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From:   Yury Norov <yury.norov@gmail.com>
To:     Yury Norov <yury.norov@gmail.com>,
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Subject: [PATCH 12/54] tools/perf: replace bitmap_weight with bitmap_empty where appropriate
Date:   Sun, 23 Jan 2022 10:38:43 -0800
Message-Id: <20220123183925.1052919-13-yury.norov@gmail.com>
In-Reply-To: <20220123183925.1052919-1-yury.norov@gmail.com>
References: <20220123183925.1052919-1-yury.norov@gmail.com>
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Some code in builtin-c2c.c calls bitmap_weight() to check if any bit of
a given bitmap is set. It's better to use bitmap_empty() in that case
because bitmap_empty() stops traversing the bitmap as soon as it finds
first set bit, while bitmap_weight() counts all bits unconditionally.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
---
 tools/perf/builtin-c2c.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 77dd4afacca4..14f787c67140 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -1080,7 +1080,7 @@ node_entry(struct perf_hpp_fmt *fmt __maybe_unused, struct perf_hpp *hpp,
 		bitmap_zero(set, c2c.cpus_cnt);
 		bitmap_and(set, c2c_he->cpuset, c2c.nodes[node], c2c.cpus_cnt);
 
-		if (!bitmap_weight(set, c2c.cpus_cnt)) {
+		if (bitmap_empty(set, c2c.cpus_cnt)) {
 			if (c2c.node_info == 1) {
 				ret = scnprintf(hpp->buf, hpp->size, "%21s", " ");
 				advance_hpp(hpp, ret);
@@ -1944,7 +1944,7 @@ static int set_nodestr(struct c2c_hist_entry *c2c_he)
 	if (c2c_he->nodestr)
 		return 0;
 
-	if (bitmap_weight(c2c_he->nodeset, c2c.nodes_cnt)) {
+	if (!bitmap_empty(c2c_he->nodeset, c2c.nodes_cnt)) {
 		len = bitmap_scnprintf(c2c_he->nodeset, c2c.nodes_cnt,
 				      buf, sizeof(buf));
 	} else {
-- 
2.30.2