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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-07-12 15:29:31 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-07-12 20:20:34 +0200 |
| commit | c7007e983682b31d91e9ad7c3e85c49ffcc3651f (patch) | |
| tree | b4ecc87ce9e43a34a2424159bd5e09e26fd2efb3 /tools/perf/util/cloexec.c | |
| parent | tools: Copy uapi/linux/hw_breakpoint.h from the kernel (diff) | |
| download | linux-c7007e983682b31d91e9ad7c3e85c49ffcc3651f.tar.xz linux-c7007e983682b31d91e9ad7c3e85c49ffcc3651f.zip | |
perf tools: Introduce weak alternative to sched_getcpu()
Which is just a wrapper for sys_getcpu and is not present in at least
musl libc.
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>
Link: http://lkml.kernel.org/n/tip-kblef7svmhr0g93kkx78envg@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/cloexec.c')
| -rw-r--r-- | tools/perf/util/cloexec.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/tools/perf/util/cloexec.c b/tools/perf/util/cloexec.c index fde772db1d5c..f0dcd0ee0afa 100644 --- a/tools/perf/util/cloexec.c +++ b/tools/perf/util/cloexec.c @@ -4,18 +4,24 @@ #include "cloexec.h" #include "asm/bug.h" #include "debug.h" +#include <unistd.h> +#include <asm/unistd.h> +#include <sys/syscall.h> static unsigned long flag = PERF_FLAG_FD_CLOEXEC; -#ifdef __GLIBC_PREREQ -#if !__GLIBC_PREREQ(2, 6) int __weak sched_getcpu(void) { +#ifdef __NR_getcpu + unsigned cpu; + int err = syscall(__NR_getcpu, &cpu, NULL, NULL); + if (!err) + return cpu; +#else errno = ENOSYS; +#endif return -1; } -#endif -#endif static int perf_flag_probe(void) { |