[tip:perf/core] perf/x86: Convert obsolete simple_strtoul() usage to kstrtoul()

[tip-bot for Shuah Khan <shuahkhan@gmail.com>]

Commit-ID:  e2b297fcf17fc03734e93387fb8195c782286b35
Gitweb:     http://git.kernel.org/tip/e2b297fcf17fc03734e93387fb8195c782286b35
Author:     Shuah Khan <shuahkhan@gmail.com>
AuthorDate: Sun, 10 Jun 2012 21:13:41 -0600
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Mon, 11 Jun 2012 10:52:12 +0200

perf/x86: Convert obsolete simple_strtoul() usage to kstrtoul()

Signed-off-by: Shuah Khan <shuahkhan@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1339384421.3025.8.camel@lorien2
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/kernel/cpu/perf_event.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 000a474..766c76d 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1640,7 +1640,12 @@ static ssize_t set_attr_rdpmc(struct device *cdev,
 			      struct device_attribute *attr,
 			      const char *buf, size_t count)
 {
-	unsigned long val = simple_strtoul(buf, NULL, 0);
+	unsigned long val;
+	ssize_t ret;
+
+	ret = kstrtoul(buf, 0, &val);
+	if (ret)
+		return ret;
 
 	if (!!val != !!x86_pmu.attr_rdpmc) {
 		x86_pmu.attr_rdpmc = !!val;