linux-kernel - [PATCH] tools lib traceevent: fix an incorrect comparison with the literal "s64"

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Message-Id: <20171127161909.15565-1-colin.king@canonical.com>
Date:   Mon, 27 Nov 2017 16:19:09 +0000
From:   Colin King <colin.king@...onical.com>
To:     Arnaldo Carvalho de Melo <acme@...hat.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        "David S . Miller" <davem@...emloft.net>,
        Daniel Borkmann <daniel@...earbox.net>
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] tools lib traceevent: fix an incorrect comparison with the literal "s64"

From: Colin Ian King <colin.king@...onical.com>

I believe the comparison of the string 'type' with the literal string
"s64" is currently incorrect, it is missing a == 0 comparison as per
the other comparisons.

Detected by cppcheck:
tools/lib/traceevent/event-parse.c:2209: (warning) The comparison
operator in 'strcmp(type,"s64") != 0' should maybe be '==' instead,
currently the expression 'strcmp(type,"u64") == 0' is redundant.

Fixes: f7d82350e597 ("tools/events: Add files to create libtraceevent.a")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 tools/lib/traceevent/event-parse.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 7ce724fc0544..82b6c64c5b39 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -2206,7 +2206,7 @@ eval_type_str(unsigned long long val, const char *type, int pointer)
 		return val & 0xffffffff;
 
 	if (strcmp(type, "u64") == 0 ||
-	    strcmp(type, "s64"))
+	    strcmp(type, "s64") == 0)
 		return val;
 
 	if (strcmp(type, "s8") == 0)
-- 
2.14.1