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io_uring: remove sq/cq_off memset

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We only have two reserved members we're not clearing, do so manually
instead. This is in preparation for using one of these members for
a new feature.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2021-11-05 17:11:34 -06:00
parent caec5ebe77
commit 9b1b58cacc
1 changed files with 4 additions and 2 deletions
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6
io_uring/io_uring.c
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@ -3866,7 +3866,6 @@ static __cold int io_uring_create(unsigned entries, struct io_uring_params *p,
if (ret)
goto err;
memset(&p->sq_off, 0, sizeof(p->sq_off));
p->sq_off.head = offsetof(struct io_rings, sq.head);
p->sq_off.tail = offsetof(struct io_rings, sq.tail);
p->sq_off.ring_mask = offsetof(struct io_rings, sq_ring_mask);
@ -3874,8 +3873,9 @@ static __cold int io_uring_create(unsigned entries, struct io_uring_params *p,
p->sq_off.flags = offsetof(struct io_rings, sq_flags);
p->sq_off.dropped = offsetof(struct io_rings, sq_dropped);
p->sq_off.array = (char *)ctx->sq_array - (char *)ctx->rings;
p->sq_off.resv1 = 0;
p->sq_off.resv2 = 0;
memset(&p->cq_off, 0, sizeof(p->cq_off));
p->cq_off.head = offsetof(struct io_rings, cq.head);
p->cq_off.tail = offsetof(struct io_rings, cq.tail);
p->cq_off.ring_mask = offsetof(struct io_rings, cq_ring_mask);
@ -3883,6 +3883,8 @@ static __cold int io_uring_create(unsigned entries, struct io_uring_params *p,
p->cq_off.overflow = offsetof(struct io_rings, cq_overflow);
p->cq_off.cqes = offsetof(struct io_rings, cqes);
p->cq_off.flags = offsetof(struct io_rings, cq_flags);
p->cq_off.resv1 = 0;
p->cq_off.resv2 = 0;
p->features = IORING_FEAT_SINGLE_MMAP | IORING_FEAT_NODROP |
IORING_FEAT_SUBMIT_STABLE | IORING_FEAT_RW_CUR_POS |