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authorSebastian Ott <sebott@linux.vnet.ibm.com>2014-11-28 17:40:57 +0300
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2014-12-01 13:06:55 +0300
commit2cb4a18262fd0108cb8abd875710c59d0aa66f1d (patch)
tree7312af84b255c04028d95ada295bb1d8711d87ff /arch/s390
parent009d0431c3914de64666bec0d350e54fdd59df6a (diff)
downloadlinux-2cb4a18262fd0108cb8abd875710c59d0aa66f1d.tar.xz
s390: fix machine check handling
Commit eb7e7d76 "s390: Replace __get_cpu_var uses" broke machine check handling. We copy machine check information from per-cpu to a stack variable for local processing. Next we should zap the per-cpu variable, not the stack variable. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/kernel/nmi.c8
1 files changed, 2 insertions, 6 deletions
diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c
index dd1c24ceda50..3f51cf4e8f02 100644
--- a/arch/s390/kernel/nmi.c
+++ b/arch/s390/kernel/nmi.c
@@ -54,12 +54,8 @@ void s390_handle_mcck(void)
*/
local_irq_save(flags);
local_mcck_disable();
- /*
- * Ummm... Does this make sense at all? Copying the percpu struct
- * and then zapping it one statement later?
- */
- memcpy(&mcck, this_cpu_ptr(&cpu_mcck), sizeof(mcck));
- memset(&mcck, 0, sizeof(struct mcck_struct));
+ mcck = *this_cpu_ptr(&cpu_mcck);
+ memset(this_cpu_ptr(&cpu_mcck), 0, sizeof(mcck));
clear_cpu_flag(CIF_MCCK_PENDING);
local_mcck_enable();
local_irq_restore(flags);