tree cad526094c576b74eb12b0cdb1b497bbb4765128
parent a8a8a669ea13d792296737505adc43ccacf3a648
author Christoph Hellwig <hch@lst.de> 1258802932 +0900
committer OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> 1258803412 +0900

fat: make discard a mount option

Currently shipping discard capable SSDs and arrays have rather sub-optimal
implementations of the command and can the use of it can cause massive
slowdowns.  Make issueing these commands option as it's already in btrfs
and gfs2.

Signed-off-by: Christoph Hellwig <hch@lst.de>
[hirofumi@mail.parknet.co.jp: tweaks, and add "discard" to fat_show_options]
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>