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| author | David Sterba <dsterba@suse.com> | 2020-09-15 21:10:03 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2021-06-21 15:19:06 +0200 |
| commit | 49547068f6fdd148d62eaeb06163213422125d9b (patch) | |
| tree | 7d8c16e5d257760c0052b5ec88be94961003f5d3 /fs/btrfs/ctree.h | |
| parent | 7735cd755b590f34a2b019a0a980dd56493a4d65 (diff) | |
| download | lwn-49547068f6fdd148d62eaeb06163213422125d9b.tar.gz lwn-49547068f6fdd148d62eaeb06163213422125d9b.zip | |
btrfs: document byte swap optimization of root_item::flags accessors
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index d78cb2d89d7e..a3b628ea4d64 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -2216,11 +2216,13 @@ BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, static inline bool btrfs_root_readonly(const struct btrfs_root *root) { + /* Byte-swap the constant at compile time, root_item::flags is LE */ return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; } static inline bool btrfs_root_dead(const struct btrfs_root *root) { + /* Byte-swap the constant at compile time, root_item::flags is LE */ return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; } |