linux-kernel - [PATCH net-next v3 2/3] genetlink: Use string_is

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Date:   Wed,  8 Feb 2023 15:31:52 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Xin Long <lucien.xin@...il.com>, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, dev@...nvswitch.org,
        tipc-discussion@...ts.sourceforge.net
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Pravin B Shelar <pshelar@....org>,
        Jon Maloy <jmaloy@...hat.com>,
        Ying Xue <ying.xue@...driver.com>,
        Simon Horman <simon.horman@...igine.com>
Subject: [PATCH net-next v3 2/3] genetlink: Use string_is_terminated() helper

Use string_is_terminated() helper instead of cpecific memchr() call.
This shows better the intention of the call.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Reviewed-by: Simon Horman <simon.horman@...igine.com>
---
v3: renamed to string_is_terminated (Jakub)
v2: added tag and updated subject (Simon)
 net/netlink/genetlink.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 600993c80050..04c4036bf406 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -13,7 +13,7 @@
 #include <linux/errno.h>
 #include <linux/types.h>
 #include <linux/socket.h>
-#include <linux/string.h>
+#include <linux/string_helpers.h>
 #include <linux/skbuff.h>
 #include <linux/mutex.h>
 #include <linux/bitmap.h>
@@ -457,7 +457,7 @@ static int genl_validate_assign_mc_groups(struct genl_family *family)
 
 		if (WARN_ON(grp->name[0] == '\0'))
 			return -EINVAL;
-		if (WARN_ON(memchr(grp->name, '\0', GENL_NAMSIZ) == NULL))
+		if (WARN_ON(!string_is_terminated(grp->name, GENL_NAMSIZ)))
 			return -EINVAL;
 	}
 
-- 
2.39.1