4.9-stable review patch. If anyone has any objections, please let me know.
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From: Arnd Bergmann arnd@arndb.de
commit f13d52cb3fad03c237572be2ee691e1fe2d1d7bb upstream.
This mirrors commit e9c38ceba8d9 ("ARM: 8455/1: define __BUG as asm(BUG_INSTR) without CONFIG_BUG") to make the behavior of arm64 consistent with arm and x86, and avoids lots of warnings in randconfig builds, such as:
kernel/seccomp.c: In function '__seccomp_filter': kernel/seccomp.c:666:1: error: no return statement in function returning non-void [-Werror=return-type]
Acked-by: Will Deacon will.deacon@arm.com Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Catalin Marinas catalin.marinas@arm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/arm64/include/asm/bug.h | 35 ++++++++++++++++++++--------------- 1 file changed, 20 insertions(+), 15 deletions(-)
--- a/arch/arm64/include/asm/bug.h +++ b/arch/arm64/include/asm/bug.h @@ -20,9 +20,6 @@
#include <asm/brk-imm.h>
-#ifdef CONFIG_GENERIC_BUG -#define HAVE_ARCH_BUG - #ifdef CONFIG_DEBUG_BUGVERBOSE #define _BUGVERBOSE_LOCATION(file, line) __BUGVERBOSE_LOCATION(file, line) #define __BUGVERBOSE_LOCATION(file, line) \ @@ -36,28 +33,36 @@ #define _BUGVERBOSE_LOCATION(file, line) #endif
-#define _BUG_FLAGS(flags) __BUG_FLAGS(flags) +#ifdef CONFIG_GENERIC_BUG
-#define __BUG_FLAGS(flags) asm volatile ( \ +#define __BUG_ENTRY(flags) \ ".pushsection __bug_table,"a"\n\t" \ ".align 2\n\t" \ "0: .long 1f - 0b\n\t" \ _BUGVERBOSE_LOCATION(__FILE__, __LINE__) \ ".short " #flags "\n\t" \ ".popsection\n" \ - \ - "1: brk %[imm]" \ - :: [imm] "i" (BUG_BRK_IMM) \ -) - -#define BUG() do { \ - _BUG_FLAGS(0); \ - unreachable(); \ + "1: " +#else +#define __BUG_ENTRY(flags) "" +#endif + +#define __BUG_FLAGS(flags) \ + asm volatile ( \ + __BUG_ENTRY(flags) \ + "brk %[imm]" :: [imm] "i" (BUG_BRK_IMM) \ + ); + + +#define BUG() do { \ + __BUG_FLAGS(0); \ + unreachable(); \ } while (0)
-#define __WARN_TAINT(taint) _BUG_FLAGS(BUGFLAG_TAINT(taint)) +#define __WARN_TAINT(taint) \ + __BUG_FLAGS(BUGFLAG_TAINT(taint))
-#endif /* ! CONFIG_GENERIC_BUG */ +#define HAVE_ARCH_BUG
#include <asm-generic/bug.h>