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btrfs: cleanup local variables in btrfs_file_write_iter

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First replace all inode instances with a pointer to btrfs_inode. This
removes multiple invocations of the BTRFS_I macro, subsequently remove
2 local variables as they are called only once and simply refer to
them directly.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2020-12-10 10:38:32 +02:00 committed by David Sterba
parent 3cc64e7ebf
commit 149716570b
1 changed files with 7 additions and 9 deletions
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16
fs/btrfs/file.c
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@ -1997,9 +1997,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_inode *inode = BTRFS_I(file_inode(file));
ssize_t num_written = 0;
const bool sync = iocb->ki_flags & IOCB_DSYNC;
@ -2008,7 +2006,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
* have opened a file as writable, we have to stop this write operation
* to ensure consistency.
*/
if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state))
if (test_bit(BTRFS_FS_STATE_ERROR, &inode->root->fs_info->fs_state))
return -EROFS;
if (!(iocb->ki_flags & IOCB_DIRECT) &&
@ -2016,7 +2014,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
return -EOPNOTSUPP;
if (sync)
atomic_inc(&BTRFS_I(inode)->sync_writers);
atomic_inc(&inode->sync_writers);
if (iocb->ki_flags & IOCB_DIRECT)
num_written = btrfs_direct_write(iocb, from);
@ -2028,14 +2026,14 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
* otherwise subsequent syncs to a file that's been synced in this
* transaction will appear to have already occurred.
*/
spin_lock(&BTRFS_I(inode)->lock);
BTRFS_I(inode)->last_sub_trans = root->log_transid;
spin_unlock(&BTRFS_I(inode)->lock);
spin_lock(&inode->lock);
inode->last_sub_trans = inode->root->log_transid;
spin_unlock(&inode->lock);
if (num_written > 0)
num_written = generic_write_sync(iocb, num_written);
if (sync)
atomic_dec(&BTRFS_I(inode)->sync_writers);
atomic_dec(&inode->sync_writers);
current->backing_dev_info = NULL;
return num_written;