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authorTony Luck <tony.luck@intel.com>2007-06-28 16:05:34 -0700
committerTony Luck <tony.luck@intel.com>2007-07-09 10:30:28 -0700
commit83ce6ef8408bbc7d9322ab50ba592f83012dea94 (patch)
tree46fe432c39860e7b46d622ab306494613b29b8ae /arch
parent7dcca30a32aadb0520417521b0c44f42d09fe05c (diff)
[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 <tony.luck@intel.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/ia64/kernel/mca_drv_asm.S6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/ia64/kernel/mca_drv_asm.S b/arch/ia64/kernel/mca_drv_asm.S
index f2d4900751b..3bccb06c8d2 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