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From: Jeff Dike <jdike@addtoit.com>
To: akpm@osdl.org
Cc: linux-kernel@vger.kernel.org,
	user-mode-linux-devel@lists.sourceforge.net
Subject: [PATCH 10/11] UML - Use setjmp/longjmp instead of sigsetjmp/siglongjmp
Date: Sun, 15 Jan 2006 16:39:53 -0500	[thread overview]
Message-ID: <200601152139.k0FLdrwi027752@ccure.user-mode-linux.org> (raw)

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; })


                 reply	other threads:[~2006-01-15 20:48 UTC|newest]

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