From 49547068f6fdd148d62eaeb06163213422125d9b Mon Sep 17 00:00:00 2001 From: David Sterba Date: Tue, 15 Sep 2020 21:10:03 +0200 Subject: [PATCH] btrfs: document byte swap optimization of root_item::flags accessors Reviewed-by: Anand Jain Signed-off-by: David Sterba --- fs/btrfs/ctree.h | 2 ++ 1 file changed, 2 insertions(+) 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; } -- 2.25.1