GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

perf tools: Introduce weak alternative to sched_getcpu()

Browse source 
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>
This commit is contained in:
Arnaldo Carvalho de Melo 2016-07-12 10:29:31 -03:00
parent 4998a12246
commit c7007e9836
4 changed files with 20 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

14
tools/perf/util/cloexec.c
View file

@ -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)
{