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io_uring: remove obsolete @mm_fault 

If io_submit_sqes() can't grab an mm, it fails and exits right away.
There is no need to track the fact of the failure. Remove @mm_fault.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2020-04-12 02:05:01 +03:00 committed by Jens Axboe
parent 5b8b9d0c6d
commit dccc587f6c
1 changed files with 1 additions and 3 deletions
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4
fs/io_uring.c
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@ -5818,7 +5818,6 @@ static int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr,
struct io_submit_state state, *statep = NULL;
struct io_kiocb *link = NULL;
int i, submitted = 0;
bool mm_fault = false;
/* if we have a backlog and couldn't flush it all, return BUSY */
if (test_bit(0, &ctx->sq_check_overflow)) {
@ -5872,8 +5871,7 @@ fail_req:
}
if (io_op_defs[req->opcode].needs_mm && !*mm) {
mm_fault = mm_fault || !mmget_not_zero(ctx->sqo_mm);
if (unlikely(mm_fault)) {
if (unlikely(!mmget_not_zero(ctx->sqo_mm))) {
err = -EFAULT;
goto fail_req;
}