Hi, would it be possible to have this one for 3.18 (if not, please add Cc: [email protected] # v3.18)
Regards, Sebastian >8----- >From ca198a6ff5766f19645104b7f8d621774524c4b4 Mon Sep 17 00:00:00 2001 From: Sebastian Ott <[email protected]> Date: Fri, 28 Nov 2014 15:40:57 +0100 Subject: [PATCH] s390: fix machine check handling Commit eb7e7d76 "s390: Replace __get_cpu_var uses" broke machine check handling. We copy machine check information from per-cpu to a stack variable for local processing. Next we should zap the per-cpu variable, not the stack variable. Signed-off-by: Sebastian Ott <[email protected]> Reviewed-by: Heiko Carstens <[email protected]> --- arch/s390/kernel/nmi.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c index dd1c24c..3f51cf4 100644 --- a/arch/s390/kernel/nmi.c +++ b/arch/s390/kernel/nmi.c @@ -54,12 +54,8 @@ void s390_handle_mcck(void) */ local_irq_save(flags); local_mcck_disable(); - /* - * Ummm... Does this make sense at all? Copying the percpu struct - * and then zapping it one statement later? - */ - memcpy(&mcck, this_cpu_ptr(&cpu_mcck), sizeof(mcck)); - memset(&mcck, 0, sizeof(struct mcck_struct)); + mcck = *this_cpu_ptr(&cpu_mcck); + memset(this_cpu_ptr(&cpu_mcck), 0, sizeof(mcck)); clear_cpu_flag(CIF_MCCK_PENDING); local_mcck_enable(); local_irq_restore(flags); -- 1.8.4.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
