ext4: use saved local variable sbi instead of EXT4_SB(sb)

We save EXT4_SB(sb) to local variable sbi at beginning of function
ext4_resize_begin. Use sbi directly instead of EXT4_SB(sb) to
remove unnecessary pointer dereference.

Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Link: https://lore.kernel.org/r/20230826174712.4059355-11-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index d4ab2cde0a032c0a17dd1f369066df277be5c669..e2c81b589de8b5e3e7372fb29a50803574694f4d 100644 (file)
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -55,7 +55,7 @@ int ext4_resize_begin(struct super_block *sb)
         * If the reserved GDT blocks is non-zero, the resize_inode feature
         * should always be set.
         */
-       if (EXT4_SB(sb)->s_es->s_reserved_gdt_blocks &&
+       if (sbi->s_es->s_reserved_gdt_blocks &&
            !ext4_has_feature_resize_inode(sb)) {
                ext4_error(sb, "resize_inode disabled but reserved GDT blocks non-zero");
                return -EFSCORRUPTED;
@@ -67,9 +67,9 @@ int ext4_resize_begin(struct super_block *sb)
          * bad time to do it anyways.
          */
        if (EXT4_B2C(sbi, sbi->s_sbh->b_blocknr) !=
-           le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block)) {
+           le32_to_cpu(sbi->s_es->s_first_data_block)) {
                ext4_warning(sb, "won't resize using backup superblock at %llu",
-                       (unsigned long long)EXT4_SB(sb)->s_sbh->b_blocknr);
+                       (unsigned long long)sbi->s_sbh->b_blocknr);
                return -EPERM;
        }
 
@@ -77,7 +77,7 @@ int ext4_resize_begin(struct super_block *sb)
         * We are not allowed to do online-resizing on a filesystem mounted
         * with error, because it can destroy the filesystem easily.
         */
-       if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) {
+       if (sbi->s_mount_state & EXT4_ERROR_FS) {
                ext4_warning(sb, "There are errors in the filesystem, "
                             "so online resizing is not allowed");
                return -EPERM;
@@ -89,7 +89,7 @@ int ext4_resize_begin(struct super_block *sb)
        }
 
        if (test_and_set_bit_lock(EXT4_FLAGS_RESIZING,
-                                 &EXT4_SB(sb)->s_ext4_flags))
+                                 &sbi->s_ext4_flags))
                ret = -EBUSY;
 
        return ret;