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authorArjan van de Ven <arjan@Linux.intel.com>2006-07-10 04:44:03 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-10 13:24:14 -0700
commit55794a412fdf9af1744800e5020a4ec6b21e3cdc (patch)
tree3429cb26c5dfd484487b15827c655b5d080ce0f8 /kernel
parent5fca80e8b4bf5d69b900115b14342133ce81d79e (diff)
downloadop-kernel-dev-55794a412fdf9af1744800e5020a4ec6b21e3cdc.zip
op-kernel-dev-55794a412fdf9af1744800e5020a4ec6b21e3cdc.tar.gz
[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>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/lockdep.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 42af5cc..c1f34ad 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -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);
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