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Date: Wed, 10 Jan 2018 15:38:21 +0100
From: Jan Kara <jack@...e.cz>
To: piaojun <piaojun@...wei.com>
Cc: Jan Kara <jack@...e.cz>, adilger.kernel@...ger.ca, arnd@...db.de,
Ted Tso <tytso@....edu>, linux-ext4@...r.kernel.org
Subject: Re: [PATCH] ext4: use 'sbi' instead of 'EXT4_SB(sb)'
On Wed 10-01-18 19:52:54, piaojun wrote:
> We could use 'sbi' instead of 'EXT4_SB(sb)' to make code more elegant.
>
> Signed-off-by: Jun Piao <piaojun@...wei.com>
Looks good to me. You can add:
Reviewed-by: Jan Kara <jack@...e.cz>
Honza
> ---
> fs/ext4/balloc.c | 4 ++--
> fs/ext4/block_validity.c | 6 +++---
> fs/ext4/ialloc.c | 4 ++--
> fs/ext4/mballoc.c | 14 +++++++-------
> fs/ext4/resize.c | 2 +-
> fs/ext4/super.c | 6 +++---
> 6 files changed, 18 insertions(+), 18 deletions(-)
>
> diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
> index a943e56..f9b3e0a 100644
> --- a/fs/ext4/balloc.c
> +++ b/fs/ext4/balloc.c
> @@ -355,10 +355,10 @@ static ext4_fsblk_t ext4_valid_block_bitmap(struct super_block *sb,
> blk = ext4_inode_table(sb, desc);
> offset = blk - group_first_block;
> next_zero_bit = ext4_find_next_zero_bit(bh->b_data,
> - EXT4_B2C(sbi, offset + EXT4_SB(sb)->s_itb_per_group),
> + EXT4_B2C(sbi, offset + sbi->s_itb_per_group),
> EXT4_B2C(sbi, offset));
> if (next_zero_bit <
> - EXT4_B2C(sbi, offset + EXT4_SB(sb)->s_itb_per_group))
> + EXT4_B2C(sbi, offset + sbi->s_itb_per_group))
> /* bad bitmap for inode tables */
> return blk;
> return 0;
> diff --git a/fs/ext4/block_validity.c b/fs/ext4/block_validity.c
> index bee888e..913061c 100644
> --- a/fs/ext4/block_validity.c
> +++ b/fs/ext4/block_validity.c
> @@ -147,11 +147,11 @@ int ext4_setup_system_zone(struct super_block *sb)
> int ret;
>
> if (!test_opt(sb, BLOCK_VALIDITY)) {
> - if (EXT4_SB(sb)->system_blks.rb_node)
> + if (sbi->system_blks.rb_node)
> ext4_release_system_zone(sb);
> return 0;
> }
> - if (EXT4_SB(sb)->system_blks.rb_node)
> + if (sbi->system_blks.rb_node)
> return 0;
>
> for (i=0; i < ngroups; i++) {
> @@ -173,7 +173,7 @@ int ext4_setup_system_zone(struct super_block *sb)
> }
>
> if (test_opt(sb, DEBUG))
> - debug_print_tree(EXT4_SB(sb));
> + debug_print_tree(sbi);
> return 0;
> }
>
> diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
> index b4267d7..3fd31a3 100644
> --- a/fs/ext4/ialloc.c
> +++ b/fs/ext4/ialloc.c
> @@ -303,7 +303,7 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
> /* Do this BEFORE marking the inode not in use or returning an error */
> ext4_clear_inode(inode);
>
> - es = EXT4_SB(sb)->s_es;
> + es = sbi->s_es;
> if (ino < EXT4_FIRST_INO(sb) || ino > le32_to_cpu(es->s_inodes_count)) {
> ext4_error(sb, "reserved or nonexistent inode %lu", ino);
> goto error_return;
> @@ -1155,7 +1155,7 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir,
> ext4_clear_state_flags(ei); /* Only relevant on 32-bit archs */
> ext4_set_inode_state(inode, EXT4_STATE_NEW);
>
> - ei->i_extra_isize = EXT4_SB(sb)->s_want_extra_isize;
> + ei->i_extra_isize = sbi->s_want_extra_isize;
> ei->i_inline_off = 0;
> if (ext4_has_feature_inline_data(sb))
> ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
> diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
> index d9f8b90..02e16a8 100644
> --- a/fs/ext4/mballoc.c
> +++ b/fs/ext4/mballoc.c
> @@ -769,10 +769,10 @@ void ext4_mb_generate_buddy(struct super_block *sb,
> clear_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &(grp->bb_state));
>
> period = get_cycles() - period;
> - spin_lock(&EXT4_SB(sb)->s_bal_lock);
> - EXT4_SB(sb)->s_mb_buddies_generated++;
> - EXT4_SB(sb)->s_mb_generation_time += period;
> - spin_unlock(&EXT4_SB(sb)->s_bal_lock);
> + spin_lock(&sbi->s_bal_lock);
> + sbi->s_mb_buddies_generated++;
> + sbi->s_mb_generation_time += period;
> + spin_unlock(&sbi->s_bal_lock);
> }
>
> static void mb_regenerate_buddy(struct ext4_buddy *e4b)
> @@ -1459,7 +1459,7 @@ static void mb_free_blocks(struct inode *inode, struct ext4_buddy *e4b,
> ext4_fsblk_t blocknr;
>
> blocknr = ext4_group_first_block_no(sb, e4b->bd_group);
> - blocknr += EXT4_C2B(EXT4_SB(sb), block);
> + blocknr += EXT4_C2B(sbi, block);
> ext4_grp_locked_error(sb, e4b->bd_group,
> inode ? inode->i_ino : 0,
> blocknr,
> @@ -4850,9 +4850,9 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode,
> if (in_range(ext4_block_bitmap(sb, gdp), block, count) ||
> in_range(ext4_inode_bitmap(sb, gdp), block, count) ||
> in_range(block, ext4_inode_table(sb, gdp),
> - EXT4_SB(sb)->s_itb_per_group) ||
> + sbi->s_itb_per_group) ||
> in_range(block + count - 1, ext4_inode_table(sb, gdp),
> - EXT4_SB(sb)->s_itb_per_group)) {
> + sbi->s_itb_per_group)) {
>
> ext4_error(sb, "Freeing blocks in system zone - "
> "Block = %llu, count = %lu", block, count);
> diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
> index 50443bd..b6bec27 100644
> --- a/fs/ext4/resize.c
> +++ b/fs/ext4/resize.c
> @@ -1477,7 +1477,7 @@ static int ext4_flex_group_add(struct super_block *sb,
> goto exit_journal;
>
> group = flex_gd->groups[0].group;
> - BUG_ON(group != EXT4_SB(sb)->s_groups_count);
> + BUG_ON(group != sbi->s_groups_count);
> err = ext4_add_new_descs(handle, sb, group,
> resize_inode, flex_gd->count);
> if (err)
> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
> index 0556cd0..165f564 100644
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -2676,7 +2676,7 @@ static ext4_fsblk_t descriptor_loc(struct super_block *sb,
> * compensate.
> */
> if (sb->s_blocksize == 1024 && nr == 0 &&
> - le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0)
> + le32_to_cpu(sbi->s_es->s_first_data_block) == 0)
> has_super++;
>
> return (has_super + ext4_group_first_block_no(sb, bg));
> @@ -3121,7 +3121,7 @@ int ext4_register_li_request(struct super_block *sb,
> {
> struct ext4_sb_info *sbi = EXT4_SB(sb);
> struct ext4_li_request *elr = NULL;
> - ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;
> + ext4_group_t ngroups = sbi->s_groups_count;
> int ret = 0;
>
> mutex_lock(&ext4_li_mtx);
> @@ -4836,7 +4836,7 @@ static int ext4_sync_fs(struct super_block *sb, int wait)
> bool needs_barrier = false;
> struct ext4_sb_info *sbi = EXT4_SB(sb);
>
> - if (unlikely(ext4_forced_shutdown(EXT4_SB(sb))))
> + if (unlikely(ext4_forced_shutdown(sbi)))
> return 0;
>
> trace_ext4_sync_fs(sb, wait);
> --
--
Jan Kara <jack@...e.com>
SUSE Labs, CR
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