path: root/arch/s390/kernel
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authorHeiko Carstens <heiko.carstens@de.ibm.com>2011-01-05 12:48:00 +0100
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2011-01-05 12:47:29 +0100
commitf3e1a273594c7d82b07102bd03e8adfe681f2864 (patch)
treef846796b8751fc9f64f3eed1e1c9344620688b9f /arch/s390/kernel
parentaa3a41d009d433dd9775b356b2d70551816f1f3c (diff)
[S390] nmi: enable machine checks early
Until now machine checks for the swapper process of the IPL cpu are just implicitly (and more or less accidently) enabled when the first time the idle process goes into idle state and loads an enabled wait psw. Before that machine checks are disabled. So let's enable them explicitly in trap_init() so we have a well defined time when machine checks are enabled. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel')
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index f6342ec084a4..4f0cecb4f9e0 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -733,4 +733,6 @@ void __init trap_init(void)
pgm_check_table[0x15] = &operand_exception;
pgm_check_table[0x1C] = &space_switch_exception;
pgm_check_table[0x1D] = &hfp_sqrt_exception;
+ /* Enable machine checks early. */
+ local_mcck_enable();