ext2: introduce new helper ext2_group_last_block_no() (eb9e47fc) · Commits · 戴 / test

Introduce new helper ext2_group_last_block_no() to calculate last block num for specific block group, we can replace open coded logic by calling this common helper. Link: https://lore.kernel.org/r/20191104114036.9893-1-cgxu519@mykernel.net Signed-off-by:

fs/ext2/ext2.h

+12 −0

Original line number	Diff line number	Diff line
		@@ -813,6 +813,18 @@ ext2_group_first_block_no(struct super_block *sb, unsigned long group_no)
		le32_to_cpu(EXT2_SB(sb)->s_es->s_first_data_block);
		}

		static inline ext2_fsblk_t
		ext2_group_last_block_no(struct super_block *sb, unsigned long group_no)
		{
		struct ext2_sb_info *sbi = EXT2_SB(sb);

		if (group_no == sbi->s_groups_count - 1)
		return le32_to_cpu(sbi->s_es->s_blocks_count) - 1;
		else
		return ext2_group_first_block_no(sb, group_no) +
		EXT2_BLOCKS_PER_GROUP(sb) - 1;
		}

		#define ext2_set_bit __test_and_set_bit_le
		#define ext2_clear_bit __test_and_clear_bit_le
		#define ext2_test_bit test_bit_le