Patch "IB/qib: fix false-postive maybe-uninitialized warning" has been added to the 3.18-stable tree

Patch "IB/qib: fix false-postive maybe-uninitialized warning" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    IB/qib: fix false-postive maybe-uninitialized warning

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ib-qib-fix-false-postive-maybe-uninitialized-warning.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From f6aafac184a3e46e919769dd4faa8bf0dc436534 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Tue, 14 Mar 2017 13:18:45 +0100
Subject: IB/qib: fix false-postive maybe-uninitialized warning

From: Arnd Bergmann <arnd@arndb.de>

commit f6aafac184a3e46e919769dd4faa8bf0dc436534 upstream.

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>
Acked-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/infiniband/hw/qib/qib_iba7322.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/hw/qib/qib_iba7322.c
+++ b/drivers/infiniband/hw/qib/qib_iba7322.c
@@ -7078,7 +7078,7 @@ static void qib_7322_txchk_change(struct
 	unsigned long flags;
 
 	while (wait) {
-		unsigned long shadow;
+		unsigned long shadow = 0;
 		int cstart, previ = -1;
 
 		/*


Patches currently in stable-queue which might be from arnd@arndb.de are

queue-3.18/ttpci-address-stringop-overflow-warning.patch
queue-3.18/ib-qib-fix-false-postive-maybe-uninitialized-warning.patch
queue-3.18/alsa-au88x0-avoid-theoretical-uninitialized-access.patch