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authorNamjae Jeon <linkinjeon@gmail.com>2012-12-18 04:02:56 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-18 05:15:22 +0400
commitf562146a3daf6aa0bbf2a1bc4b6b7da031ed5dcd (patch)
tree18a0b65b13f86a5cf464459fb81744c1431a9c6b /fs/fat
parent6920d996e3fee4ac5dcb7d34cb290b6f67bb69d0 (diff)
downloadlinux-f562146a3daf6aa0bbf2a1bc4b6b7da031ed5dcd.tar.xz
fat: notify when discard is not supported
Change fatfs so that a warning is emitted when an attempt is made to mount a filesystem with the unsupported `discard' option. ext4 aready does this: http://patchwork.ozlabs.org/patch/192668/ Signed-off-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: Amit Sahrawat <amit.sahrawat83@gmail.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/fat')
-rw-r--r--fs/fat/inode.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 5bafaad00530..7b186a5d51b1 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -26,6 +26,7 @@
#include <linux/writeback.h>
#include <linux/log2.h>
#include <linux/hash.h>
+#include <linux/blkdev.h>
#include <asm/unaligned.h>
#include "fat.h"
@@ -1431,6 +1432,14 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat,
goto out_fail;
}
+ if (sbi->options.discard) {
+ struct request_queue *q = bdev_get_queue(sb->s_bdev);
+ if (!blk_queue_discard(q))
+ fat_msg(sb, KERN_WARNING,
+ "mounting with \"discard\" option, but "
+ "the device does not support discard");
+ }
+
return 0;
out_invalid: