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Added EXT4_LBLK_TO_P() and EXT4_P_TO_LBLK() macros to simplify these conversions and handle both BS <= PS and BS > PS scenarios cleanly. Signed-off-by: Baokun Li Reviewed-by: Zhang Yi --- fs/ext4/ext4.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 9b236f620b3a..8223ed29b343 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -369,6 +369,12 @@ struct ext4_io_submit { (round_up((offset), i_blocksize(inode)) >> (inode)->i_blkbits) #define EXT4_LBLK_TO_B(inode, lblk) ((loff_t)(lblk) << (inode)->i_blkbits) +/* Translate a block number to a page index */ +#define EXT4_LBLK_TO_P(inode, lblk) (EXT4_LBLK_TO_B((inode), (lblk)) >> \ + PAGE_SHIFT) +/* Translate a page index to a block number */ +#define EXT4_P_TO_LBLK(inode, pnum) (((loff_t)(pnum) << PAGE_SHIFT) >> \ + (inode)->i_blkbits) /* Translate a block number to a cluster number */ #define EXT4_B2C(sbi, blk) ((blk) >> (sbi)->s_cluster_bits) /* Translate a cluster number to a block number */ -- 2.46.1