[PATCH AUTOSEL for 4.14 101/135] dev/dax: fix uninitialized variable build warning

From: alexander . levin
Date: Thu Dec 07 2017 - 12:54:35 EST


From: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>

[ Upstream commit 0a3ff78699d1817e711441715d22665475466036 ]

Fix this build warning:

warning: 'phys' may be used uninitialized in this function
[-Wuninitialized]

As reported here:

https://lkml.org/lkml/2017/10/16/152
http://kisskb.ellerman.id.au/kisskb/buildresult/13181373/log/

Signed-off-by: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
---
drivers/dax/device.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/dax/device.c b/drivers/dax/device.c
index 375b99bca002..7b0bf825c4e7 100644
--- a/drivers/dax/device.c
+++ b/drivers/dax/device.c
@@ -222,7 +222,8 @@ __weak phys_addr_t dax_pgoff_to_phys(struct dev_dax *dev_dax, pgoff_t pgoff,
unsigned long size)
{
struct resource *res;
- phys_addr_t phys;
+ /* gcc-4.6.3-nolibc for i386 complains that this is uninitialized */
+ phys_addr_t uninitialized_var(phys);
int i;

for (i = 0; i < dev_dax->num_resources; i++) {
--
2.11.0