perf dso: Simplify dso_cache__read function

There's no need for the while loop now, also we can connect two (ret > 0) condition legs together. Signed-off-by: Jiri Olsa <[email protected]> Acked-by: Song Liu <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Song Liu <[email protected]> Cc: Stanislav Fomichev <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
jb55 · May 28, 2019 · cacddfe · cacddfe
1 parent ea5db1b
commit cacddfe
Showing 1 changed file with 6 additions and 11 deletions.
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
@@ -823,25 +823,20 @@ static ssize_t
 dso_cache__read(struct dso *dso, struct machine *machine,
 		u64 offset, u8 *data, ssize_t size)
 {
+	u64 cache_offset = offset & DSO__DATA_CACHE_MASK;
 	struct dso_cache *cache;
 	struct dso_cache *old;
 	ssize_t ret;
 
-	do {
-		u64 cache_offset = offset & DSO__DATA_CACHE_MASK;
-
-		cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE);
-		if (!cache)
-			return -ENOMEM;
-
-		ret = file_read(dso, machine, cache_offset, cache->data);
+	cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE);
+	if (!cache)
+		return -ENOMEM;
 
+	ret = file_read(dso, machine, cache_offset, cache->data);
+	if (ret > 0) {
 		cache->offset = cache_offset;
 		cache->size   = ret;
-	} while (0);
-
 
-	if (ret > 0) {
 		old = dso_cache__insert(dso, cache);
 		if (old) {
 			/* we lose the race */