[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 <rja@xxxxxxx> --- 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 rja@xxxxxxx - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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