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| author | Arnd Bergmann <arnd@arndb.de> | 2017-03-30 00:16:31 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-03-30 10:12:10 +0300 |
| commit | 70579a86e3c8eb2ce57999e594a73b4dfe095959 (patch) | |
| tree | ed0bb8685c56a9c5e53b24cc6a44abdf1291577d | |
| parent | 9a93848fe787a53aec404e4e00d8f7f9bbdaebb4 (diff) | |
| download | linux-70579a86e3c8eb2ce57999e594a73b4dfe095959.tar.xz | |
x86/debug: Define BUG() again for !CONFIG_BUG
The latest change to the BUG() macro inadvertently reverted the earlier
commit:
b06dd879f5db ("x86: always define BUG() and HAVE_ARCH_BUG, even with !CONFIG_BUG")
... that sanitized the behavior with CONFIG_BUG=n.
I noticed this as some warnings have appeared again that were previously
fixed as a side effect of that patch:
kernel/seccomp.c: In function '__seccomp_filter':
kernel/seccomp.c:670:1: error: no return statement in function returning non-void [-Werror=return-type]
...
This combines the two patches and uses the ud2 macro to define BUG()
in case of CONFIG_BUG=n.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 9a93848fe787 ("x86/debug: Implement __WARN() using UD0")
Link: http://lkml.kernel.org/r/20170329211646.2707365-1-arnd@arndb.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | arch/x86/include/asm/bug.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/arch/x86/include/asm/bug.h b/arch/x86/include/asm/bug.h index 4fde330c44b7..cecf559d0012 100644 --- a/arch/x86/include/asm/bug.h +++ b/arch/x86/include/asm/bug.h @@ -23,7 +23,6 @@ #define LEN_UD0 2 #ifdef CONFIG_GENERIC_BUG -#define HAVE_ARCH_BUG #ifdef CONFIG_X86_32 # define __BUG_REL(val) ".long " __stringify(val) @@ -64,6 +63,13 @@ do { \ #endif /* CONFIG_DEBUG_BUGVERBOSE */ +#else + +#define _BUG_FLAGS(ins, flags) asm volatile(ins) + +#endif /* CONFIG_GENERIC_BUG */ + +#define HAVE_ARCH_BUG #define BUG() \ do { \ _BUG_FLAGS(ASM_UD2, 0); \ @@ -72,8 +78,6 @@ do { \ #define __WARN_TAINT(taint) _BUG_FLAGS(ASM_UD0, BUGFLAG_TAINT(taint)) -#endif /* CONFIG_GENERIC_BUG */ - #include <asm-generic/bug.h> #endif /* _ASM_X86_BUG_H */ |