perf util: Remove weak sched_getcpu

sched_getcpu may not be present and so a feature test and definition
exist to workaround this in the build. The feature test is used to
define HAVE_SCHED_GETCPU_SUPPORT and so this is sufficient to know
whether the local sched_getcpu is needed and a weak symbol can be
avoided.

Signed-off-by: Ian Rogers <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Leo Yan <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Martin Liška <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Nathan Chancellor <[email protected]>
Cc: Nick Desaulniers <[email protected]>
Cc: Pavithra Gurushankar <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Quentin Monnet <[email protected]>
Cc: Roberto Sassu <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Tiezhu Yang <[email protected]>
Cc: Tom Rix <[email protected]>
Cc: Yang Jihong <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

2 files changed, 16 insertions, 13 deletions

diff --git a/tools/perf/util/cloexec.c b/tools/perf/util/cloexec.c
index fa8248aadb59..8830604c3a8d 100644
--- a/tools/perf/util/cloexec.c
+++ b/tools/perf/util/cloexec.c
@@ -13,19 +13,6 @@
 
 static unsigned long flag = PERF_FLAG_FD_CLOEXEC;
 
-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;
-}
-
 static int perf_flag_probe(void)
 {
 	/* use 'safest' configuration as used in evsel__fallback() */
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 391c1e928bd7..b356c9f7f0c3 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -533,3 +533,19 @@ int do_realloc_array_as_needed(void **arr, size_t *arr_sz, size_t x, size_t msz,
 	*arr_sz = new_sz;
 	return 0;
 }
+
+#ifndef HAVE_SCHED_GETCPU_SUPPORT
+int sched_getcpu(void)
+{
+#ifdef __NR_getcpu
+	unsigned int cpu;
+	int err = syscall(__NR_getcpu, &cpu, NULL, NULL);
+
+	if (!err)
+		return cpu;
+#else
+	errno = ENOSYS;
+#endif
+	return -1;
+}
+#endif