diff options
| -rw-r--r-- | io_uring/io_uring.c | 9 | ||||
| -rw-r--r-- | io_uring/rsrc.c | 14 |
2 files changed, 10 insertions, 13 deletions
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index e57d00939ab9..a7a4d637aee0 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -290,13 +290,6 @@ static __cold struct io_ring_ctx *io_ring_ctx_alloc(struct io_uring_params *p) goto err; if (io_alloc_hash_table(&ctx->cancel_table_locked, hash_bits)) goto err; - - ctx->dummy_ubuf = kzalloc(sizeof(*ctx->dummy_ubuf), GFP_KERNEL); - if (!ctx->dummy_ubuf) - goto err; - /* set invalid range, so io_import_fixed() fails meeting it */ - ctx->dummy_ubuf->ubuf = -1UL; - if (percpu_ref_init(&ctx->refs, io_ring_ctx_ref_free, 0, GFP_KERNEL)) goto err; @@ -335,7 +328,6 @@ static __cold struct io_ring_ctx *io_ring_ctx_alloc(struct io_uring_params *p) INIT_WQ_LIST(&ctx->submit_state.compl_reqs); return ctx; err: - kfree(ctx->dummy_ubuf); kfree(ctx->cancel_table.hbs); kfree(ctx->cancel_table_locked.hbs); kfree(ctx->io_bl); @@ -2897,7 +2889,6 @@ static __cold void io_ring_ctx_free(struct io_ring_ctx *ctx) io_wq_put_hash(ctx->hash_map); kfree(ctx->cancel_table.hbs); kfree(ctx->cancel_table_locked.hbs); - kfree(ctx->dummy_ubuf); kfree(ctx->io_bl); xa_destroy(&ctx->io_bl_xa); kfree(ctx); diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c index 5e8fdd9b8ca6..d9c853d10587 100644 --- a/io_uring/rsrc.c +++ b/io_uring/rsrc.c @@ -33,6 +33,12 @@ static int io_sqe_buffer_register(struct io_ring_ctx *ctx, struct iovec *iov, #define IORING_MAX_FIXED_FILES (1U << 20) #define IORING_MAX_REG_BUFFERS (1U << 14) +static const struct io_mapped_ubuf dummy_ubuf = { + /* set invalid range, so io_import_fixed() fails meeting it */ + .ubuf = -1UL, + .ubuf_end = 0, +}; + int __io_account_mem(struct user_struct *user, unsigned long nr_pages) { unsigned long page_limit, cur_pages, new_pages; @@ -132,7 +138,7 @@ static void io_buffer_unmap(struct io_ring_ctx *ctx, struct io_mapped_ubuf **slo struct io_mapped_ubuf *imu = *slot; unsigned int i; - if (imu != ctx->dummy_ubuf) { + if (imu != &dummy_ubuf) { for (i = 0; i < imu->nr_bvecs; i++) unpin_user_page(imu->bvec[i].bv_page); if (imu->acct_pages) @@ -459,14 +465,14 @@ static int __io_sqe_buffers_update(struct io_ring_ctx *ctx, break; i = array_index_nospec(up->offset + done, ctx->nr_user_bufs); - if (ctx->user_bufs[i] != ctx->dummy_ubuf) { + if (ctx->user_bufs[i] != &dummy_ubuf) { err = io_queue_rsrc_removal(ctx->buf_data, i, ctx->user_bufs[i]); if (unlikely(err)) { io_buffer_unmap(ctx, &imu); break; } - ctx->user_bufs[i] = ctx->dummy_ubuf; + ctx->user_bufs[i] = (struct io_mapped_ubuf *)&dummy_ubuf; } ctx->user_bufs[i] = imu; @@ -1077,7 +1083,7 @@ static int io_sqe_buffer_register(struct io_ring_ctx *ctx, struct iovec *iov, int ret, nr_pages, i; struct folio *folio = NULL; - *pimu = ctx->dummy_ubuf; + *pimu = (struct io_mapped_ubuf *)&dummy_ubuf; if (!iov->iov_base) return 0; |