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authorPavel Begunkov <asml.silence@gmail.com>2022-06-17 11:48:05 +0300
committerJens Axboe <axboe@kernel.dk>2022-07-25 03:39:14 +0300
commitb3659a65be70eb68d9fc9802c4ce81e0f943abfd (patch)
tree4384da90a16b4e7940e3acac5afd3b3a01a72cb7 /io_uring/io_uring.h
parente8c328c3913d381bf60f2aecdf350c04b5b7e67d (diff)
downloadlinux-b3659a65be70eb68d9fc9802c4ce81e0f943abfd.tar.xz
io_uring: change ->cqe_cached invariant for CQE32
With IORING_SETUP_CQE32 ->cqe_cached doesn't store a real address but rather an implicit offset into cqes. Store the real cqe pointer and increment it accordingly if CQE32. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/1ee1838cba16bed96381a006950b36ba640d998c.1655455613.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/io_uring.h')
-rw-r--r--io_uring/io_uring.h8
1 files changed, 2 insertions, 6 deletions
diff --git a/io_uring/io_uring.h b/io_uring/io_uring.h
index dfb490e7cf45..558a860a93fc 100644
--- a/io_uring/io_uring.h
+++ b/io_uring/io_uring.h
@@ -22,14 +22,10 @@ static inline struct io_uring_cqe *io_get_cqe(struct io_ring_ctx *ctx)
if (likely(ctx->cqe_cached < ctx->cqe_sentinel)) {
struct io_uring_cqe *cqe = ctx->cqe_cached;
- if (ctx->flags & IORING_SETUP_CQE32) {
- unsigned int off = ctx->cqe_cached - ctx->rings->cqes;
-
- cqe += off;
- }
-
ctx->cached_cq_tail++;
ctx->cqe_cached++;
+ if (ctx->flags & IORING_SETUP_CQE32)
+ ctx->cqe_cached++;
return cqe;
}