[PATCH v2 1/2] perf/core: remove some dead code

[PATCH v2 1/2] perf/core: remove some dead code

[Dan Carpenter]

perf_init_event() can't return NULL.  If it did, the error handling is
incomplete and we would crash.  I have removed this confusing dead code.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
v2: split it up

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 13f5b942580b..4c24bc4c8a63 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -9177,7 +9177,7 @@ static int perf_try_init_event(struct pmu *pmu, struct perf_event *event)
 
 static struct pmu *perf_init_event(struct perf_event *event)
 {
-	struct pmu *pmu = NULL;
+	struct pmu *pmu;
 	int idx;
 	int ret;
 
@@ -9461,9 +9461,7 @@ perf_event_alloc(struct perf_event_attr *attr, int cpu,
 	}
 
 	pmu = perf_init_event(event);
-	if (!pmu)
-		goto err_ns;
-	else if (IS_ERR(pmu)) {
+	if (IS_ERR(pmu)) {
 		err = PTR_ERR(pmu);
 		goto err_ns;
 	}

[tip:perf/core] perf/core: Remove some dead code

[tip-bot for Dan Carpenter]

Commit-ID:  85c617abc786d7da9e95c0b4174159864dd3f85c
Gitweb:     http://git.kernel.org/tip/85c617abc786d7da9e95c0b4174159864dd3f85c
Author:     Dan Carpenter <dan.carpenter@oracle.com>
AuthorDate: Mon, 22 May 2017 12:03:49 +0300
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 23 May 2017 09:50:05 +0200

perf/core: Remove some dead code

perf_init_event() can't return NULL.  If it did, the error handling is
incomplete and we would crash.  I have removed this confusing dead code.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/20170522090348.5g7yyld5en3yeky4@mwanda
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 kernel/events/core.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 6e75a5c..0028efa 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -9172,7 +9172,7 @@ static int perf_try_init_event(struct pmu *pmu, struct perf_event *event)
 
 static struct pmu *perf_init_event(struct perf_event *event)
 {
-	struct pmu *pmu = NULL;
+	struct pmu *pmu;
 	int idx;
 	int ret;
 
@@ -9456,9 +9456,7 @@ perf_event_alloc(struct perf_event_attr *attr, int cpu,
 	}
 
 	pmu = perf_init_event(event);
-	if (!pmu)
-		goto err_ns;
-	else if (IS_ERR(pmu)) {
+	if (IS_ERR(pmu)) {
 		err = PTR_ERR(pmu);
 		goto err_ns;
 	}