diff options
| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2017-02-28 05:21:16 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-02-28 07:47:26 +0100 |
| commit | 4e4636cf981b5b629fbfb78aa9f232e015f7d521 (patch) | |
| tree | 1697356226b850eef54aa72908fd3964e64508df /include/linux/compiler-gcc.h | |
| parent | objtool: Prevent GCC from merging annotate_unreachable() (diff) | |
| download | linux-4e4636cf981b5b629fbfb78aa9f232e015f7d521.tar.xz linux-4e4636cf981b5b629fbfb78aa9f232e015f7d521.zip | |
objtool: Enclose contents of unreachable() macro in a block
Guenter Roeck reported a boot failure in mips64. It was bisected to the
following commit:
d1091c7fa3d5 ("objtool: Improve detection of BUG() and other dead ends")
The unreachable() macro was formerly only composed of a single
statement. The above commit added a second statement, but neglected to
enclose the statements in a block.
Suggested-by: Guenter Roeck <linux@roeck-us.net>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: d1091c7fa3d5 ("objtool: Improve detection of BUG() and other dead ends")
Link: http://lkml.kernel.org/r/20170228042116.glmwmwiohcix7o4a@treble
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | include/linux/compiler-gcc.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index de471346b365..f457b520ead6 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -215,7 +215,8 @@ * this in the preprocessor, but we can live with this because they're * unreleased. Really, we need to have autoconf for the kernel. */ -#define unreachable() annotate_unreachable(); __builtin_unreachable() +#define unreachable() \ + do { annotate_unreachable(); __builtin_unreachable(); } while (0) /* Mark a function definition as prohibited from being cloned. */ #define __noclone __attribute__((__noclone__, __optimize__("no-tracer"))) |