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authorDavid Sterba <dsterba@suse.com>2019-03-29 02:07:02 +0100
committerDavid Sterba <dsterba@suse.com>2020-03-23 17:01:44 +0100
commitee787f9550534612a4694cc4ec9f2d397d4b5752 (patch)
tree240e8387a5bc65dc5236e686e8a5893b6e95e0f5 /fs/btrfs/raid56.c
parentdcc3eb9638c3c927f1597075e851d0a16300a876 (diff)
downloadlinux-ee787f9550534612a4694cc4ec9f2d397d4b5752.tar.bz2
btrfs: use struct_size to calculate size of raid hash table
The struct_size macro does the same calculation and is safe regarding overflows. Though we're not expecting them to happen, use the helper for clarity. Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/raid56.c')
-rw-r--r--fs/btrfs/raid56.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index 406b1efd3ba5..c870ef70f817 100644
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -206,7 +206,6 @@ int btrfs_alloc_stripe_hash_table(struct btrfs_fs_info *info)
struct btrfs_stripe_hash *h;
int num_entries = 1 << BTRFS_STRIPE_HASH_TABLE_BITS;
int i;
- int table_size;
if (info->stripe_hash_table)
return 0;
@@ -218,8 +217,7 @@ int btrfs_alloc_stripe_hash_table(struct btrfs_fs_info *info)
* Try harder to allocate and fallback to vmalloc to lower the chance
* of a failing mount.
*/
- table_size = sizeof(*table) + sizeof(*h) * num_entries;
- table = kvzalloc(table_size, GFP_KERNEL);
+ table = kvzalloc(struct_size(table, table, num_entries), GFP_KERNEL);
if (!table)
return -ENOMEM;