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(parent: 2e9ee09) | patch
dax: check synchronous mapping is supported
authorPankaj Gupta <pagupta@redhat.com>
Fri, 5 Jul 2019 14:03:26 +0000 (19:33 +0530)
committerDan Williams <dan.j.williams@intel.com>
Fri, 5 Jul 2019 22:19:10 +0000 (15:19 -0700)
commit32de1484648a837db5dea0a7007fe7136804e392
tree268cebd1e247ac532948188ceab4bed7c903b18ctree | snapshot
parent2e9ee0955d3c2d3db56aa02ba6f948ba35d5e9c1commit | diff
dax: check synchronous mapping is supported

This patch introduces 'daxdev_mapping_supported' helper
which checks if 'MAP_SYNC' is supported with filesystem
mapping. It also checks if corresponding dax_device is
synchronous. Virtio pmem device is asynchronous and
does not not support VM_SYNC.

Suggested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Pankaj Gupta <pagupta@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
include/linux/dax.h diff | blob | history
Domain: System / Kernel;