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| author | Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2009-03-26 15:24:22 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-03-26 15:24:18 +0100 |
| commit | 4b2a8b6043979f1e6cc8aaa4116c95b31ae942ec (patch) | |
| tree | 41045e6d0a16b0e61ec4c8705711044f43886827 /arch/s390/kernel | |
| parent | 8283cb43ab3e92a039d3486a0f6253df95a5fa55 (diff) | |
| download | linux-4b2a8b6043979f1e6cc8aaa4116c95b31ae942ec.tar.bz2 | |
[S390] kernel: Disable switch_amode by default
Disable switch_amode by default because pagetable walk on pre z9
hardware has negative performance impact.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/setup.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 0b8ad7b4f8f3..dd3c51736270 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -301,11 +301,7 @@ static int __init early_parse_mem(char *p) early_param("mem", early_parse_mem); #ifdef CONFIG_S390_SWITCH_AMODE -#ifdef CONFIG_PGSTE -unsigned int switch_amode = 1; -#else unsigned int switch_amode = 0; -#endif EXPORT_SYMBOL_GPL(switch_amode); static int set_amode_and_uaccess(unsigned long user_amode, |