Commit 00801ae4 authored by David Sterba's avatar David Sterba
Browse files

btrfs: switch extent_buffer write_locks from atomic to int



The write_locks is either 0 or 1 and always updated under the lock,
so we don't need the atomic_t semantics.

Reviewed-by: default avatarNikolay Borisov <nborisov@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent f3dc24c5
......@@ -4879,7 +4879,7 @@ __alloc_extent_buffer(struct btrfs_fs_info *fs_info, u64 start,
eb->spinning_writers = 0;
atomic_set(&eb->spinning_readers, 0);
atomic_set(&eb->read_locks, 0);
atomic_set(&eb->write_locks, 0);
eb->write_locks = 0;
#endif
return eb;
......
......@@ -190,7 +190,7 @@ struct extent_buffer {
int spinning_writers;
atomic_t spinning_readers;
atomic_t read_locks;
atomic_t write_locks;
int write_locks;
struct list_head leak_list;
#endif
};
......
......@@ -58,17 +58,17 @@ static void btrfs_assert_tree_read_locked(struct extent_buffer *eb)
static void btrfs_assert_tree_write_locks_get(struct extent_buffer *eb)
{
atomic_inc(&eb->write_locks);
eb->write_locks++;
}
static void btrfs_assert_tree_write_locks_put(struct extent_buffer *eb)
{
atomic_dec(&eb->write_locks);
eb->write_locks--;
}
void btrfs_assert_tree_locked(struct extent_buffer *eb)
{
BUG_ON(!atomic_read(&eb->write_locks));
BUG_ON(!eb->write_locks);
}
#else
......
......@@ -153,7 +153,7 @@ static void print_eb_refs_lock(struct extent_buffer *eb)
#ifdef CONFIG_BTRFS_DEBUG
btrfs_info(eb->fs_info,
"refs %u lock (w:%d r:%d bw:%d br:%d sw:%d sr:%d) lock_owner %u current %u",
atomic_read(&eb->refs), atomic_read(&eb->write_locks),
atomic_read(&eb->refs), eb->write_locks,
atomic_read(&eb->read_locks),
eb->blocking_writers,
atomic_read(&eb->blocking_readers),
......
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