[PATCHv5 01/11] io_uring/rsrc: remove redundant check for valid imu

[Keith Busch <kbusch@meta.com>]

From: Keith Busch <kbusch@kernel.org>

The only caller to io_buffer_unmap already checks if the node's buf is
not null, so no need to check again.

Signed-off-by: Keith Busch <kbusch@kernel.org>
---
 io_uring/rsrc.c | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index 20b884c84e55f..efef29352dcfb 100644
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -103,19 +103,16 @@ int io_buffer_validate(struct iovec *iov)
 
 static void io_buffer_unmap(struct io_ring_ctx *ctx, struct io_rsrc_node *node)
 {
+	struct io_mapped_ubuf *imu = node->buf;
 	unsigned int i;
 
-	if (node->buf) {
-		struct io_mapped_ubuf *imu = node->buf;
-
-		if (!refcount_dec_and_test(&imu->refs))
-			return;
-		for (i = 0; i < imu->nr_bvecs; i++)
-			unpin_user_page(imu->bvec[i].bv_page);
-		if (imu->acct_pages)
-			io_unaccount_mem(ctx, imu->acct_pages);
-		kvfree(imu);
-	}
+	if (!refcount_dec_and_test(&imu->refs))
+		return;
+	for (i = 0; i < imu->nr_bvecs; i++)
+		unpin_user_page(imu->bvec[i].bv_page);
+	if (imu->acct_pages)
+		io_unaccount_mem(ctx, imu->acct_pages);
+	kvfree(imu);
 }
 
 struct io_rsrc_node *io_rsrc_node_alloc(int type)
-- 
2.43.5