The patch titled
uml: make UML_SETJMP always safe
has been removed from the -mm tree. Its filename is
uml-make-uml_setjmp-always-safe.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: uml: make UML_SETJMP always safe
From: Paolo 'Blaisorblade' Giarrusso <blaisorblade@xxxxxxxx>
If enable is moved by GCC in a register its value may not be preserved after
coming back there with longjmp(). So, mark it as volatile to prevent this;
this is suggested (it seems) in info gcc, when it talks about -Wuninitialized.
I re-read this and it seems to say something different, but I still believe
this may be needed.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@xxxxxxxx>
Cc: Jeff Dike <jdike@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/um/include/longjmp.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN arch/um/include/longjmp.h~uml-make-uml_setjmp-always-safe arch/um/include/longjmp.h
--- a/arch/um/include/longjmp.h~uml-make-uml_setjmp-always-safe
+++ a/arch/um/include/longjmp.h
@@ -12,7 +12,8 @@ extern void longjmp(jmp_buf, int);
} while(0)
#define UML_SETJMP(buf) ({ \
- int n, enable; \
+ int n; \
+ volatile int enable; \
enable = get_signals(); \
n = setjmp(*buf); \
if(n != 0) \
_
Patches currently in -mm which might be from blaisorblade@xxxxxxxx are
origin.patch
-
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