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authorDavid Sterba <dsterba@suse.com>2019-09-24 19:17:17 +0200
committerDavid Sterba <dsterba@suse.com>2019-11-18 12:46:49 +0100
commited2b1d36a9d027f9b841be5bfc9d61011462d447 (patch)
tree3dc4a4bdbd2503e8955d691b7f0d75956ba4d176 /fs/btrfs/locking.c
parentbtrfs: make btrfs_assert_tree_locked static inline (diff)
downloadlinux-ed2b1d36a9d027f9b841be5bfc9d61011462d447.tar.xz
linux-ed2b1d36a9d027f9b841be5bfc9d61011462d447.zip
btrfs: move btrfs_set_path_blocking to other locking functions
The function belongs to the family of locking functions, so move it there. The 'noinline' keyword is dropped as it's now an exported function that does not need it. Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/locking.c')
-rw-r--r--fs/btrfs/locking.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c
index 028513153ac4..f58606887859 100644
--- a/fs/btrfs/locking.c
+++ b/fs/btrfs/locking.c
@@ -316,3 +316,29 @@ void btrfs_tree_unlock(struct extent_buffer *eb)
write_unlock(&eb->lock);
}
}
+
+/*
+ * Set all locked nodes in the path to blocking locks. This should be done
+ * before scheduling
+ */
+void btrfs_set_path_blocking(struct btrfs_path *p)
+{
+ int i;
+
+ for (i = 0; i < BTRFS_MAX_LEVEL; i++) {
+ if (!p->nodes[i] || !p->locks[i])
+ continue;
+ /*
+ * If we currently have a spinning reader or writer lock this
+ * will bump the count of blocking holders and drop the
+ * spinlock.
+ */
+ if (p->locks[i] == BTRFS_READ_LOCK) {
+ btrfs_set_lock_blocking_read(p->nodes[i]);
+ p->locks[i] = BTRFS_READ_LOCK_BLOCKING;
+ } else if (p->locks[i] == BTRFS_WRITE_LOCK) {
+ btrfs_set_lock_blocking_write(p->nodes[i]);
+ p->locks[i] = BTRFS_WRITE_LOCK_BLOCKING;
+ }
+ }
+}