linux-kernel - [PATCH][RT] Dereference pointer to cpu id, not to address of CPUID

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Message-Id: <1226092407.5685.7.camel@dd>
Date:	Fri, 07 Nov 2008 13:13:27 -0800
From:	Sven-Thorsten Dietrich <sven@...bigcorporation.com>
To:	RT Users List <linux-rt-users@...r.kernel.org>
Cc:	LKML <Linux-kernel@...r.kernel.org>, Tony Jones <tonyj@...e.de>
Subject: [PATCH][RT] Dereference pointer to cpu id, not to address of CPUID

This patch applies to 2.6.25-rt, 2.6.26-rt and 2.6.27-rt


From: Sven-Thorsten Dietrich <sdietrich@...e.de>
Subject: Dereference pointer to cpu id, when evaluating condition.

Without dereferencing, the condition always evaluates to true.

Signed-off-by: Sven-Thorsten Dietrich <sdietrich@...e.de>
---
 mm/slab.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2033,7 +2033,7 @@ slab_destroy(struct kmem_cache *cachep,
 	} else {
 		kmem_freepages(cachep, addr);
 		if (OFF_SLAB(cachep)) {
-			if (this_cpu)
+			if (*this_cpu)
 				__cache_free(cachep->slabp_cache, slabp, this_cpu);
 			else
 				kmem_cache_free(cachep->slabp_cache, slabp);


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