Commit 83ce6ef8 authored Jun 28, 2007 by Tony Luck

[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>

parent 7dcca30a

arch/ia64/kernel/mca_drv_asm.S

+5 −1

Original line number	Diff line number	Diff line
		@@ -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