The patch titled
lockdep: improve debug output
has been added to the -mm tree. Its filename is
improve-lockdep-debug-output.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: lockdep: improve debug output
From: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
Make lockdep print which lock is held, in the "kfree() of a live lock"
scenario.
Signed-off-by: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
kernel/lockdep.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff -puN kernel/lockdep.c~improve-lockdep-debug-output kernel/lockdep.c
--- a/kernel/lockdep.c~improve-lockdep-debug-output
+++ a/kernel/lockdep.c
@@ -2551,7 +2551,7 @@ static inline int in_range(const void *s
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
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 vo
!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);
_
Patches currently in -mm which might be from arjan@xxxxxxxxxxxxxxx are
improve-lockdep-debug-output.patch
-
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