ext4: add explicit casts when masking cluster sizes

[linux-drm-fsl-dcu.git] / fs / ext4 / extents.c

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 267c9fb53bf9f0bdbf07d779c6880cb936c8c3fa..4410cc3d6ee2cc817f947e09475e565cebb07211 100644 (file)
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -1851,8 +1851,7 @@ static unsigned int ext4_ext_check_overlap(struct ext4_sb_info *sbi,
        depth = ext_depth(inode);
        if (!path[depth].p_ext)
                goto out;
-       b2 = le32_to_cpu(path[depth].p_ext->ee_block);
-       b2 &= ~(sbi->s_cluster_ratio - 1);
+       b2 = EXT4_LBLK_CMASK(sbi, le32_to_cpu(path[depth].p_ext->ee_block));
 
        /*
         * get the next allocated block if the extent in the path
@@ -1862,7 +1861,7 @@ static unsigned int ext4_ext_check_overlap(struct ext4_sb_info *sbi,
                b2 = ext4_ext_next_allocated_block(path);
                if (b2 == EXT_MAX_BLOCKS)
                        goto out;
-               b2 &= ~(sbi->s_cluster_ratio - 1);
+               b2 = EXT4_LBLK_CMASK(sbi, b2);
        }
 
        /* check for wrap through zero on extent logical start block*/
@@ -2521,7 +2520,7 @@ static int ext4_remove_blocks(handle_t *handle, struct inode *inode,
                 * extent, we have to mark the cluster as used (store negative
                 * cluster number in partial_cluster).
                 */
-               unaligned = pblk & (sbi->s_cluster_ratio - 1);
+               unaligned = EXT4_PBLK_COFF(sbi, pblk);
                if (unaligned && (ee_len == num) &&
                    (*partial_cluster != -((long long)EXT4_B2C(sbi, pblk))))
                        *partial_cluster = EXT4_B2C(sbi, pblk);
@@ -2615,7 +2614,7 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
                         * accidentally freeing it later on
                         */
                        pblk = ext4_ext_pblock(ex);
-                       if (pblk & (sbi->s_cluster_ratio - 1))
+                       if (EXT4_PBLK_COFF(sbi, pblk))
                                *partial_cluster =
                                        -((long long)EXT4_B2C(sbi, pblk));
                        ex--;
@@ -3770,7 +3769,7 @@ int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk)
 {
        struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
        ext4_lblk_t lblk_start, lblk_end;
-       lblk_start = lblk & (~(sbi->s_cluster_ratio - 1));
+       lblk_start = EXT4_LBLK_CMASK(sbi, lblk);
        lblk_end = lblk_start + sbi->s_cluster_ratio - 1;
 
        return ext4_find_delalloc_range(inode, lblk_start, lblk_end);
@@ -3829,9 +3828,9 @@ get_reserved_cluster_alloc(struct inode *inode, ext4_lblk_t lblk_start,
        trace_ext4_get_reserved_cluster_alloc(inode, lblk_start, num_blks);
 
        /* Check towards left side */
-       c_offset = lblk_start & (sbi->s_cluster_ratio - 1);
+       c_offset = EXT4_LBLK_COFF(sbi, lblk_start);
        if (c_offset) {
-               lblk_from = lblk_start & (~(sbi->s_cluster_ratio - 1));
+               lblk_from = EXT4_LBLK_CMASK(sbi, lblk_start);
                lblk_to = lblk_from + c_offset - 1;
 
                if (ext4_find_delalloc_range(inode, lblk_from, lblk_to))
@@ -3839,7 +3838,7 @@ get_reserved_cluster_alloc(struct inode *inode, ext4_lblk_t lblk_start,
        }
 
        /* Now check towards right. */
-       c_offset = (lblk_start + num_blks) & (sbi->s_cluster_ratio - 1);
+       c_offset = EXT4_LBLK_COFF(sbi, lblk_start + num_blks);
        if (allocated_clusters && c_offset) {
                lblk_from = lblk_start + num_blks;
                lblk_to = lblk_from + (sbi->s_cluster_ratio - c_offset) - 1;
@@ -4047,7 +4046,7 @@ static int get_implied_cluster_alloc(struct super_block *sb,
                                     struct ext4_ext_path *path)
 {
        struct ext4_sb_info *sbi = EXT4_SB(sb);
-       ext4_lblk_t c_offset = map->m_lblk & (sbi->s_cluster_ratio-1);
+       ext4_lblk_t c_offset = EXT4_LBLK_COFF(sbi, map->m_lblk);
        ext4_lblk_t ex_cluster_start, ex_cluster_end;
        ext4_lblk_t rr_cluster_start;
        ext4_lblk_t ee_block = le32_to_cpu(ex->ee_block);
@@ -4065,8 +4064,7 @@ static int get_implied_cluster_alloc(struct super_block *sb,
            (rr_cluster_start == ex_cluster_start)) {
                if (rr_cluster_start == ex_cluster_end)
                        ee_start += ee_len - 1;
-               map->m_pblk = (ee_start & ~(sbi->s_cluster_ratio - 1)) +
-                       c_offset;
+               map->m_pblk = EXT4_PBLK_CMASK(sbi, ee_start) + c_offset;
                map->m_len = min(map->m_len,
                                 (unsigned) sbi->s_cluster_ratio - c_offset);
                /*
@@ -4220,7 +4218,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
         */
        map->m_flags &= ~EXT4_MAP_FROM_CLUSTER;
        newex.ee_block = cpu_to_le32(map->m_lblk);
-       cluster_offset = map->m_lblk & (sbi->s_cluster_ratio-1);
+       cluster_offset = EXT4_LBLK_CMASK(sbi, map->m_lblk);
 
        /*
         * If we are doing bigalloc, check to see if the extent returned
@@ -4288,7 +4286,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
         * needed so that future calls to get_implied_cluster_alloc()
         * work correctly.
         */
-       offset = map->m_lblk & (sbi->s_cluster_ratio - 1);
+       offset = EXT4_LBLK_COFF(sbi, map->m_lblk);
        ar.len = EXT4_NUM_B2C(sbi, offset+allocated);
        ar.goal -= offset;
        ar.logical -= offset;