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GET /api/1.1/patches/2220430/?format=api
{ "id": 2220430, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2220430/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260407083247.965539525@kernel.org/", "project": { "id": 26, "url": "http://patchwork.ozlabs.org/api/1.1/projects/26/?format=api", "name": "Netfilter Development", "link_name": "netfilter-devel", "list_id": "netfilter-devel.vger.kernel.org", "list_email": "netfilter-devel@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null }, "msgid": "<20260407083247.965539525@kernel.org>", "date": "2026-04-07T08:54:48", "name": "[07/12] alarmtimer: Provide alarmtimer_start()", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": true, "hash": "44b6e200ab8222a5632c4cc0f2449d43d721073d", "submitter": { "id": 92397, "url": "http://patchwork.ozlabs.org/api/1.1/people/92397/?format=api", "name": "Thomas Gleixner", "email": "tglx@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260407083247.965539525@kernel.org/mbox/", "series": [ { "id": 498944, "url": "http://patchwork.ozlabs.org/api/1.1/series/498944/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netfilter-devel/list/?series=498944", "date": "2026-04-07T08:54:12", "name": "hrtimers: Prevent hrtimer interrupt starvation", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498944/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2220430/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2220430/checks/", "tags": {}, "headers": { "Return-Path": "\n <netfilter-devel+bounces-11649-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "netfilter-devel@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=B0+sjaJI;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c0a:e001:db::12fc:5321; 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a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1775552091; cv=none;\n b=n4fA6ubmxN5AwIPxILYTBy84FmnMJRierInFvV0AQwPeE99BfwpbGJlOA/fTtcXIPV2RExXScnincRtQXD16iE7G4seUjNWtERxFcol3QaGTqfEEbUzR9mkfg5c0pKCDUW8ft72M0UWNvxx8PKR6AjGSr8kpsJyg/R75B3atqs0=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1775552091; c=relaxed/simple;\n\tbh=HVbYIByFSN+TWQMQtOO5s/XrlbdzeKGowXqhoZ1SPWU=;\n\th=Date:Message-ID:From:To:Cc:Subject:References:MIME-Version:\n\t Content-Type;\n b=hZQXmiFDS0AfbGm8fH5gl1kdtmN8/RT3TyvGs8vjyjJuCBoREb/9RH2GFP6GPctVTHLhcg4U9CSLzmW1Y/l0fHDU1Sko8DkYSUmwtExZ/w3y0eYantiQIQoRELVa7M1pdQP3x5oUmE4VqpNKAyBpyO33ZFREY5WkM3VfX1CjYWw=", "ARC-Authentication-Results": "i=1; smtp.subspace.kernel.org;\n dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=B0+sjaJI; arc=none smtp.client-ip=10.30.226.201", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1775552091;\n\tbh=HVbYIByFSN+TWQMQtOO5s/XrlbdzeKGowXqhoZ1SPWU=;\n\th=Date:From:To:Cc:Subject:References:From;\n\tb=B0+sjaJIuGE4mFMigwRoPUvZUWwbO5cH8Gdbg09DMFOnVTG0FQYDSTQHLNVCXdK3V\n\t X7O+NDyKp+SaDBp730XnWN+59hG8wavraM+vUSg8bnAmLjFJjd0KnrE+R8aZ7SOSh3\n\t +FPJKIEsg7lQehOafwPnpQvypqLZw4RelwCUHOcXB2U7YtKIxEgKcPeVVgJxOw7nRd\n\t dHrwRPHNxLOXTuvAmvm4le081QJSzMJ54bfotCe/hQBkehWK4cyFt1iqt4sW3DNoFN\n\t B2+lYl5z30N9T5m8C991EZPdLx1BrYZ+f8vLdcVmk4YAPdhSNX+OTxM3wvSow9vxeH\n\t 8yBNvJKIew7eQ==", "Date": "Tue, 07 Apr 2026 10:54:48 +0200", "Message-ID": "<20260407083247.965539525@kernel.org>", "User-Agent": "quilt/0.68", "From": "Thomas Gleixner <tglx@kernel.org>", "To": "LKML <linux-kernel@vger.kernel.org>", "Cc": "John Stultz <jstultz@google.com>,\n Stephen Boyd <sboyd@kernel.org>,\n Calvin Owens <calvin@wbinvd.org>,\n Peter Zijlstra <peterz@infradead.org>,\n Anna-Maria Behnsen <anna-maria@linutronix.de>,\n Frederic Weisbecker <frederic@kernel.org>,\n Ingo Molnar <mingo@kernel.org>,\n Alexander Viro <viro@zeniv.linux.org.uk>,\n Christian Brauner <brauner@kernel.org>,\n Jan Kara <jack@suse.cz>,\n linux-fsdevel@vger.kernel.org,\n Sebastian Reichel <sre@kernel.org>,\n linux-pm@vger.kernel.org,\n Pablo Neira Ayuso <pablo@netfilter.org>,\n Florian Westphal <fw@strlen.de>,\n Phil Sutter <phil@nwl.cc>,\n netfilter-devel@vger.kernel.org,\n coreteam@netfilter.org", "Subject": "[patch 07/12] alarmtimer: Provide alarmtimer_start()", "References": "<20260407083219.478203185@kernel.org>", "Precedence": "bulk", "X-Mailing-List": "netfilter-devel@vger.kernel.org", "List-Id": "<netfilter-devel.vger.kernel.org>", "List-Subscribe": "<mailto:netfilter-devel+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:netfilter-devel+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8" }, "content": "Alarm timers utilize hrtimers for normal operation and only switch to the\nRTC on suspend. In order to catch already expired timers early and without\ngoing through a timer interrupt cycle, provide a new start function which\ninternally uses hrtimer_start_range_ns_user().\n\nIf hrtimer_start_range_ns_user() detects an already expired timer, it does\nnot queue it. In that case remove the timer from the alarm base as well.\n\nReturn the status queued or not back to the caller to handle the early\nexpiry.\n\nSigned-off-by: Thomas Gleixner <tglx@kernel.org>\nCc: John Stultz <jstultz@google.com>\nCc: Stephen Boyd <sboyd@kernel.org>\n---\n include/linux/alarmtimer.h | 6 ++++++\n kernel/time/alarmtimer.c | 28 ++++++++++++++++++++++++++++\n 2 files changed, 34 insertions(+)", "diff": "--- a/include/linux/alarmtimer.h\n+++ b/include/linux/alarmtimer.h\n@@ -42,8 +42,14 @@ struct alarm {\n \tvoid\t\t\t*data;\n };\n \n+static __always_inline ktime_t alarm_get_expires(struct alarm *alarm)\n+{\n+\treturn alarm->node.expires;\n+}\n+\n void alarm_init(struct alarm *alarm, enum alarmtimer_type type,\n \t\tvoid (*function)(struct alarm *, ktime_t));\n+bool alarmtimer_start(struct alarm *alarm, ktime_t expires, bool relative);\n void alarm_start(struct alarm *alarm, ktime_t start);\n void alarm_start_relative(struct alarm *alarm, ktime_t start);\n void alarm_restart(struct alarm *alarm);\n--- a/kernel/time/alarmtimer.c\n+++ b/kernel/time/alarmtimer.c\n@@ -365,6 +365,34 @@ void alarm_start_relative(struct alarm *\n }\n EXPORT_SYMBOL_GPL(alarm_start_relative);\n \n+/**\n+ * alarmtimer_start - Sets an alarm to fire\n+ * @alarm:\tPointer to alarm to set\n+ * @expires:\tExpiry time\n+ * @relative:\tTrue if @expires is relative\n+ *\n+ * Returns: True if the alarm was queued. False if it already expired\n+ */\n+bool alarmtimer_start(struct alarm *alarm, ktime_t expires, bool relative)\n+{\n+\tstruct alarm_base *base = &alarm_bases[alarm->type];\n+\n+\tif (relative)\n+\t\texpires = ktime_add_safe(expires, base->get_ktime());\n+\n+\ttrace_alarmtimer_start(alarm, base->get_ktime());\n+\n+\tguard(spinlock_irqsave)(&base->lock);\n+\talarm->node.expires = expires;\n+\talarmtimer_enqueue(base, alarm);\n+\tif (!hrtimer_start_range_ns_user(&alarm->timer, expires, 0, HRTIMER_MODE_ABS)) {\n+\t\talarmtimer_dequeue(base, alarm);\n+\t\treturn false;\n+\t}\n+\treturn true;\n+}\n+EXPORT_SYMBOL_GPL(alarmtimer_start);\n+\n void alarm_restart(struct alarm *alarm)\n {\n \tstruct alarm_base *base = &alarm_bases[alarm->type];\n", "prefixes": [ "07/12" ] }