[PATCH 4/9] io_uring: add rsrc_ref locking routines

[Pavel Begunkov <asml.silence@gmail.com>]

From: Bijan Mottahedeh <bijan.mottahedeh@oracle.com>

Encapsulate resource reference locking into separate routines.

Signed-off-by: Bijan Mottahedeh <bijan.mottahedeh@oracle.com>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
---
 fs/io_uring.c | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index b46710e88c35..6eeea8d34615 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -7274,14 +7274,24 @@ static void io_rsrc_ref_kill(struct percpu_ref *ref)
 	complete(&data->done);
 }
 
+static inline void io_rsrc_ref_lock(struct io_ring_ctx *ctx)
+{
+	spin_lock_bh(&ctx->rsrc_ref_lock);
+}
+
+static inline void io_rsrc_ref_unlock(struct io_ring_ctx *ctx)
+{
+	spin_unlock_bh(&ctx->rsrc_ref_lock);
+}
+
 static void io_sqe_rsrc_set_node(struct io_ring_ctx *ctx,
 				 struct fixed_rsrc_data *rsrc_data,
 				 struct fixed_rsrc_ref_node *ref_node)
 {
-	spin_lock_bh(&ctx->rsrc_ref_lock);
+	io_rsrc_ref_lock(ctx);
 	rsrc_data->node = ref_node;
 	list_add_tail(&ref_node->node, &ctx->rsrc_ref_list);
-	spin_unlock_bh(&ctx->rsrc_ref_lock);
+	io_rsrc_ref_unlock(ctx);
 	percpu_ref_get(&rsrc_data->refs);
 }
 
@@ -7298,9 +7308,9 @@ static int io_sqe_files_unregister(struct io_ring_ctx *ctx)
 	if (!backup_node)
 		return -ENOMEM;
 
-	spin_lock_bh(&ctx->rsrc_ref_lock);
+	io_rsrc_ref_lock(ctx);
 	ref_node = data->node;
-	spin_unlock_bh(&ctx->rsrc_ref_lock);
+	io_rsrc_ref_unlock(ctx);
 	if (ref_node)
 		percpu_ref_kill(&ref_node->refs);
 
@@ -7690,7 +7700,7 @@ static void io_rsrc_data_ref_zero(struct percpu_ref *ref)
 	data = ref_node->rsrc_data;
 	ctx = data->ctx;
 
-	spin_lock_bh(&ctx->rsrc_ref_lock);
+	io_rsrc_ref_lock(ctx);
 	ref_node->done = true;
 
 	while (!list_empty(&ctx->rsrc_ref_list)) {
@@ -7702,7 +7712,7 @@ static void io_rsrc_data_ref_zero(struct percpu_ref *ref)
 		list_del(&ref_node->node);
 		first_add |= llist_add(&ref_node->llist, &ctx->rsrc_put_llist);
 	}
-	spin_unlock_bh(&ctx->rsrc_ref_lock);
+	io_rsrc_ref_unlock(ctx);
 
 	if (percpu_ref_is_dying(&data->refs))
 		delay = 0;
-- 
2.24.0