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[PATCH] lockdep: improve debug output 

Make lockdep print which lock is held, in the "kfree() of a live lock"
scenario.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Arjan van de Ven 2006-07-10 04:44:03 -07:00 committed by Linus Torvalds
parent 5fca80e8b4
commit 55794a412f
1 changed files with 3 additions and 2 deletions
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5
kernel/lockdep.c
View File

@ -2551,7 +2551,7 @@ static inline int in_range(const void *start, const void *addr, const void *end)
static void
print_freed_lock_bug(struct task_struct *curr, const void *mem_from,
const void *mem_to)
const void *mem_to, struct held_lock *hlock)
{
if (!debug_locks_off())
return;
@ -2563,6 +2563,7 @@ print_freed_lock_bug(struct task_struct *curr, const void *mem_from,
printk( "-------------------------\n");
printk("%s/%d is freeing memory %p-%p, with a lock still held there!\n",
curr->comm, curr->pid, mem_from, mem_to-1);
print_lock(hlock);
lockdep_print_held_locks(curr);
printk("\nstack backtrace:\n");
@ -2596,7 +2597,7 @@ void debug_check_no_locks_freed(const void *mem_from, unsigned long mem_len)
!in_range(mem_from, lock_to, mem_to))
continue;
print_freed_lock_bug(curr, mem_from, mem_to);
print_freed_lock_bug(curr, mem_from, mem_to, hlock);
break;
}
local_irq_restore(flags);