ext4: remove sb argument from ext4_superblock_csum()

Since ext4_superblock_csum() no longer uses its sb argument, remove it.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Baokun Li <libaokun1@huawei.com>
Link: https://patch.msgid.link/20250513053809.699974-3-ebiggers@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

Author: ebiggers

fs/ext4/ext4.h

@@ -3136,8 +3136,7 @@ extern int ext4_read_bh_lock(struct buffer_head *bh, blk_opf_t op_flags, bool wa
 extern void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block);
 extern int ext4_seq_options_show(struct seq_file *seq, void *offset);
 extern int ext4_calculate_overhead(struct super_block *sb);
-extern __le32 ext4_superblock_csum(struct super_block *sb,
-				   struct ext4_super_block *es);
+extern __le32 ext4_superblock_csum(struct ext4_super_block *es);
 extern void ext4_superblock_csum_set(struct super_block *sb);
 extern int ext4_alloc_flex_bg_array(struct super_block *sb,
 				    ext4_group_t ngroup);

fs/ext4/ioctl.c

@@ -143,15 +143,15 @@ static int ext4_update_backup_sb(struct super_block *sb,
 	es = (struct ext4_super_block *) (bh->b_data + offset);
 	lock_buffer(bh);
 	if (ext4_has_feature_metadata_csum(sb) &&
-	    es->s_checksum != ext4_superblock_csum(sb, es)) {
+	    es->s_checksum != ext4_superblock_csum(es)) {
 		ext4_msg(sb, KERN_ERR, "Invalid checksum for backup "
 		"superblock %llu", sb_block);
 		unlock_buffer(bh);
 		goto out_bh;
 	}
 	func(es, arg);
 	if (ext4_has_feature_metadata_csum(sb))
-		es->s_checksum = ext4_superblock_csum(sb, es);
+		es->s_checksum = ext4_superblock_csum(es);
 	set_buffer_uptodate(bh);
 	unlock_buffer(bh);
 

fs/ext4/resize.c

@@ -1119,7 +1119,7 @@ static inline void ext4_set_block_group_nr(struct super_block *sb, char *data,
 
 	es->s_block_group_nr = cpu_to_le16(group);
 	if (ext4_has_feature_metadata_csum(sb))
-		es->s_checksum = ext4_superblock_csum(sb, es);
+		es->s_checksum = ext4_superblock_csum(es);
 }
 
 /*

fs/ext4/super.c

@@ -286,8 +286,7 @@ static int ext4_verify_csum_type(struct super_block *sb,
 	return es->s_checksum_type == EXT4_CRC32C_CHKSUM;
 }
 
-__le32 ext4_superblock_csum(struct super_block *sb,
-			    struct ext4_super_block *es)
+__le32 ext4_superblock_csum(struct ext4_super_block *es)
 {
 	int offset = offsetof(struct ext4_super_block, s_checksum);
 	__u32 csum;
@@ -303,7 +302,7 @@ static int ext4_superblock_csum_verify(struct super_block *sb,
 	if (!ext4_has_feature_metadata_csum(sb))
 		return 1;
 
-	return es->s_checksum == ext4_superblock_csum(sb, es);
+	return es->s_checksum == ext4_superblock_csum(es);
 }
 
 void ext4_superblock_csum_set(struct super_block *sb)
@@ -313,7 +312,7 @@ void ext4_superblock_csum_set(struct super_block *sb)
 	if (!ext4_has_feature_metadata_csum(sb))
 		return;
 
-	es->s_checksum = ext4_superblock_csum(sb, es);
+	es->s_checksum = ext4_superblock_csum(es);
 }
 
 ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
@@ -5912,7 +5911,7 @@ static struct file *ext4_get_journal_blkdev(struct super_block *sb,
 
 	if ((le32_to_cpu(es->s_feature_ro_compat) &
 	     EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) &&
-	    es->s_checksum != ext4_superblock_csum(sb, es)) {
+	    es->s_checksum != ext4_superblock_csum(es)) {
 		ext4_msg(sb, KERN_ERR, "external journal has corrupt superblock");
 		errno = -EFSCORRUPTED;
 		goto out_bh;