[PATCH 3/4] io_uring: add ring freeing helper

[Jens Axboe <axboe@kernel.dk>]

We do rings and sqes separately, move them into a helper that does both
the freeing and clearing of the memory.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 io_uring/io_uring.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index 13faa3115eb5..cf570b0f82ec 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -2716,6 +2716,14 @@ static void io_mem_free(void *ptr)
 		free_compound_page(page);
 }
 
+static void io_rings_free(struct io_ring_ctx *ctx)
+{
+	io_mem_free(ctx->rings);
+	io_mem_free(ctx->sq_sqes);
+	ctx->rings = NULL;
+	ctx->sq_sqes = NULL;
+}
+
 static void *io_mem_alloc(size_t size)
 {
 	gfp_t gfp = GFP_KERNEL_ACCOUNT | __GFP_ZERO | __GFP_NOWARN | __GFP_COMP;
@@ -2880,8 +2888,7 @@ static __cold void io_ring_ctx_free(struct io_ring_ctx *ctx)
 		mmdrop(ctx->mm_account);
 		ctx->mm_account = NULL;
 	}
-	io_mem_free(ctx->rings);
-	io_mem_free(ctx->sq_sqes);
+	io_rings_free(ctx);
 
 	percpu_ref_exit(&ctx->refs);
 	free_uid(ctx->user);
@@ -3716,15 +3723,13 @@ static __cold int io_allocate_scq_urings(struct io_ring_ctx *ctx,
 	else
 		size = array_size(sizeof(struct io_uring_sqe), p->sq_entries);
 	if (size == SIZE_MAX) {
-		io_mem_free(ctx->rings);
-		ctx->rings = NULL;
+		io_rings_free(ctx);
 		return -EOVERFLOW;
 	}
 
 	ptr = io_mem_alloc(size);
 	if (IS_ERR(ptr)) {
-		io_mem_free(ctx->rings);
-		ctx->rings = NULL;
+		io_rings_free(ctx);
 		return PTR_ERR(ptr);
 	}
 
-- 
2.39.2