From 0a0624a26f9ceb8aae16882d87dc3b12f17f4a49 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Mon, 27 Sep 2021 15:16:11 +0200
Subject: [PATCH] thunderbolt: Fix -Wrestrict warning
Git-commit: 0a0624a26f9ceb8aae16882d87dc3b12f17f4a49
References: jsc#SLE-19438
Patch-mainline: v5.16-rc1
gcc-11 warns when building with W=1:
drivers/thunderbolt/xdomain.c: In function 'modalias_show':
drivers/thunderbolt/xdomain.c:733:16: error: 'sprintf' argument 3 overlaps destination object 'buf' [-Werror=restrict]
733 | return sprintf(buf, "%s\n", buf);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
drivers/thunderbolt/xdomain.c:727:36: note: destination object referenced by 'restrict'-qualified argument 1 was declared here
727 | char *buf)
| ~~~~~~^~~
There is no need for the sprintf() here when a strcat() does
the same thing.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
drivers/thunderbolt/xdomain.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/thunderbolt/xdomain.c b/drivers/thunderbolt/xdomain.c
index d66ea4d616fd..eff32499610f 100644
--- a/drivers/thunderbolt/xdomain.c
+++ b/drivers/thunderbolt/xdomain.c
@@ -730,7 +730,7 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
/* Full buffer size except new line and null termination */
get_modalias(svc, buf, PAGE_SIZE - 2);
- return sprintf(buf, "%s\n", buf);
+ return strlen(strcat(buf, "\n"));
}
static DEVICE_ATTR_RO(modalias);
--
2.26.2