linux-hardening - [PATCH] gcc-plugins: use swap() to make code cleaner

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Message-Id: <20211028003526.7117-1-yang.guang5@zte.com.cn>
Date:   Thu, 28 Oct 2021 00:35:26 +0000
From:   Yang Guang <cgel.zte@...il.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Yang Guang <yang.guang5@....com.cn>,
        Zeal Robot <zealci@....com.cn>,
        linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] gcc-plugins: use swap() to make code cleaner

Using swap() make it more readable.

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Yang Guang <yang.guang5@....com.cn>
---
 scripts/gcc-plugins/randomize_layout_plugin.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/scripts/gcc-plugins/randomize_layout_plugin.c b/scripts/gcc-plugins/randomize_layout_plugin.c
index 334741a31d0a..feee5ba8fa2b 100644
--- a/scripts/gcc-plugins/randomize_layout_plugin.c
+++ b/scripts/gcc-plugins/randomize_layout_plugin.c
@@ -244,11 +244,8 @@ static void full_shuffle(tree *newtree, unsigned long length, ranctx *prng_state
 	unsigned long i, randnum;
 
 	for (i = length - 1; i > 0; i--) {
-		tree tmp;
 		randnum = ranval(prng_state) % (i + 1);
-		tmp = newtree[i];
-		newtree[i] = newtree[randnum];
-		newtree[randnum] = tmp;
+		swap(newtree[i], newtree[randnum]);
 	}
 }
 
-- 
2.30.2