ext4_get_block
int ext4_get_block(struct inode *inode, sector_t iblock,
ext4_get_block);
ext4_get_block);
ext4_get_block(inode, iblock, bh, 0);
get_block_t *get_block = ext4_get_block;
int err = ext4_get_block(inode, block, bh, 0);
ret = ext4_get_block(inode, block, bh, 0);
block_read_full_folio(folio, ext4_get_block);