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block: add a bdev_discard_granularity helper

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Abstract away implementation details from file systems by providing a
block_device based helper to retrieve the discard granularity.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com> [drbd]
Acked-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Acked-by: David Sterba <dsterba@suse.com> [btrfs]
Link: https://lore.kernel.org/r/20220415045258.199825-26-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2022-04-15 06:52:56 +02:00 • committed by Jens Axboe
parent 70200574cc
commit 7b47ef52d0
18 changed files with 38 additions and 47 deletions
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3
fs/fat/file.c
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@ -127,7 +127,6 @@ static int fat_ioctl_fitrim(struct inode *inode, unsigned long arg)
struct super_block *sb = inode->i_sb;
struct fstrim_range __user *user_range;
struct fstrim_range range;
struct request_queue *q = bdev_get_queue(sb->s_bdev);
int err;
if (!capable(CAP_SYS_ADMIN))
@ -141,7 +140,7 @@ static int fat_ioctl_fitrim(struct inode *inode, unsigned long arg)
return -EFAULT;
range.minlen = max_t(unsigned int, range.minlen,
q->limits.discard_granularity);
bdev_discard_granularity(sb->s_bdev));
err = fat_trim_fs(inode, &range);
if (err < 0)