[patch] Force error to surface in nofault code
Montecito behaves slightly differently than previous processors,
resulting in the MCA due to a failed PIO read to sometimes surfacing
outside the nofault code. Adding an additional or and stop bits
ensures the MCA surfaces in the nofault code.
Signed-off-by: Russ Anderson <[EMAIL PROTECTED]>
---
arch/ia64/sn/kernel/xp_nofault.S | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
Index: test/arch/ia64/sn/kernel/xp_nofault.S
===================================================================
--- test.orig/arch/ia64/sn/kernel/xp_nofault.S 2007-06-11 14:18:47.089395741
-0500
+++ test/arch/ia64/sn/kernel/xp_nofault.S 2007-06-14 15:30:23.572078520
-0500
@@ -21,7 +21,8 @@
xp_nofault_PIOR:
mov r8=r0 // Stage a success return value
ld8.acq r9=[r32];; // PIO Read the specified register
- adds r9=1,r9 // Add to force a consume
+ adds r9=1,r9;; // Add to force consumption
+ or r9=r9,r9;; // Or to force consumption
br.ret.sptk.many b0;; // Return success
.global xp_error_PIOR
--
Russ Anderson, OS RAS/Partitioning Project Lead
SGI - Silicon Graphics Inc [EMAIL PROTECTED]
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