From 4b2a8b6043979f1e6cc8aaa4116c95b31ae942ec Mon Sep 17 00:00:00 2001 From: Gerald Schaefer Date: Thu, 26 Mar 2009 15:24:22 +0100 Subject: [PATCH] [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 Signed-off-by: Martin Schwidefsky --- arch/s390/kernel/setup.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 0b8ad7b..dd3c517 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, -- 2.7.4