diff mbox series

[20/29] ext4: cleanup the dax handling in ext4_fill_super

Message ID 20211109083309.584081-21-hch@lst.de (mailing list archive)
State New, archived
Headers show
Series [01/29] nvdimm/pmem: move dax_attribute_group from dax to pmem | expand

Commit Message

Christoph Hellwig Nov. 9, 2021, 8:33 a.m. UTC 
Only call fs_dax_get_by_bdev once the sbi has been allocated and remove
the need for the dax_dev local variable.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/ext4/super.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

Comments

Dan Williams Nov. 23, 2021, 9:49 p.m. UTC | #1 
On Tue, Nov 9, 2021 at 12:34 AM Christoph Hellwig <hch@lst.de> wrote:
>
> Only call fs_dax_get_by_bdev once the sbi has been allocated and remove
> the need for the dax_dev local variable.

Looks good.

Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Darrick J. Wong Nov. 23, 2021, 10:54 p.m. UTC | #2 
On Tue, Nov 09, 2021 at 09:33:00AM +0100, Christoph Hellwig wrote:
> Only call fs_dax_get_by_bdev once the sbi has been allocated and remove
> the need for the dax_dev local variable.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  fs/ext4/super.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
> index eb4df43abd76e..b60401bb1c310 100644
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -3879,7 +3879,6 @@ static void ext4_setup_csum_trigger(struct super_block *sb,
>  
>  static int ext4_fill_super(struct super_block *sb, void *data, int silent)
>  {
> -	struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev);
>  	char *orig_data = kstrdup(data, GFP_KERNEL);
>  	struct buffer_head *bh, **group_desc;
>  	struct ext4_super_block *es = NULL;
> @@ -3910,12 +3909,12 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
>  	if ((data && !orig_data) || !sbi)
>  		goto out_free_base;
>  
> -	sbi->s_daxdev = dax_dev;
>  	sbi->s_blockgroup_lock =
>  		kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
>  	if (!sbi->s_blockgroup_lock)
>  		goto out_free_base;
>  
> +	sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev);
>  	sb->s_fs_info = sbi;
>  	sbi->s_sb = sb;
>  	sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS;
> @@ -4300,7 +4299,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
>  		goto failed_mount;
>  	}
>  
> -	if (dax_dev) {
> +	if (sbi->s_daxdev) {
>  		if (blocksize == PAGE_SIZE)
>  			set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags);
>  		else
> @@ -5096,10 +5095,10 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
>  out_fail:
>  	sb->s_fs_info = NULL;
>  	kfree(sbi->s_blockgroup_lock);
> +	fs_put_dax(sbi->s_daxdev );

Nit: no space before the paren  ^ here.

With that fixed,
Reviewed-by: Darrick J. Wong <djwong@kernel.org>

--D

>  out_free_base:
>  	kfree(sbi);
>  	kfree(orig_data);
> -	fs_put_dax(dax_dev);
>  	return err ? err : ret;
>  }
>  
> -- 
> 2.30.2
>
Christoph Hellwig Nov. 24, 2021, 6:53 a.m. UTC | #3 
On Tue, Nov 23, 2021 at 02:54:30PM -0800, Darrick J. Wong wrote:
> Nit: no space before the paren  ^ here.

Fixed.
diff mbox series

Patch

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index eb4df43abd76e..b60401bb1c310 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3879,7 +3879,6 @@  static void ext4_setup_csum_trigger(struct super_block *sb,
 
 static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 {
-	struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev);
 	char *orig_data = kstrdup(data, GFP_KERNEL);
 	struct buffer_head *bh, **group_desc;
 	struct ext4_super_block *es = NULL;
@@ -3910,12 +3909,12 @@  static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	if ((data && !orig_data) || !sbi)
 		goto out_free_base;
 
-	sbi->s_daxdev = dax_dev;
 	sbi->s_blockgroup_lock =
 		kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
 	if (!sbi->s_blockgroup_lock)
 		goto out_free_base;
 
+	sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev);
 	sb->s_fs_info = sbi;
 	sbi->s_sb = sb;
 	sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS;
@@ -4300,7 +4299,7 @@  static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 		goto failed_mount;
 	}
 
-	if (dax_dev) {
+	if (sbi->s_daxdev) {
 		if (blocksize == PAGE_SIZE)
 			set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags);
 		else
@@ -5096,10 +5095,10 @@  static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 out_fail:
 	sb->s_fs_info = NULL;
 	kfree(sbi->s_blockgroup_lock);
+	fs_put_dax(sbi->s_daxdev );
 out_free_base:
 	kfree(sbi);
 	kfree(orig_data);
-	fs_put_dax(dax_dev);
 	return err ? err : ret;
 }