* [PATCH 10/11] UML - Use setjmp/longjmp instead of sigsetjmp/siglongjmp
@ 2006-01-15 21:39 Jeff Dike
0 siblings, 0 replies; only message in thread
From: Jeff Dike @ 2006-01-15 21:39 UTC (permalink / raw)
To: akpm; +Cc: linux-kernel, user-mode-linux-devel
Now that we are doing soft interrupts, there's no point in using
sigsetjmp and siglongjmp. Using setjmp and longjmp saves a
sigprocmask on every jump.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Index: linux-2.6.15-mm/arch/um/include/longjmp.h
===================================================================
--- linux-2.6.15-mm.orig/arch/um/include/longjmp.h 2006-01-09 11:44:53.000000000 -0500
+++ linux-2.6.15-mm/arch/um/include/longjmp.h 2006-01-09 11:48:47.000000000 -0500
@@ -5,13 +5,13 @@
#include "os.h"
#define UML_SIGLONGJMP(buf, val) do { \
- siglongjmp(*buf, val); \
+ longjmp(*buf, val); \
} while(0)
#define UML_SIGSETJMP(buf, enable) ({ \
int n; \
enable = get_signals(); \
- n = sigsetjmp(*buf, 1); \
+ n = setjmp(*buf); \
if(n != 0) \
set_signals(enable); \
n; })
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