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ext4: remove EXT4_STATE_DIOREAD_LOCK flag

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Commit 16c5468859 ("ext4: Allow parallel DIO reads") reworked the way
locking happens around parallel dio reads. This resulted in obviating
the need for EXT4_STATE_DIOREAD_LOCK flag and accompanying logic.
Currently this amounts to dead code so let's remove it. No functional
changes

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Nikolay Borisov
2018-03-22 11:52:10 -04:00
committed by Theodore Ts'o
parent fe23cb65c2
commit 1d39834fba
6 changed files with 10 additions and 54 deletions
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8
fs/ext4/inode.c
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@@ -4252,7 +4252,6 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length)
}
/* Wait all existing dio workers, newcomers will block on i_mutex */
ext4_inode_block_unlocked_dio(inode);
inode_dio_wait(inode);
/*
@@ -4325,7 +4324,6 @@ out_stop:
ext4_journal_stop(handle);
out_dio:
up_write(&EXT4_I(inode)->i_mmap_sem);
ext4_inode_resume_unlocked_dio(inode);
out_mutex:
inode_unlock(inode);
return ret;
@@ -5507,9 +5505,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
*/
if (orphan) {
if (!ext4_should_journal_data(inode)) {
ext4_inode_block_unlocked_dio(inode);
inode_dio_wait(inode);
ext4_inode_resume_unlocked_dio(inode);
} else
ext4_wait_for_tail_page_commit(inode);
}
@@ -6000,7 +5996,6 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
return -EROFS;
/* Wait for all existing dio workers */
ext4_inode_block_unlocked_dio(inode);
inode_dio_wait(inode);
/*
@@ -6016,7 +6011,6 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
err = filemap_write_and_wait(inode->i_mapping);
if (err < 0) {
up_write(&EXT4_I(inode)->i_mmap_sem);
ext4_inode_resume_unlocked_dio(inode);
return err;
}
}
@@ -6039,7 +6033,6 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
if (err < 0) {
jbd2_journal_unlock_updates(journal);
percpu_up_write(&sbi->s_journal_flag_rwsem);
ext4_inode_resume_unlocked_dio(inode);
return err;
}
ext4_clear_inode_flag(inode, EXT4_INODE_JOURNAL_DATA);
@@ -6051,7 +6044,6 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
if (val)
up_write(&EXT4_I(inode)->i_mmap_sem);
ext4_inode_resume_unlocked_dio(inode);
/* Finally we can mark the inode as dirty. */