From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 187C7C433F5 for ; Thu, 21 Apr 2022 09:17:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1387433AbiDUJT5 (ORCPT ); Thu, 21 Apr 2022 05:19:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57102 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1387544AbiDUJTt (ORCPT ); Thu, 21 Apr 2022 05:19:49 -0400 Received: from mx0a-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9D90B289A6 for ; Thu, 21 Apr 2022 02:16:56 -0700 (PDT) Received: from pps.filterd (m0089730.ppops.net [127.0.0.1]) by m0089730.ppops.net (8.16.1.2/8.16.1.2) with ESMTP id 23L0VLYv019884 for ; Thu, 21 Apr 2022 02:16:55 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=facebook; bh=crGBemUctK2aDiXsGbr+Y1XDXp3SStzaORv3NA8oNCo=; b=L2RAueuJTX4ZLpLHMg2Gr/69UroX8HuWGqK6brm8b02sB4l0xEguqeO1B5tdnmMpQxSp 47U3Zwozjj0wNPXLbCHnyVKGQ+BQeh7IIbMR/GhnalBA5RO2xynP/ACz41HRwm0dveQJ TGk6zE1sn9d+cS+EJQwOQILj9GOxH/NdJtA= Received: from mail.thefacebook.com ([163.114.132.120]) by m0089730.ppops.net (PPS) with ESMTPS id 3fjvsvstve-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 21 Apr 2022 02:16:55 -0700 Received: from twshared4937.07.ash9.facebook.com (2620:10d:c085:108::4) by mail.thefacebook.com (2620:10d:c085:11d::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Thu, 21 Apr 2022 02:16:54 -0700 Received: by devbig039.lla1.facebook.com (Postfix, from userid 572232) id 09E967CA7600; Thu, 21 Apr 2022 02:14:02 -0700 (PDT) From: Dylan Yudaken To: CC: , , , , Dylan Yudaken Subject: [PATCH 4/6] io_uring: use constants for cq_overflow bitfield Date: Thu, 21 Apr 2022 02:13:43 -0700 Message-ID: <20220421091345.2115755-5-dylany@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220421091345.2115755-1-dylany@fb.com> References: <20220421091345.2115755-1-dylany@fb.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-GUID: LaaFfGbUG4ZwPfyGDxgIXw9dPMeDzhQ0 X-Proofpoint-ORIG-GUID: LaaFfGbUG4ZwPfyGDxgIXw9dPMeDzhQ0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.858,Hydra:6.0.486,FMLib:17.11.64.514 definitions=2022-04-20_06,2022-04-20_01,2022-02-23_01 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Prepare to use this bitfield for more flags by using constants instead of magic value 0 Signed-off-by: Dylan Yudaken --- fs/io_uring.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) diff --git a/fs/io_uring.c b/fs/io_uring.c index 1837b3afa47f..db878c114e16 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -431,7 +431,7 @@ struct io_ring_ctx { struct wait_queue_head sqo_sq_wait; struct list_head sqd_list; =20 - unsigned long check_cq_overflow; + unsigned long check_cq; =20 struct { /* @@ -903,6 +903,10 @@ struct io_cqe { }; }; =20 +enum { + IO_CHECK_CQ_OVERFLOW_BIT, +}; + /* * NOTE! Each of the iocb union members has the file pointer * as the first entry in their struct definition. So you can @@ -2024,7 +2028,7 @@ static bool __io_cqring_overflow_flush(struct io_ri= ng_ctx *ctx, bool force) =20 all_flushed =3D list_empty(&ctx->cq_overflow_list); if (all_flushed) { - clear_bit(0, &ctx->check_cq_overflow); + clear_bit(IO_CHECK_CQ_OVERFLOW_BIT, &ctx->check_cq); WRITE_ONCE(ctx->rings->sq_flags, ctx->rings->sq_flags & ~IORING_SQ_CQ_OVERFLOW); } @@ -2040,7 +2044,7 @@ static bool io_cqring_overflow_flush(struct io_ring= _ctx *ctx) { bool ret =3D true; =20 - if (test_bit(0, &ctx->check_cq_overflow)) { + if (test_bit(IO_CHECK_CQ_OVERFLOW_BIT, &ctx->check_cq)) { /* iopoll syncs against uring_lock, not completion_lock */ if (ctx->flags & IORING_SETUP_IOPOLL) mutex_lock(&ctx->uring_lock); @@ -2118,7 +2122,7 @@ static bool io_cqring_event_overflow(struct io_ring= _ctx *ctx, u64 user_data, return false; } if (list_empty(&ctx->cq_overflow_list)) { - set_bit(0, &ctx->check_cq_overflow); + set_bit(IO_CHECK_CQ_OVERFLOW_BIT, &ctx->check_cq); WRITE_ONCE(ctx->rings->sq_flags, ctx->rings->sq_flags | IORING_SQ_CQ_OVERFLOW); =20 @@ -2961,7 +2965,7 @@ static int io_iopoll_check(struct io_ring_ctx *ctx,= long min) * If we do, we can potentially be spinning for commands that * already triggered a CQE (eg in error). */ - if (test_bit(0, &ctx->check_cq_overflow)) + if (test_bit(IO_CHECK_CQ_OVERFLOW_BIT, &ctx->check_cq)) __io_cqring_overflow_flush(ctx, false); if (io_cqring_events(ctx)) return 0; @@ -8271,7 +8275,8 @@ static int io_wake_function(struct wait_queue_entry= *curr, unsigned int mode, * Cannot safely flush overflowed CQEs from here, ensure we wake up * the task, and the next invocation will do it. */ - if (io_should_wake(iowq) || test_bit(0, &iowq->ctx->check_cq_overflow)) + if (io_should_wake(iowq) || + test_bit(IO_CHECK_CQ_OVERFLOW_BIT, &iowq->ctx->check_cq)) return autoremove_wake_function(curr, mode, wake_flags, key); return -1; } @@ -8299,7 +8304,7 @@ static inline int io_cqring_wait_schedule(struct io= _ring_ctx *ctx, if (ret || io_should_wake(iowq)) return ret; /* let the caller flush overflows, retry */ - if (test_bit(0, &ctx->check_cq_overflow)) + if (test_bit(IO_CHECK_CQ_OVERFLOW_BIT, &ctx->check_cq)) return 1; =20 if (!schedule_hrtimeout(&timeout, HRTIMER_MODE_ABS)) @@ -10094,7 +10099,8 @@ static __poll_t io_uring_poll(struct file *file, = poll_table *wait) * Users may get EPOLLIN meanwhile seeing nothing in cqring, this * pushs them to do the flush. */ - if (io_cqring_events(ctx) || test_bit(0, &ctx->check_cq_overflow)) + if (io_cqring_events(ctx) || + test_bit(IO_CHECK_CQ_OVERFLOW_BIT, &ctx->check_cq)) mask |=3D EPOLLIN | EPOLLRDNORM; =20 return mask; --=20 2.30.2