From e29aeeee7236122c4d807ec9ebc721b5d7d75c8d Mon Sep 17 00:00:00 2001
From: Sukadev Bhattiprolu <suka...@linux.vnet.ibm.com>
Date: Thu, 24 Sep 2015 17:53:49 -0400
Subject: [PATCH v2] perf: Fix build break on powerpc due to sample_reg_masks
perf_regs.c does not get built on Powerpc as CONFIG_PERF_REGS is false.
So the weak definition for 'sample_regs_masks' doesn't get picked up.
Adding perf_regs.o to util/Build unconditionally, exposes a redefinition
error for 'perf_reg_value()' function (due to the static inline version
in util/perf_regs.h). So use #ifdef HAVE_PERF_REGS_SUPPORT' around that
function.
Signed-off-by: Sukadev Bhattiprolu <suka...@linux.vnet.ibm.com>
---
Changelog[v2]
- [Jiri Olsa] include <linux/compiler.h> for __maybe_unused
---
tools/perf/util/Build | 2 +-
tools/perf/util/perf_regs.c | 2 ++
tools/perf/util/perf_regs.h | 1 +
3 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index 4bc7a9a..9217119 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -18,6 +18,7 @@ libperf-y += levenshtein.o
libperf-y += llvm-utils.o
libperf-y += parse-options.o
libperf-y += parse-events.o
+libperf-y += perf_regs.o
libperf-y += path.o
libperf-y += rbtree.o
libperf-y += bitmap.o
@@ -104,7 +105,6 @@ libperf-$(CONFIG_LIBBABELTRACE) += data-convert-bt.o
libperf-y += scripting-engines/
-libperf-$(CONFIG_PERF_REGS) += perf_regs.o
libperf-$(CONFIG_ZLIB) += zlib.o
libperf-$(CONFIG_LZMA) += lzma.o
diff --git a/tools/perf/util/perf_regs.c b/tools/perf/util/perf_regs.c
index 885e8ac..6b8eb13 100644
--- a/tools/perf/util/perf_regs.c
+++ b/tools/perf/util/perf_regs.c
@@ -6,6 +6,7 @@ const struct sample_reg __weak sample_reg_masks[] = {
SMPL_REG_END
};
+#ifdef HAVE_PERF_REGS_SUPPORT
int perf_reg_value(u64 *valp, struct regs_dump *regs, int id)
{
int i, idx = 0;
@@ -29,3 +30,4 @@ out:
*valp = regs->cache_regs[id];
return 0;
}
+#endif
diff --git a/tools/perf/util/perf_regs.h b/tools/perf/util/perf_regs.h
index 2984dcc..679d6e4 100644
--- a/tools/perf/util/perf_regs.h
+++ b/tools/perf/util/perf_regs.h
@@ -2,6 +2,7 @@
#define __PERF_REGS_H
#include <linux/types.h>
+#include <linux/compiler.h>
struct regs_dump;
--
1.8.3.1
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