gcc correctly warns about an incorrect use of the 'pa' variable
in case we pass an empty scatterlist to __s390_dma_map_sg:
arch/s390/pci/pci_dma.c: In function '__s390_dma_map_sg':
arch/s390/pci/pci_dma.c:309:13: warning: 'pa' may be used uninitialized in this
function [-Wmaybe-uninitialized]
This adds a bogus initialization to the function to sanitize
the debug output. I would have preferred a solution without
the initialization, but I only got the report from the
kbuild bot after turning on the warning again, and didn't
manage to reproduce it myself.
Signed-off-by: Arnd Bergmann <a...@arndb.de>
Acked-by: Sebastian Ott <seb...@linux.vnet.ibm.com>
Acked-by: Martin Schwidefsky <schwidef...@de.ibm.com>
---
arch/s390/pci/pci_dma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c
index 7350c8b..6b2f72f 100644
--- a/arch/s390/pci/pci_dma.c
+++ b/arch/s390/pci/pci_dma.c
@@ -423,7 +423,7 @@ static int __s390_dma_map_sg(struct device *dev, struct
scatterlist *sg,
dma_addr_t dma_addr_base, dma_addr;
int flags = ZPCI_PTE_VALID;
struct scatterlist *s;
- unsigned long pa;
+ unsigned long pa = 0;
int ret;
size = PAGE_ALIGN(size);
--
2.9.0
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