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Subject[PATCH 3.10 135/139] IB/qib: fix false-postive maybe-uninitialized warning
From: Arnd Bergmann <>

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

Fixes: f931551bafe1 ("IB/qib: Add new qib driver for QLogic PCIe InfiniBand adapters")
Signed-off-by: Arnd Bergmann <>
Acked-by: Ira Weiny <>
Signed-off-by: Doug Ledford <>
Signed-off-by: Willy Tarreau <>
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 5f5f20f..c61f3e7 100644
--- a/drivers/infiniband/hw/qib/qib_iba7322.c
+++ b/drivers/infiniband/hw/qib/qib_iba7322.c
@@ -6670,7 +6670,7 @@ 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;

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