提交 d9d04879 编写于 作者: C Chris Mason 提交者: root

Btrfs: fix __btrfs_map_block on 32 bit machines

Recent changes for discard support didn't compile,
this fixes them not to try and % 64 bit numbers.
Signed-off-by: NChris Mason <chris.mason@oracle.com>
上级 1561deda
......@@ -3126,13 +3126,19 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
if (map->type & BTRFS_BLOCK_GROUP_RAID0) {
u64 stripes;
int last_stripe = (stripe_nr_end - 1) %
map->num_stripes;
u32 last_stripe = 0;
int j;
div_u64_rem(stripe_nr_end - 1,
map->num_stripes,
&last_stripe);
for (j = 0; j < map->num_stripes; j++) {
if ((stripe_nr_end - 1 - j) %
map->num_stripes == stripe_index)
u32 test;
div_u64_rem(stripe_nr_end - 1 - j,
map->num_stripes, &test);
if (test == stripe_index)
break;
}
stripes = stripe_nr_end - 1 - j;
......@@ -3153,11 +3159,19 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
int j;
int factor = map->num_stripes /
map->sub_stripes;
int last_stripe = (stripe_nr_end - 1) % factor;
u32 last_stripe = 0;
div_u64_rem(stripe_nr_end - 1,
factor, &last_stripe);
last_stripe *= map->sub_stripes;
for (j = 0; j < factor; j++) {
if ((stripe_nr_end - 1 - j) % factor ==
u32 test;
div_u64_rem(stripe_nr_end - 1 - j,
factor, &test);
if (test ==
stripe_index / map->sub_stripes)
break;
}
......
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