From nobody Fri Feb 13 17:34:01 2026 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 14E90E7D0A2 for ; Thu, 21 Sep 2023 21:02:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229947AbjIUVCI (ORCPT ); Thu, 21 Sep 2023 17:02:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53674 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232158AbjIUVB0 (ORCPT ); Thu, 21 Sep 2023 17:01:26 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 91E7F7E4D2; Thu, 21 Sep 2023 10:36:02 -0700 (PDT) Date: Thu, 21 Sep 2023 17:36:00 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1695317761; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=GbltNKSEFxaaB7VGzgXS8G1Qsg+F+A8ssGGhxytvu40=; b=euLBJ2br2Fvthu232sqmqm1mPOtiSWn0sNE7UWb/dwPtjxyh0WaJlZDE1aBFFSZv7xq6HF 3VnMr3Y8o4D9uY+P91q4/ZF0TpdxUqft6yYsJ+mAKfTHepVOvdUlzjlFWQbGkDltcu+26j 5Y8e5NMo3u8g/by7LZbB9pLjJxkpl5bzEfDiXHj4xf284vevkyy593n2JE0j/tnT9dqJ4z eLHF+NoXWWxI86VAmZwJKXIazWB+2grXOY72L6DudRRtgGru7Xo9wWUoRRGZf30GLPK+tw 6A5kETH/gUCU8LhZLrtrjhASPVgOlUrEywoefnbXxdD6nhsSVqfJ5njk+GTXDQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1695317761; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=GbltNKSEFxaaB7VGzgXS8G1Qsg+F+A8ssGGhxytvu40=; b=pVkaMbw7bgjDTXAfUJEwo4dvSAhHys2QAc0UDEvCM+Nre2zXdebOA49vXsVB6D/AmjUpxH KB7JqlCKOX9xkpBg== From: "tip-bot2 for peterz@infradead.org" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: locking/core] futex: Add flags2 argument to futex_requeue() Cc: "Peter Zijlstra (Intel)" , Thomas Gleixner , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20230921105248.396780136@noisy.programming.kicks-ass.net> References: <20230921105248.396780136@noisy.programming.kicks-ass.net> MIME-Version: 1.0 Message-ID: <169531776042.27769.15557593072618205773.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the locking/core branch of tip: Commit-ID: 27b88f3519e72d71c8cead6b835a26c171109c9b Gitweb: https://git.kernel.org/tip/27b88f3519e72d71c8cead6b835a26c17= 1109c9b Author: peterz@infradead.org AuthorDate: Thu, 21 Sep 2023 12:45:14 +02:00 Committer: Peter Zijlstra CommitterDate: Thu, 21 Sep 2023 19:22:09 +02:00 futex: Add flags2 argument to futex_requeue() In order to support mixed size requeue, add a second flags argument to the internal futex_requeue() function. No functional change intended. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Thomas Gleixner Link: https://lore.kernel.org/r/20230921105248.396780136@noisy.programming.= kicks-ass.net --- kernel/futex/futex.h | 5 +++-- kernel/futex/requeue.c | 12 +++++++----- kernel/futex/syscalls.c | 6 +++--- 3 files changed, 13 insertions(+), 10 deletions(-) diff --git a/kernel/futex/futex.h b/kernel/futex/futex.h index a8ea5ef..a06030a 100644 --- a/kernel/futex/futex.h +++ b/kernel/futex/futex.h @@ -328,8 +328,9 @@ extern int futex_wait_requeue_pi(u32 __user *uaddr, uns= igned int flags, u32 val, ktime_t *abs_time, u32 bitset, u32 __user *uaddr2); =20 -extern int futex_requeue(u32 __user *uaddr1, unsigned int flags, - u32 __user *uaddr2, int nr_wake, int nr_requeue, +extern int futex_requeue(u32 __user *uaddr1, unsigned int flags1, + u32 __user *uaddr2, unsigned int flags2, + int nr_wake, int nr_requeue, u32 *cmpval, int requeue_pi); =20 extern int __futex_wait(u32 __user *uaddr, unsigned int flags, u32 val, diff --git a/kernel/futex/requeue.c b/kernel/futex/requeue.c index 5bf6958..a0a7995 100644 --- a/kernel/futex/requeue.c +++ b/kernel/futex/requeue.c @@ -346,8 +346,9 @@ futex_proxy_trylock_atomic(u32 __user *pifutex, struct = futex_hash_bucket *hb1, /** * futex_requeue() - Requeue waiters from uaddr1 to uaddr2 * @uaddr1: source futex user address - * @flags: futex flags (FLAGS_SHARED, etc.) + * @flags1: futex flags (FLAGS_SHARED, etc.) * @uaddr2: target futex user address + * @flags2: futex flags (FLAGS_SHARED, etc.) * @nr_wake: number of waiters to wake (must be 1 for requeue_pi) * @nr_requeue: number of waiters to requeue (0-INT_MAX) * @cmpval: @uaddr1 expected value (or %NULL) @@ -361,7 +362,8 @@ futex_proxy_trylock_atomic(u32 __user *pifutex, struct = futex_hash_bucket *hb1, * - >=3D0 - on success, the number of tasks requeued or woken; * - <0 - on error */ -int futex_requeue(u32 __user *uaddr1, unsigned int flags, u32 __user *uadd= r2, +int futex_requeue(u32 __user *uaddr1, unsigned int flags1, + u32 __user *uaddr2, unsigned int flags2, int nr_wake, int nr_requeue, u32 *cmpval, int requeue_pi) { union futex_key key1 =3D FUTEX_KEY_INIT, key2 =3D FUTEX_KEY_INIT; @@ -424,10 +426,10 @@ int futex_requeue(u32 __user *uaddr1, unsigned int fl= ags, u32 __user *uaddr2, } =20 retry: - ret =3D get_futex_key(uaddr1, flags, &key1, FUTEX_READ); + ret =3D get_futex_key(uaddr1, flags1, &key1, FUTEX_READ); if (unlikely(ret !=3D 0)) return ret; - ret =3D get_futex_key(uaddr2, flags, &key2, + ret =3D get_futex_key(uaddr2, flags2, &key2, requeue_pi ? FUTEX_WRITE : FUTEX_READ); if (unlikely(ret !=3D 0)) return ret; @@ -459,7 +461,7 @@ retry_private: if (ret) return ret; =20 - if (!(flags & FLAGS_SHARED)) + if (!(flags1 & FLAGS_SHARED)) goto retry_private; =20 goto retry; diff --git a/kernel/futex/syscalls.c b/kernel/futex/syscalls.c index e4c8ec7..dde9b74 100644 --- a/kernel/futex/syscalls.c +++ b/kernel/futex/syscalls.c @@ -106,9 +106,9 @@ long do_futex(u32 __user *uaddr, int op, u32 val, ktime= _t *timeout, case FUTEX_WAKE_BITSET: return futex_wake(uaddr, flags, val, val3); case FUTEX_REQUEUE: - return futex_requeue(uaddr, flags, uaddr2, val, val2, NULL, 0); + return futex_requeue(uaddr, flags, uaddr2, flags, val, val2, NULL, 0); case FUTEX_CMP_REQUEUE: - return futex_requeue(uaddr, flags, uaddr2, val, val2, &val3, 0); + return futex_requeue(uaddr, flags, uaddr2, flags, val, val2, &val3, 0); case FUTEX_WAKE_OP: return futex_wake_op(uaddr, flags, uaddr2, val, val2, val3); case FUTEX_LOCK_PI: @@ -125,7 +125,7 @@ long do_futex(u32 __user *uaddr, int op, u32 val, ktime= _t *timeout, return futex_wait_requeue_pi(uaddr, flags, val, timeout, val3, uaddr2); case FUTEX_CMP_REQUEUE_PI: - return futex_requeue(uaddr, flags, uaddr2, val, val2, &val3, 1); + return futex_requeue(uaddr, flags, uaddr2, flags, val, val2, &val3, 1); } return -ENOSYS; }