Commit 52cef189 authored Nov 28, 2011 by Peter Zijlstra Committed by Ingo Molnar Dec 05, 2011

slab, lockdep: Fix silly bug



Commit 30765b92 ("slab, lockdep: Annotate the locks before using
them") moves the init_lock_keys() call from after g_cpucache_up =
FULL, to before it. And overlooks the fact that init_node_lock_keys()
tests for it and ignores everything !FULL.

Introduce a LATE stage and change the lockdep test to be <LATE.

Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: stable@kernel.org
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 8e8da023

mm/slab.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -595,6 +595,7 @@ static enum {
		PARTIAL_AC,
		PARTIAL_L3,
		EARLY,
		LATE,
		FULL
		} g_cpucache_up;

		@@ -671,7 +672,7 @@ static void init_node_lock_keys(int q)
		{
		struct cache_sizes *s = malloc_sizes;

		if (g_cpucache_up != FULL)
		if (g_cpucache_up < LATE)
		return;

		for (s = malloc_sizes; s->cs_size != ULONG_MAX; s++) {
		@@ -1666,6 +1667,8 @@ void __init kmem_cache_init_late(void)
		{
		struct kmem_cache *cachep;

		g_cpucache_up = LATE;

		/* Annotate slab for lockdep -- annotate the malloc caches */
		init_lock_keys();