* [PATCH] Prevent SAL calls from being preempted
@ 2003-12-18 20:30 Bjorn Helgaas
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From: Bjorn Helgaas @ 2003-12-18 20:30 UTC (permalink / raw)
To: linux-ia64
ia64: Prevent SAL calls from being preempted.
(SAL_CALL_REENTRANT): Disable preemption around the SAL call to
make sure we don't get rescheduled on a different CPU.
=== include/asm-ia64/sal.h 1.19 vs edited ==--- 1.19/include/asm-ia64/sal.h Sat Aug 16 18:31:13 2003
+++ edited/include/asm-ia64/sal.h Wed Dec 10 14:10:04 2003
@@ -71,7 +71,9 @@
# define SAL_CALL_REENTRANT(result,args...) do { \
struct ia64_fpreg __ia64_scs_fr[6]; \
ia64_save_scratch_fpregs(__ia64_scs_fr); \
+ preempt_disable(); \
__SAL_CALL(result, args); \
+ preempt_enable(); \
ia64_load_scratch_fpregs(__ia64_scs_fr); \
} while (0)
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2003-12-18 20:30 [PATCH] Prevent SAL calls from being preempted Bjorn Helgaas
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