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linux-yocto/drivers/s390/block
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Dan Williams 7bf7eac8d6 dax: Arrange for dax_supported check to span multiple devices 
Pankaj reports that starting with commit ad428cdb52 "dax: Check the
end of the block-device capacity with dax_direct_access()" device-mapper
no longer allows dax operation. This results from the stricter checks in
__bdev_dax_supported() that validate that the start and end of a
block-device map to the same 'pagemap' instance.

Teach the dax-core and device-mapper to validate the 'pagemap' on a
per-target basis. This is accomplished by refactoring the
bdev_dax_supported() internals into generic_fsdax_supported() which
takes a sector range to validate. Consequently generic_fsdax_supported()
is suitable to be used in a device-mapper ->iterate_devices() callback.
A new ->dax_supported() operation is added to allow composite devices to
split and route upper-level bdev_dax_supported() requests.

Fixes: ad428cdb52 ("dax: Check the end of the block-device...")
Cc: <stable@vger.kernel.org>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reported-by: Pankaj Gupta <pagupta@redhat.com>
Reviewed-by: Pankaj Gupta <pagupta@redhat.com>
Tested-by: Pankaj Gupta <pagupta@redhat.com>
Tested-by: Vaibhav Jain <vaibhav@linux.ibm.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2019-05-20 15:02:08 -07:00
..
dasd_3990_erp.c
dasd_alias.c s390/dasd: fix gcc 8 stringop-truncation warning 2018-07-02 11:24:53 +02:00
dasd_devmap.c s390/dasd,zfcp: fix gcc 8 stringop-truncation warnings 2018-07-02 11:24:52 +02:00
dasd_diag.c s390/dasd: move dasd_ccw_req to per request data 2018-06-12 15:14:19 +02:00
dasd_diag.h
dasd_eckd.c s390/dasd: fix build warning in dasd_eckd_build_cp_raw 2019-05-09 08:10:21 -06:00
dasd_eckd.h
dasd_eer.c s390/dasd,zfcp: fix gcc 8 stringop-truncation warnings 2018-07-02 11:24:52 +02:00
dasd_erp.c
dasd_fba.c s390/dasd: move dasd_ccw_req to per request data 2018-06-12 15:14:19 +02:00
dasd_fba.h
dasd_genhd.c block: genhd: add 'groups' argument to device_add_disk 2018-09-28 08:30:28 -06:00
dasd_int.h s390/dasd: reduce the default queue depth and nr of hardware queues 2018-07-02 11:22:41 +02:00
dasd_ioctl.c dasd: remove dead code 2018-11-07 13:42:32 -07:00
dasd_proc.c s390/drivers: fix proc/debugfs file permissions 2018-12-13 10:42:24 +01:00
dasd.c s390/dasd: fix read device characteristic with CONFIG_VMAP_STACK=y 2019-03-01 16:23:56 +01:00
dcssblk.c dax: Arrange for dax_supported check to span multiple devices 2019-05-20 15:02:08 -07:00
Kconfig dax: introduce CONFIG_DAX_DRIVER 2018-04-03 05:41:19 -07:00
Makefile
scm_blk.c block: genhd: add 'groups' argument to device_add_disk 2018-09-28 08:30:28 -06:00
scm_blk.h
scm_drv.c
xpram.c