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From: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
To: Mike Marciniszyn
	<infinipath-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	Sean Hefty <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Hal Rosenstock
	<hal.rosenstock-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
	Dennis Dalessandro
	<dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Harish Chegondi
	<harish.chegondi-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Masahiro Yamada
	<yamada.masahiro-uWyLwvC0a2jby3iVrkZq2A@public.gmane.org>,
	Jubin John <jubin.john-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH] IB/qib: fix false-postive maybe-uninitialized warning
Date: Mon, 27 Feb 2017 21:43:30 +0100	[thread overview]
Message-ID: <20170227204343.3575126-1-arnd@arndb.de> (raw)

aarch64-linux-gcc-7 complains about code it doesn't fully understand:

drivers/infiniband/hw/qib/qib_iba7322.c: In function 'qib_7322_txchk_change':
include/asm-generic/bitops/non-atomic.h:105:35: error: 'shadow' may be used uninitialized in this function [-Werror=maybe-uninitialized]

The code is right, and despite trying hard, I could not come up with a version
that I liked better than just adding a fake initialization here to shut up the
warning.

Fixes: f931551bafe1 ("IB/qib: Add new qib driver for QLogic PCIe InfiniBand adapters")
Signed-off-by: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
---
 drivers/infiniband/hw/qib/qib_iba7322.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/qib/qib_iba7322.c b/drivers/infiniband/hw/qib/qib_iba7322.c
index 12c4208fd701..af9f596bb68b 100644
--- a/drivers/infiniband/hw/qib/qib_iba7322.c
+++ b/drivers/infiniband/hw/qib/qib_iba7322.c
@@ -7068,7 +7068,7 @@ static void qib_7322_txchk_change(struct qib_devdata *dd, u32 start,
 	unsigned long flags;
 
 	while (wait) {
-		unsigned long shadow;
+		unsigned long shadow = 0;
 		int cstart, previ = -1;
 
 		/*
-- 
2.9.0

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WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: Mike Marciniszyn <infinipath@intel.com>,
	Doug Ledford <dledford@redhat.com>,
	Sean Hefty <sean.hefty@intel.com>,
	Hal Rosenstock <hal.rosenstock@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
	Dennis Dalessandro <dennis.dalessandro@intel.com>,
	Ira Weiny <ira.weiny@intel.com>,
	Leon Romanovsky <leon@kernel.org>,
	Harish Chegondi <harish.chegondi@intel.com>,
	Masahiro Yamada <yamada.masahiro@socionext.com>,
	Jubin John <jubin.john@intel.com>,
	linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] IB/qib: fix false-postive maybe-uninitialized warning
Date: Mon, 27 Feb 2017 21:43:30 +0100	[thread overview]
Message-ID: <20170227204343.3575126-1-arnd@arndb.de> (raw)

aarch64-linux-gcc-7 complains about code it doesn't fully understand:

drivers/infiniband/hw/qib/qib_iba7322.c: In function 'qib_7322_txchk_change':
include/asm-generic/bitops/non-atomic.h:105:35: error: 'shadow' may be used uninitialized in this function [-Werror=maybe-uninitialized]

The code is right, and despite trying hard, I could not come up with a version
that I liked better than just adding a fake initialization here to shut up the
warning.

Fixes: f931551bafe1 ("IB/qib: Add new qib driver for QLogic PCIe InfiniBand adapters")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/infiniband/hw/qib/qib_iba7322.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/qib/qib_iba7322.c b/drivers/infiniband/hw/qib/qib_iba7322.c
index 12c4208fd701..af9f596bb68b 100644
--- a/drivers/infiniband/hw/qib/qib_iba7322.c
+++ b/drivers/infiniband/hw/qib/qib_iba7322.c
@@ -7068,7 +7068,7 @@ static void qib_7322_txchk_change(struct qib_devdata *dd, u32 start,
 	unsigned long flags;
 
 	while (wait) {
-		unsigned long shadow;
+		unsigned long shadow = 0;
 		int cstart, previ = -1;
 
 		/*
-- 
2.9.0

             reply	other threads:[~2017-02-27 20:43 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-27 20:43 Arnd Bergmann [this message]
2017-02-27 20:43 ` [PATCH] IB/qib: fix false-postive maybe-uninitialized warning Arnd Bergmann
2017-02-27 21:22 ` Weiny, Ira

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