bdi: remove BDI_CAP_SYNCHRONOUS_IO

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BDI_CAP_SYNCHRONOUS_IO is only checked in the swap code, and used to
decided if ->rw_page can be used on a block device.  Just check up for
the method instead.  The only complication is that zram needs a second
set of block_device_operations as it can switch between modes that
actually support ->rw_page and those who don't.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

...

This commit is contained in:

Christoph Hellwig 2020-09-24 08:51:36 +02:00 • committed by Jens Axboe

parent ed7b6b4f6e

commit a8b456d01c

6 changed files with 14 additions and 20 deletions

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1

drivers/block/brd.c

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19

drivers/block/zram/zram_drv.c

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2

drivers/nvdimm/btt.c

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1

drivers/nvdimm/pmem.c

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9

include/linux/backing-dev.h

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2

mm/swapfile.c

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