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[S390] nmi: enable machine checks early

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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>
This commit is contained in:
Heiko Carstens 2011-01-05 12:48:00 +01:00 committed by Martin Schwidefsky
parent aa3a41d009
commit f3e1a27359
1 changed files with 2 additions and 0 deletions
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arch/s390/kernel/traps.c
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@ -733,4 +733,6 @@ void __init trap_init(void)
pgm_check_table[0x15] = &operand_exception; pgm_check_table[0x15] = &operand_exception;
pgm_check_table[0x1C] = &space_switch_exception; pgm_check_table[0x1C] = &space_switch_exception;
pgm_check_table[0x1D] = &hfp_sqrt_exception; pgm_check_table[0x1D] = &hfp_sqrt_exception;
/* Enable machine checks early. */
local_mcck_enable();
} }