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Date: Wed, 19 Feb 2020 10:30:46 -0800
From: Eric Biggers <ebiggers@...nel.org>
To: linux-ext4@...r.kernel.org, Theodore Ts'o <tytso@....edu>
Cc: Jan Kara <jack@...e.cz>
Subject: [PATCH v3 1/2] ext4: rename s_journal_flag_rwsem to s_writepages_rwsem
From: Eric Biggers <ebiggers@...gle.com>
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.
Signed-off-by: Eric Biggers <ebiggers@...gle.com>
---
fs/ext4/ext4.h | 2 +-
fs/ext4/inode.c | 14 +++++++-------
fs/ext4/super.c | 6 +++---
3 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 4441331d06cc4..487a7b430b9dd 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1553,7 +1553,7 @@ 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;
#ifdef CONFIG_EXT4_DEBUG
unsigned long s_simulate_fail;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index c04a15fc8b6ad..f49c48ea2f170 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2628,7 +2628,7 @@ 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);
/*
@@ -2849,7 +2849,7 @@ static int ext4_writepages(struct address_space *mapping,
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;
}
@@ -2864,13 +2864,13 @@ 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;
}
@@ -5861,7 +5861,7 @@ 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);
/*
@@ -5878,7 +5878,7 @@ 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);
@@ -5886,7 +5886,7 @@ 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 b0b9150c97735..feb59c7ad395f 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1054,7 +1054,7 @@ 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));
@@ -4600,7 +4600,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
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");
@@ -4694,7 +4694,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
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);
base-commit: c96dceeabf765d0b1b1f29c3bf50a5c01315b820
--
2.25.0
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