forked from Minki/linux
ext2: introduce new helper ext2_group_last_block_no()
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: Chengguang Xu <cgxu519@mykernel.net> Signed-off-by: Jan Kara <jack@suse.cz>
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@ -813,6 +813,18 @@ ext2_group_first_block_no(struct super_block *sb, unsigned long group_no)
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le32_to_cpu(EXT2_SB(sb)->s_es->s_first_data_block);
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}
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static inline ext2_fsblk_t
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ext2_group_last_block_no(struct super_block *sb, unsigned long group_no)
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{
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struct ext2_sb_info *sbi = EXT2_SB(sb);
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if (group_no == sbi->s_groups_count - 1)
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return le32_to_cpu(sbi->s_es->s_blocks_count) - 1;
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else
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return ext2_group_first_block_no(sb, group_no) +
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EXT2_BLOCKS_PER_GROUP(sb) - 1;
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}
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#define ext2_set_bit __test_and_set_bit_le
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#define ext2_clear_bit __test_and_clear_bit_le
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#define ext2_test_bit test_bit_le
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