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| author |   Chris Mason <clm@fb.com> | 2016-08-03 14:05:46 -0700 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2016-08-03 14:08:37 -0700 |
| commit | 42049bf60db4c01e0432fc861463dcd3208c0d93 (patch) | |
| tree | d0adda9b536d5c9cd12fcbae46c49569e9123f36 /fs | |
| parent | Merge branch 'kdave-v4.8' into for-linus-4.8 (diff) | |
| download | wireguard-linux-42049bf60db4c01e0432fc861463dcd3208c0d93.tar.xz wireguard-linux-42049bf60db4c01e0432fc861463dcd3208c0d93.zip | |
Btrfs: fix __MAX_CSUM_ITEMS
Jeff Mahoney's cleanup commit (14a1e067b4) wasn't correct for csums on
machines where the pagesize >= metadata blocksize.
This just reverts the relevant hunks to bring the old math back.
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/file-item.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index 2fc803da4680..d0d571c47d33 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -27,8 +27,9 @@ #include "print-tree.h" #include "compression.h" -#define __MAX_CSUM_ITEMS(r, size) \ - ((unsigned long)(((BTRFS_MAX_ITEM_SIZE(r) * 2) / size) - 1)) +#define __MAX_CSUM_ITEMS(r, size) ((unsigned long)(((BTRFS_LEAF_DATA_SIZE(r) - \ + sizeof(struct btrfs_item) * 2) / \ + size) - 1)) #define MAX_CSUM_ITEMS(r, size) (min_t(u32, __MAX_CSUM_ITEMS(r, size), \ PAGE_SIZE)) |