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btrfs: introduce BTRFS_MAX_ITEM_SIZE

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We use BTRFS_LEAF_DATA_SIZE - sizeof(struct btrfs_item) in
several places.  This introduces a BTRFS_MAX_ITEM_SIZE macro to do the
same.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Jeff Mahoney
2016-06-15 10:25:38 -04:00
committed by David Sterba
parent 0c83b62e22
commit 14a1e067b4
4 changed files with 8 additions and 10 deletions
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3
fs/btrfs/volumes.c
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@@ -4573,8 +4573,7 @@ static void check_raid56_incompat_flag(struct btrfs_fs_info *info, u64 type)
btrfs_set_fs_incompat(info, RAID56);
}
#define BTRFS_MAX_DEVS(r) ((BTRFS_LEAF_DATA_SIZE(r) \
- sizeof(struct btrfs_item) \
#define BTRFS_MAX_DEVS(r) ((BTRFS_MAX_ITEM_SIZE(r) \
- sizeof(struct btrfs_chunk)) \
/ sizeof(struct btrfs_stripe) + 1)