[PATCH] lockdep: print current locks on in_atomic warnings

Add debug_show_held_locks(current) to __might_sleep() and schedule(); this
makes finding the offending lock leak easier.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/kernel/sched.c b/kernel/sched.c
index 1848e280504df5f6a671ab7fc2176d3d16927afc..343e1794233e8054708de25d83f1a3a628cb1d18 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3333,6 +3333,7 @@ asmlinkage void __sched schedule(void)
                printk(KERN_ERR "BUG: scheduling while atomic: "
                        "%s/0x%08x/%d\n",
                        current->comm, preempt_count(), current->pid);
+               debug_show_held_locks(current);
                dump_stack();
        }
        profile_hit(SCHED_PROFILING, __builtin_return_address(0));
@@ -6872,6 +6873,7 @@ void __might_sleep(char *file, int line)
                                " context at %s:%d\n", file, line);
                printk("in_atomic():%d, irqs_disabled():%d\n",
                        in_atomic(), irqs_disabled());
+               debug_show_held_locks(current);
                dump_stack();
        }
 #endif