From: Gerald Schaefer 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(-) Index: quilt-2.6/arch/s390/kernel/setup.c =================================================================== --- quilt-2.6.orig/arch/s390/kernel/setup.c +++ quilt-2.6/arch/s390/kernel/setup.c @@ -301,11 +301,7 @@ static int __init early_parse_mem(char * 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, -- blue skies, Martin. "Reality continues to ruin my life." - Calvin. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/