page, int numpages, int enable) 
	if (PageHighMem(page))

		return;

	if (!enable)

		mutex_debug_check_no_locks_freed(page_address(page),

		debug_check_no_locks_freed(page_address(page),

					   numpages * PAGE_SIZE);



	/* the return value is ignored - the calls cannot fail,

include/linux/mm.h

+8 −2
Original line number Diff line number Diff line
@@ -1030,12 +1030,18 @@ static inline void vm_stat_account(struct mm_struct *mm, 
}

#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

static inline void

kernel_map_pages(struct page *page, int numpages, int 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);

}

#endif

mm/page_alloc.c

+2 −2
Original line number Diff line number Diff line
@@ -446,7 +446,7 @@ static void __free_pages_ok(struct page *page, unsigned int order) 


	arch_free_page(page, order);

	if (!PageHighMem(page))

		mutex_debug_check_no_locks_freed(page_address(page),

		debug_check_no_locks_freed(page_address(page),

					   PAGE_SIZE<<order);



	for (i = 0 ; i < (1 << order) ; ++i)

mm/slab.c

+1 −1
Original line number Diff line number Diff line
@@ -3397,7 +3397,7 @@ void kfree(const void *objp) 
	local_irq_save(flags);

	kfree_debugcheck(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);

	local_irq_restore(flags);

}