perfctr-watchdog: fix interchanged parameters to release_{evntsel,perfctr}_nmi
authorBjörn Steinbrink <B.Steinbrink@gmx.de>
Sat, 16 Jun 2007 17:16:04 +0000 (10:16 -0700)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Sat, 16 Jun 2007 20:16:15 +0000 (13:16 -0700)
Fix oops triggered during: echo 0 > /proc/sys/kernel/nmi_watchdog

The culprit seems to be 09198e68501a7e34737cd9264d266f42429abcdc:
[PATCH] i386: Clean up NMI watchdog code

In two places, the parameters to release_{evntsel,perfctr}_nmi
got interchanged during the cleanup.

Fix interchanged parameters to release_{evntsel,perfctr}_nmi.

Signed-off-by: Björn Steinbrink <B.Steinbrink@gmx.de>
Cc: Stephane Eranian <eranian@hpl.hp.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/i386/kernel/cpu/perfctr-watchdog.c

index 98488f9..f0b6763 100644 (file)
@@ -276,8 +276,8 @@ static int single_msr_reserve(void)
 
 static void single_msr_unreserve(void)
 {
-       release_evntsel_nmi(wd_ops->perfctr);
-       release_perfctr_nmi(wd_ops->evntsel);
+       release_evntsel_nmi(wd_ops->evntsel);
+       release_perfctr_nmi(wd_ops->perfctr);
 }
 
 static void single_msr_rearm(struct nmi_watchdog_ctlblk *wd, unsigned nmi_hz)
@@ -475,10 +475,10 @@ static void p4_unreserve(void)
 {
 #ifdef CONFIG_SMP
        if (smp_num_siblings > 1)
-               release_evntsel_nmi(MSR_P4_IQ_PERFCTR1);
+               release_perfctr_nmi(MSR_P4_IQ_PERFCTR1);
 #endif
-       release_evntsel_nmi(MSR_P4_IQ_PERFCTR0);
-       release_perfctr_nmi(MSR_P4_CRU_ESCR0);
+       release_evntsel_nmi(MSR_P4_CRU_ESCR0);
+       release_perfctr_nmi(MSR_P4_IQ_PERFCTR0);
 }
 
 static void p4_rearm(struct nmi_watchdog_ctlblk *wd, unsigned nmi_hz)