From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Thu, 7 Dec 2006 04:37:21 +0000 (-0800)
Subject: [PATCH] lockdep: print current locks on in_atomic warnings
X-Git-Tag: v2.6.20-rc1~145^2^2~166
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=a4c410f00f7ca4bd448b0d63f6f882fd244dc991;p=~shefty%2Frdma-dev.git

[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 1848e280504..343e1794233 100644
--- 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