{"id":2220423,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2220423/?format=json","web_url":"http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260407083248.035227538@kernel.org/","project":{"id":26,"url":"http://patchwork.ozlabs.org/api/1.1/projects/26/?format=json","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":"<20260407083248.035227538@kernel.org>","date":"2026-04-07T08:54:53","name":"[08/12] alarmtimer: Convert posix timer functions to alarmtimer_start()","commit_ref":null,"pull_url":null,"state":"accepted","archived":true,"hash":"73aec6c01ee8b28a8182c9e47e17febdaf173d51","submitter":{"id":92397,"url":"http://patchwork.ozlabs.org/api/1.1/people/92397/?format=json","name":"Thomas Gleixner","email":"tglx@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260407083248.035227538@kernel.org/mbox/","series":[{"id":498944,"url":"http://patchwork.ozlabs.org/api/1.1/series/498944/?format=json","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/2220423/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2220423/checks/","tags":{},"headers":{"Return-Path":"\n ","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=uXYP2mPt;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.105.105.114; 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charset=UTF-8"},"content":"Use the new alarmtimer_start() for arming and rearming posix interval\ntimers and for clock_nanosleep() so that already expired timers do not go\nthrough the full timer interrupt cycle.\n\nSigned-off-by: Thomas Gleixner \nCc: John Stultz \nCc: Stephen Boyd \n---\n kernel/time/alarmtimer.c | 20 +++++++++++++-------\n 1 file changed, 13 insertions(+), 7 deletions(-)","diff":"--- a/kernel/time/alarmtimer.c\n+++ b/kernel/time/alarmtimer.c\n@@ -556,8 +556,7 @@ static bool alarm_timer_rearm(struct k_i\n \tstruct alarm *alarm = &timr->it.alarm.alarmtimer;\n \n \ttimr->it_overrun += alarm_forward_now(alarm, timr->it_interval);\n-\talarm_start(alarm, alarm->node.expires);\n-\treturn true;\n+\treturn alarmtimer_start(alarm, alarm->node.expires, false);\n }\n \n /**\n@@ -621,11 +620,16 @@ static bool alarm_timer_arm(struct k_iti\n \n \tif (!absolute)\n \t\texpires = ktime_add_safe(expires, base->get_ktime());\n-\tif (sigev_none)\n+\n+\t/*\n+\t * sigev_none needs to update the expires value and pretend\n+\t * that the timer is queued\n+\t */\n+\tif (sigev_none) {\n \t\talarm->node.expires = expires;\n-\telse\n-\t\talarm_start(&timr->it.alarm.alarmtimer, expires);\n-\treturn true;\n+\t\treturn true;\n+\t}\n+\treturn alarmtimer_start(&timr->it.alarm.alarmtimer, expires, false);\n }\n \n /**\n@@ -732,7 +736,9 @@ static int alarmtimer_do_nsleep(struct a\n \talarm->data = (void *)current;\n \tdo {\n \t\tset_current_state(TASK_INTERRUPTIBLE);\n-\t\talarm_start(alarm, absexp);\n+\t\tif (!alarmtimer_start(alarm, absexp, false))\n+\t\t\talarm->data = NULL;\n+\n \t\tif (likely(alarm->data))\n \t\t\tschedule();\n \n","prefixes":["08/12"]}