ext4: rename s_journal_flag_rwsem to s_writepages_rwsem

commit bbd55937de8f2754adc5792b0f8e5ff7d9c0420e upstream.

In preparation for making s_journal_flag_rwsem synchronize
ext4_writepages() with changes to both the EXTENTS and JOURNAL_DATA
flags (rather than just JOURNAL_DATA as it does currently), rename it to
s_writepages_rwsem.

Link: https://lore.kernel.org/r/20200219183047.47417-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index ae73636a0f9b04fc7c1f3c5efc8b8ac34de7bd10..580c32c4e4e475a567cd35f7c0babadcbe388866 100644 (file)
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1554,7 +1554,7 @@ struct ext4_sb_info {
        struct ratelimit_state s_msg_ratelimit_state;
 
        /* Barrier between changing inodes' journal flags and writepages ops. */
-       struct percpu_rw_semaphore s_journal_flag_rwsem;
+       struct percpu_rw_semaphore s_writepages_rwsem;
        struct dax_device *s_daxdev;
 };
 

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 74fb1bc30ff3661a32258c574e617a36024ad6e3..74a941e920cf2b3ea88e076ade840e583c70f39f 100644 (file)
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2627,7 +2627,7 @@ static int ext4_writepages(struct address_space *mapping,
        if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb))))
                return -EIO;
 
-       percpu_down_read(&sbi->s_journal_flag_rwsem);
+       percpu_down_read(&sbi->s_writepages_rwsem);
        trace_ext4_writepages(inode, wbc);
 
        /*
@@ -2848,7 +2848,7 @@ unplug:
 out_writepages:
        trace_ext4_writepages_result(inode, wbc, ret,
                                     nr_to_write - wbc->nr_to_write);
-       percpu_up_read(&sbi->s_journal_flag_rwsem);
+       percpu_up_read(&sbi->s_writepages_rwsem);
        return ret;
 }
 
@@ -2863,13 +2863,13 @@ static int ext4_dax_writepages(struct address_space *mapping,
        if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb))))
                return -EIO;
 
-       percpu_down_read(&sbi->s_journal_flag_rwsem);
+       percpu_down_read(&sbi->s_writepages_rwsem);
        trace_ext4_writepages(inode, wbc);
 
        ret = dax_writeback_mapping_range(mapping, inode->i_sb->s_bdev, wbc);
        trace_ext4_writepages_result(inode, wbc, ret,
                                     nr_to_write - wbc->nr_to_write);
-       percpu_up_read(&sbi->s_journal_flag_rwsem);
+       percpu_up_read(&sbi->s_writepages_rwsem);
        return ret;
 }
 
@@ -5830,7 +5830,7 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
                }
        }
 
-       percpu_down_write(&sbi->s_journal_flag_rwsem);
+       percpu_down_write(&sbi->s_writepages_rwsem);
        jbd2_journal_lock_updates(journal);
 
        /*
@@ -5847,7 +5847,7 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
                err = jbd2_journal_flush(journal);
                if (err < 0) {
                        jbd2_journal_unlock_updates(journal);
-                       percpu_up_write(&sbi->s_journal_flag_rwsem);
+                       percpu_up_write(&sbi->s_writepages_rwsem);
                        return err;
                }
                ext4_clear_inode_flag(inode, EXT4_INODE_JOURNAL_DATA);
@@ -5855,7 +5855,7 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
        ext4_set_aops(inode);
 
        jbd2_journal_unlock_updates(journal);
-       percpu_up_write(&sbi->s_journal_flag_rwsem);
+       percpu_up_write(&sbi->s_writepages_rwsem);
 
        if (val)
                up_write(&EXT4_I(inode)->i_mmap_sem);

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index f1891e02a3a365737e386503bf0edfcf1774202d..12806be10a182c147548a76a8d9b78a40b31c6e3 100644 (file)
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1018,7 +1018,7 @@ static void ext4_put_super(struct super_block *sb)
        percpu_counter_destroy(&sbi->s_freeinodes_counter);
        percpu_counter_destroy(&sbi->s_dirs_counter);
        percpu_counter_destroy(&sbi->s_dirtyclusters_counter);
-       percpu_free_rwsem(&sbi->s_journal_flag_rwsem);
+       percpu_free_rwsem(&sbi->s_writepages_rwsem);
 #ifdef CONFIG_QUOTA
        for (i = 0; i < EXT4_MAXQUOTAS; i++)
                kfree(get_qf_name(sb, sbi, i));
@@ -4581,7 +4581,7 @@ no_journal:
                err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0,
                                          GFP_KERNEL);
        if (!err)
-               err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem);
+               err = percpu_init_rwsem(&sbi->s_writepages_rwsem);
 
        if (err) {
                ext4_msg(sb, KERN_ERR, "insufficient memory");
@@ -4681,7 +4681,7 @@ failed_mount6:
        percpu_counter_destroy(&sbi->s_freeinodes_counter);
        percpu_counter_destroy(&sbi->s_dirs_counter);
        percpu_counter_destroy(&sbi->s_dirtyclusters_counter);
-       percpu_free_rwsem(&sbi->s_journal_flag_rwsem);
+       percpu_free_rwsem(&sbi->s_writepages_rwsem);
 failed_mount5:
        ext4_ext_release(sb);
        ext4_release_system_zone(sb);