perf tools: Introduce zalloc() for the common calloc(1, N) case

This way we type less characters and it looks more like the
kzalloc kernel counterpart.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1259071517-3242-3-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

5 files changed, 13 insertions, 9 deletions

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 271a1600e6f..4b586569bb0 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -63,7 +63,7 @@ int perf_header_attr__add_id(struct perf_header_attr *self, u64 id)
  */
 struct perf_header *perf_header__new(void)
 {
-	struct perf_header *self = calloc(sizeof(*self), 1);
+	struct perf_header *self = zalloc(sizeof(*self));
 
 	if (self != NULL) {
 		self->size = 1;
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 07002746927..9e5dbd66d34 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -197,7 +197,7 @@ struct tracepoint_path *tracepoint_id_to_path(u64 config)
 			if (id == config) {
 				closedir(evt_dir);
 				closedir(sys_dir);
-				path = calloc(1, sizeof(path));
+				path = zalloc(sizeof(path));
 				path->system = malloc(MAX_EVENT_LENGTH);
 				if (!path->system) {
 					free(path);
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index c4ca974b36e..8db85b4f553 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -94,15 +94,14 @@ static void kernel_maps__fixup_end(void)
 static struct symbol *symbol__new(u64 start, u64 len, const char *name)
 {
 	size_t namelen = strlen(name) + 1;
-	struct symbol *self = calloc(1, (symbol__priv_size +
-					 sizeof(*self) + namelen));
-	if (!self)
+	struct symbol *self = zalloc(symbol__priv_size +
+				     sizeof(*self) + namelen);
+	if (self == NULL)
 		return NULL;
 
-	if (symbol__priv_size) {
-		memset(self, 0, symbol__priv_size);
+	if (symbol__priv_size)
 		self = ((void *)self) + symbol__priv_size;
-	}
+
 	self->start = start;
 	self->end   = len ? start + len - 1 : start;
 
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 0f6d78c9863..1796625f778 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -11,7 +11,7 @@ static struct thread *last_match;
 
 static struct thread *thread__new(pid_t pid)
 {
-	struct thread *self = calloc(1, sizeof(*self));
+	struct thread *self = zalloc(sizeof(*self));
 
 	if (self != NULL) {
 		self->pid = pid;
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index e1c623e0c99..30c5517f2f9 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -302,6 +302,11 @@ extern int xdup(int fd);
 extern FILE *xfdopen(int fd, const char *mode);
 extern int xmkstemp(char *template);
 
+static inline void *zalloc(size_t size)
+{
+	return calloc(1, size);
+}
+
 static inline size_t xsize_t(off_t len)
 {
 	return (size_t)len;