Commit 4b2a8b60 authored by Gerald Schaefer's avatar Gerald Schaefer Committed by Martin Schwidefsky
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[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: default avatarGerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 8283cb43
...@@ -301,11 +301,7 @@ static int __init early_parse_mem(char *p) ...@@ -301,11 +301,7 @@ static int __init early_parse_mem(char *p)
early_param("mem", early_parse_mem); early_param("mem", early_parse_mem);
#ifdef CONFIG_S390_SWITCH_AMODE #ifdef CONFIG_S390_SWITCH_AMODE
#ifdef CONFIG_PGSTE
unsigned int switch_amode = 1;
#else
unsigned int switch_amode = 0; unsigned int switch_amode = 0;
#endif
EXPORT_SYMBOL_GPL(switch_amode); EXPORT_SYMBOL_GPL(switch_amode);
static int set_amode_and_uaccess(unsigned long user_amode, static int set_amode_and_uaccess(unsigned long user_amode,
......
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