tag 4dbd4e84df9b2d5c9c2bb48c06d7b5782549ab27
tagger Vasily Gorbik <gor@linux.ibm.com> Sat Oct 12 11:57:30 2019 +0200
object 062795fcdcb2d22822fb42644b1d76a8ad8439b3

s390 updates for 5.4-rc3

- Fix virtio-ccw DMA regression.

- Fix compiler warnings in uaccess.

commit 062795fcdcb2d22822fb42644b1d76a8ad8439b3
author Christian Borntraeger <borntraeger@de.ibm.com> Tue Oct 08 17:02:32 2019 +0200
committer Vasily Gorbik <gor@linux.ibm.com> Fri Oct 11 12:27:25 2019 +0200
tree 30b8771f4c086abd7c48e7b6de02e110758bf8e2
parent 05668e1d74b84c53fbe0f28565e4c9502a6b8a67

s390/uaccess: avoid (false positive) compiler warnings

Depending on inlining decisions by the compiler, __get/put_user_fn
might become out of line. Then the compiler is no longer able to tell
that size can only be 1,2,4 or 8 due to the check in __get/put_user
resulting in false positives like

./arch/s390/include/asm/uaccess.h: In function ‘__put_user_fn’:
./arch/s390/include/asm/uaccess.h:113:9: warning: ‘rc’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  113 |  return rc;
      |         ^~
./arch/s390/include/asm/uaccess.h: In function ‘__get_user_fn’:
./arch/s390/include/asm/uaccess.h:143:9: warning: ‘rc’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  143 |  return rc;
      |         ^~

These functions are supposed to be always inlined. Mark it as such.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>