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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Nathan Chancellor <natechancellor@gmail.com>,
	"David S . Miller" <davem@davemloft.net>,
	Sasha Levin <sashal@kernel.org>,
	netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.14 34/34] isdn: avm: Fix string plus integer warning from Clang
Date: Tue, 12 Feb 2019 21:39:52 -0500	[thread overview]
Message-ID: <20190213023952.21311-34-sashal@kernel.org> (raw)
In-Reply-To: <20190213023952.21311-1-sashal@kernel.org>

From: Nathan Chancellor <natechancellor@gmail.com>

[ Upstream commit 7afa81c55fca0cad589722cb4bce698b4803b0e1 ]

A recent commit in Clang expanded the -Wstring-plus-int warning, showing
some odd behavior in this file.

drivers/isdn/hardware/avm/b1.c:426:30: warning: adding 'int' to a string does not append to the string [-Wstring-plus-int]
                cinfo->version[j] = "\0\0" + 1;
                                    ~~~~~~~^~~
drivers/isdn/hardware/avm/b1.c:426:30: note: use array indexing to silence this warning
                cinfo->version[j] = "\0\0" + 1;
                                           ^
                                    &      [  ]
1 warning generated.

This is equivalent to just "\0". Nick pointed out that it is smarter to
use "" instead of "\0" because "" is used elsewhere in the kernel and
can be deduplicated at the linking stage.

Link: https://github.com/ClangBuiltLinux/linux/issues/309
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/isdn/hardware/avm/b1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/isdn/hardware/avm/b1.c b/drivers/isdn/hardware/avm/b1.c
index b1833d08a5fe..40a099f33bfc 100644
--- a/drivers/isdn/hardware/avm/b1.c
+++ b/drivers/isdn/hardware/avm/b1.c
@@ -423,7 +423,7 @@ void b1_parse_version(avmctrl_info *cinfo)
 	int i, j;
 
 	for (j = 0; j < AVM_MAXVERSION; j++)
-		cinfo->version[j] = "\0\0" + 1;
+		cinfo->version[j] = "";
 	for (i = 0, j = 0;
 	     j < AVM_MAXVERSION && i < cinfo->versionlen;
 	     j++, i += cinfo->versionbuf[i] + 1)
-- 
2.19.1


      parent reply	other threads:[~2019-02-13  2:46 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20190213023952.21311-1-sashal@kernel.org>
2019-02-13  2:39 ` [PATCH AUTOSEL 4.14 13/34] qed: Fix qed_chain_set_prod() for PBL chains with non power of 2 page count Sasha Levin
2019-02-13  2:39 ` [PATCH AUTOSEL 4.14 14/34] qed: Fix qed_ll2_post_rx_buffer_notify_fw() by adding a write memory barrier Sasha Levin
2019-02-13  2:39 ` [PATCH AUTOSEL 4.14 15/34] net: hns: Fix use after free identified by SLUB debug Sasha Levin
2019-02-13  2:39 ` [PATCH AUTOSEL 4.14 17/34] netfilter: nf_tables: fix leaking object reference count Sasha Levin
2019-02-13  2:39 ` [PATCH AUTOSEL 4.14 21/34] bpf: correctly set initial window on active Fast Open sender Sasha Levin
2019-02-13  2:39 ` [PATCH AUTOSEL 4.14 22/34] net: stmmac: Fix PCI module removal leak Sasha Levin
2019-02-13  2:39 ` [PATCH AUTOSEL 4.14 23/34] isdn: i4l: isdn_tty: Fix some concurrency double-free bugs Sasha Levin
2019-02-13  2:39 ` [PATCH AUTOSEL 4.14 28/34] atm: he: fix sign-extension overflow on large shift Sasha Levin
2019-02-13  2:39 ` [PATCH AUTOSEL 4.14 31/34] bpf: bpf_setsockopt: reset sock dst on SO_MARK changes Sasha Levin
2019-02-13  2:39 ` [PATCH AUTOSEL 4.14 32/34] mlxsw: spectrum_switchdev: Do not treat static FDB entries as sticky Sasha Levin
2019-02-13  2:39 ` [PATCH AUTOSEL 4.14 33/34] net/mlx5e: Fix wrong (zero) TX drop counter indication for representor Sasha Levin
2019-02-13  2:39 ` Sasha Levin [this message]

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