diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-10-27 12:05:58 -0700 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-11-05 23:54:38 -0500 |
| commit | 03d864093044380e2d810e10598c5b8400a835f1 (patch) | |
| tree | 43ada3792cb0037e1e1a385096a8136edd7e84c3 | |
| parent | 9a8466b5d6c650b6c7f9e632ce605cccd5df1097 (diff) | |
tools include: Add a __fallthrough statement
commit b5bf1733d6a391c4e90ea8f8468d83023be74a2a upstream.
For cases where implicit fall through case labels are intended,
to let us inform that to gcc >= 7:
CC /tmp/build/perf/util/string.o
util/string.c: In function 'perf_atoll':
util/string.c:22:7: error: this statement may fall through [-Werror=implicit-fallthrough=]
if (*p)
^
util/string.c:24:3: note: here
case '\0':
^~~~
So we introduce:
#define __fallthrough __attribute__ ((fallthrough))
And use it in such cases.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: William Cohen <wcohen@redhat.com>
Link: https://urldefense.proofpoint.com/v2/url?u=http-3A__lkml.kernel.org_n_tip-2Dqnpig0xfop4hwv6k4mv1wts5-40git.kernel.org&d=DwIBaQ&c=udBTRvFvXC5Dhqg7UHpJlPps3mZ3LRxpb6__0PomBTQ&r=bUtaaC9mlBij4OjEG_D-KPul_335azYzfC4Rjgomobo&m=GAo97FLdDeWyHR3RLNOe2cPjdhoFlwInMAhKwfihkCo&s=fYP1NHRfFvBmdEGmCYHsMROaOQkNtQVwBxQyqj_30Jc&e=
Fixes: ed8306908374 ("perf top: Use __fallthrough")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
| -rw-r--r-- | tools/include/linux/compiler.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/include/linux/compiler.h b/tools/include/linux/compiler.h index 88461f09cc86..8717c80f759c 100644 --- a/tools/include/linux/compiler.h +++ b/tools/include/linux/compiler.h @@ -37,4 +37,12 @@ #define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x)) +#ifndef __fallthrough +# if defined(__GNUC__) && __GNUC__ >= 7 +# define __fallthrough __attribute__ ((fallthrough)) +# else +# define __fallthrough +# endif +#endif + #endif /* _TOOLS_LINUX_COMPILER_H */ |