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linux-next/drivers/vhost
Michael S. Tsirkin 0b4a7092ff vhost: fix clang build warning
Clang warns:

  drivers/vhost/vhost.c:2085:5: warning: macro expansion producing
  'defined' has undefined behavior [-Wexpansion-to-defined]
  #if VHOST_ARCH_CAN_ACCEL_UACCESS
      ^
  drivers/vhost/vhost.h:98:38: note: expanded from macro
  'VHOST_ARCH_CAN_ACCEL_UACCESS'
  #define VHOST_ARCH_CAN_ACCEL_UACCESS defined(CONFIG_MMU_NOTIFIER) && \
                                       ^

It's being pedantic for the sake of portability, but the fix is easy
enough.

Rework the definition of VHOST_ARCH_CAN_ACCEL_UACCESS to expand to a constant.

Fixes: 7f466032dc ("vhost: access vq metadata through kernel virtual address")
Link: https://github.com/ClangBuiltLinux/linux/issues/508
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Tested-by: Nathan Chancellor <natechancellor@gmail.com>
2019-06-06 17:32:13 -04:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig.vringh treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
net.c vhost: rename vq_iotlb_prefetch() to vq_meta_prefetch() 2019-06-05 16:23:52 -04:00
scsi.c vhost: scsi: add weight support 2019-05-27 11:08:23 -04:00
test.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
test.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vhost.c vhost: access vq metadata through kernel virtual address 2019-06-05 21:09:18 -04:00
vhost.h vhost: fix clang build warning 2019-06-06 17:32:13 -04:00
vringh.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
vsock.c vhost: vsock: add weight support 2019-05-27 11:08:23 -04:00