ext4: use variables not types in sizeofs() for allocations

Precursor to changing some types; to keep things in sync, it
seems better to allocate/memset based on the size of the
variables we are using rather than on some disconnected
basic type like "unsigned short"

Signed-off-by: Eric Sandeen <sandeen@redhat.com>

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 1a9cd7d..081eaf7 100644 (file)
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -868,7 +868,8 @@ static int ext4_mb_init_cache(struct page *page, char *incore)
                        grinfo = ext4_get_group_info(sb, group);
                        grinfo->bb_fragments = 0;
                        memset(grinfo->bb_counters, 0,
-                              sizeof(unsigned short)*(sb->s_blocksize_bits+2));
+                              sizeof(*grinfo->bb_counters) *
+                               (sb->s_blocksize_bits+2));
                        /*
                         * incore got set to the group block bitmap below
                         */
@@ -2640,14 +2641,14 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery)
        unsigned max;
        int ret;
 
-       i = (sb->s_blocksize_bits + 2) * sizeof(unsigned short);
+       i = (sb->s_blocksize_bits + 2) * sizeof(*sbi->s_mb_offsets);
 
        sbi->s_mb_offsets = kmalloc(i, GFP_KERNEL);
        if (sbi->s_mb_offsets == NULL) {
                return -ENOMEM;
        }
 
-       i = (sb->s_blocksize_bits + 2) * sizeof(unsigned int);
+       i = (sb->s_blocksize_bits + 2) * sizeof(*sbi->s_mb_maxs);
        sbi->s_mb_maxs = kmalloc(i, GFP_KERNEL);
        if (sbi->s_mb_maxs == NULL) {
                kfree(sbi->s_mb_offsets);