This is a note to let you know that I've just added the patch titled
perf tools: Work around lack of sched_getcpu in glibc < 2.6.
to the 4.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
perf-tools-work-around-lack-of-sched_getcpu-in-glibc-2.6.patch
and it can be found in the queue-4.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e1e455f4f4d35850c30235747620d0d078fe9f64 Mon Sep 17 00:00:00 2001
From: Vinson Lee <vlee@xxxxxxxxxxx>
Date: Mon, 23 Mar 2015 12:09:16 -0700
Subject: perf tools: Work around lack of sched_getcpu in glibc < 2.6.
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From: Vinson Lee <vlee@xxxxxxxxxxx>
commit e1e455f4f4d35850c30235747620d0d078fe9f64 upstream.
This patch fixes this build error with glibc < 2.6.
CC util/cloexec.o
cc1: warnings being treated as errors
util/cloexec.c: In function ‘perf_flag_probe’:
util/cloexec.c:24: error: implicit declaration of function
‘sched_getcpu’
util/cloexec.c:24: error: nested extern declaration of ‘sched_getcpu’
make: *** [util/cloexec.o] Error 1
Signed-off-by: Vinson Lee <vlee@xxxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Acked-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Yann Droneaud <ydroneaud@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1427137761-16119-1-git-send-email-vlee@xxxxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
tools/perf/util/cloexec.c | 6 ++++++
tools/perf/util/cloexec.h | 6 ++++++
2 files changed, 12 insertions(+)
--- a/tools/perf/util/cloexec.c
+++ b/tools/perf/util/cloexec.c
@@ -7,6 +7,12 @@
static unsigned long flag = PERF_FLAG_FD_CLOEXEC;
+int __weak sched_getcpu(void)
+{
+ errno = ENOSYS;
+ return -1;
+}
+
static int perf_flag_probe(void)
{
/* use 'safest' configuration as used in perf_evsel__fallback() */
--- a/tools/perf/util/cloexec.h
+++ b/tools/perf/util/cloexec.h
@@ -3,4 +3,10 @@
unsigned long perf_event_open_cloexec_flag(void);
+#ifdef __GLIBC_PREREQ
+#if !__GLIBC_PREREQ(2, 6)
+extern int sched_getcpu(void) __THROW;
+#endif
+#endif
+
#endif /* __PERF_CLOEXEC_H */
Patches currently in stable-queue which might be from vlee@xxxxxxxxxxx are
queue-4.0/perf-tools-work-around-lack-of-sched_getcpu-in-glibc-2.6.patch
queue-4.0/perf-symbols-define-stt_gnu_ifunc-for-glibc-2.9-and-older.patch
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