From 83ce6ef8408bbc7d9322ab50ba592f83012dea94 Mon Sep 17 00:00:00 2001 From: Tony Luck Date: Thu, 28 Jun 2007 16:05:34 -0700 Subject: [PATCH] [IA64] Don't set psr.ic and psr.i simultaneously It's not a good idea to use "ssm psr.ic | psr.i" to simultaneously enable interrupts and interrupt state collection, the two bits can take effect asynchronously, so it is possible for an interrupt to be serviced while psr.ic is still zero. Signed-off-by: Tony Luck --- arch/ia64/kernel/mca_drv_asm.S | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/ia64/kernel/mca_drv_asm.S b/arch/ia64/kernel/mca_drv_asm.S index f2d4900..3bccb06 100644 --- a/arch/ia64/kernel/mca_drv_asm.S +++ b/arch/ia64/kernel/mca_drv_asm.S @@ -40,7 +40,11 @@ GLOBAL_ENTRY(mca_handler_bhhook) mov b6=loc1 ;; mov loc1=rp - ssm psr.i | psr.ic + ssm psr.ic + ;; + srlz.i + ;; + ssm psr.i br.call.sptk.many rp=b6 // does not return ... ;; mov ar.pfs=loc0 -- 2.7.4