linux-kernel - [PATCH] perf tools: util: remove redundant va_end() in strbuf

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Message-ID: <20181229141750.16945-1-2pi@mok.nu>
Date:   Sat, 29 Dec 2018 15:17:50 +0100
From:   Mattias Jacobsson <2pi@....nu>
To:     <peterz@...radead.org>, <mingo@...hat.com>, <acme@...nel.org>
CC:     <sansharm@...hat.com>, <linux-kernel@...r.kernel.org>, <2pi@....nu>
Subject: [PATCH] perf tools: util: remove redundant va_end() in strbuf_addv()

Each call to va_copy() should have one, and only one, corresponding call
to va_end(). In strbuf_addv() some code paths result in va_end() getting
called multiple times. Remove the superfluous va_end().

Fixes: ce49d8436cff ("perf strbuf: Match va_{add,copy} with va_end")
Signed-off-by: Mattias Jacobsson <2pi@....nu>
---
 tools/perf/util/strbuf.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/tools/perf/util/strbuf.c b/tools/perf/util/strbuf.c
index 9005fbe0780e..23092fd6451d 100644
--- a/tools/perf/util/strbuf.c
+++ b/tools/perf/util/strbuf.c
@@ -109,7 +109,6 @@ static int strbuf_addv(struct strbuf *sb, const char *fmt, va_list ap)
 			return ret;
 		}
 		len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap_saved);
-		va_end(ap_saved);
 		if (len > strbuf_avail(sb)) {
 			pr_debug("this should not happen, your vsnprintf is broken");
 			va_end(ap_saved);
-- 
2.20.1