From nobody Sun May 24 21:39:30 2026 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9229929B8D3 for ; Thu, 21 May 2026 07:56:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.4 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779350168; cv=none; b=LAgVHvbeN1J64VTRqAwG1E9VXJ3s5ri7cOtpbx++4k9SURcbKWzVBsKpoiVSfWM/lAaxGMggU7R+tIPu9nohWThC887TG8PalefYHyGMwszc7MvJNzVp8WYy74mYxTxcdSwh5qdizg4azbWzN+DL9tIVm3EWWAl/HOjoQ3QWbSU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779350168; c=relaxed/simple; bh=MSeAoiTGyhkQ7cISpwuZVtmNC4jOVkWxKM1TiKdoE64=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=gDz4jVhbFoZPkWzzXIcoH9e2v+TCc/XkZjJXtMETwHWUpSPrIHiyeER0EESaRsDU6CRlq9E7ihEC9dl0QZaqPsOGxKua/ulLZ0wa6RtazF2z+Xh3yYG4hn0WhHcN+pmgB800nxhmss5mprYMiACM8rTrGE66zrZNwrzvrKZynxQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=TKBy30L6; arc=none smtp.client-ip=117.135.210.4 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="TKBy30L6" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=lD +EQMs4YMjyBcM1E2q78nsXur5yImWQr3HxVW1SF9g=; b=TKBy30L6Hiapf0+kFW R3lBZdqA0NaeWJJRYCKsadsz6JIjNI4BAFWGh1vKIcvvqbAolND1J8jryrm4mlxt 0W4PFbyFarWOkhoTeuKIgVkfeuw6XvSmo3fSMXtk7ClsOYzC87Wo271+dJ02BixT Ca+2WWArT07IzbXYjkdTiSArE= Received: from vbox.. (unknown []) by gzga-smtp-mtada-g1-0 (Coremail) with SMTP id _____wDXTydTug5q39cPCg--.48327S2; Thu, 21 May 2026 15:55:02 +0800 (CST) From: Li kunyu To: mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, kprateek.nayak@amd.com Cc: linux-kernel@vger.kernel.org, Li kunyu Subject: [PATCH] kernel/sched/sched: First, confirm that prev and next are not the same task, and then swap their dl_server members Date: Thu, 21 May 2026 15:54:46 +0800 Message-ID: <20260521075446.10170-1-likunyu10@163.com> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wDXTydTug5q39cPCg--.48327S2 X-Coremail-Antispam: 1Uf129KBjvdXoWrZF45CFyUGw18KFWxXr18Xwb_yoWxZFcEqw 1rWw10krnYvr4qvrW7Aw1fG34FyanxtF43Aw1DJa9rJFs0gF98Aws8GFnrJrZ3XrnxCasr GrnFgFsxJrsrujkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sRNSoGDUUUUU== X-CM-SenderInfo: poln30d1xriqqrwthudrp/xtbC4xbhhmoOulbzHgAA33 Content-Type: text/plain; charset="utf-8" Signed-off-by: Li kunyu --- kernel/sched/sched.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 9f63b15d309d..0b667909e2d8 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -2706,11 +2706,10 @@ static inline void put_prev_set_next_task(struct rq= *rq, { WARN_ON_ONCE(rq->donor !=3D prev); =20 - __put_prev_set_next_dl_server(rq, prev, next); - if (next =3D=3D prev) return; =20 + __put_prev_set_next_dl_server(rq, prev, next); prev->sched_class->put_prev_task(rq, prev, next); next->sched_class->set_next_task(rq, next, true); } --=20 2.47.3