https://github.com/torvalds/linux
Revision 92dfffee974f75c28b0c89f31318669091de1ec3 authored by Arnd Bergmann on 10 November 2016, 16:44:48 UTC, committed by Linus Torvalds on 11 November 2016, 16:45:08 UTC
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 <arnd@arndb.de>
Acked-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 069013a
History
Tip revision: 92dfffee974f75c28b0c89f31318669091de1ec3 authored by Arnd Bergmann on 10 November 2016, 16:44:48 UTC
s390: pci: don't print uninitialized data for debugging
Tip revision: 92dfffe
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