brd: remove support for BLKFLSBUF

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Discontinue having the brd driver destructively free all pages in the
ramdisk in response to the BLKFLSBUF ioctl.  Doing so allows a BLKFLSBUF
ioctl issued to a logical partition to destroy pages of the parent brd
device (and all other partitions of that brd device).

This change breaks compatibility - but in this case the compatibility
breaks more than it helps.

Reported-by: Mikulas Patocka <mpatocka@redhat.com>
Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

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Mike Snitzer 2016-10-25 08:46:23 -06:00 • committed by Jens Axboe

parent 366f4aea64

commit ff26956875

1 changed files with 0 additions and 35 deletions

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drivers/block/brd.c

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