The patch titled
uml: make UML_SETJMP always safe
has been added to the -mm tree. Its filename is
uml-make-uml_setjmp-always-safe.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
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 files 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
uml-fix-compilation-options-for-user_objs.patch
uml-revert-wrong-patch.patch
uml-correct-removal-of-pte_mkexec.patch
uml-readd-forgot-prototype.patch
uml-make-tt-mode-compile-after-setjmp-related-changes.patch
uml-make-uml_setjmp-always-safe.patch
uml-fix-processor-selection-to-exclude-unsupported-processors-and-features.patch
uml-fix-uname-under-setarch-i386.patch
uml-declare-in-kconfig-our-partial-lockdep-support.patch
uml-allow-using-again-x86-x86_64-crypto-code.patch
uml-asm-offsets-duplication-removal.patch
uml-remove-duplicate-export.patch
uml-deprecate-config_mode_tt.patch
uml-allow-finer-tuning-for-host-vmsplit-setting.patch
-
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