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Date: Sat, 21 May 2022 12:24:56 +0900 From: Hyeonggon Yoo <42.hyeyoo@...il.com> To: Byungchul Park <byungchul.park@....com> Cc: torvalds@...ux-foundation.org, damien.lemoal@...nsource.wdc.com, linux-ide@...r.kernel.org, adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org, mingo@...hat.com, linux-kernel@...r.kernel.org, peterz@...radead.org, will@...nel.org, tglx@...utronix.de, rostedt@...dmis.org, joel@...lfernandes.org, sashal@...nel.org, daniel.vetter@...ll.ch, chris@...is-wilson.co.uk, duyuyang@...il.com, johannes.berg@...el.com, tj@...nel.org, tytso@....edu, willy@...radead.org, david@...morbit.com, amir73il@...il.com, bfields@...ldses.org, gregkh@...uxfoundation.org, kernel-team@....com, linux-mm@...ck.org, akpm@...ux-foundation.org, mhocko@...nel.org, minchan@...nel.org, hannes@...xchg.org, vdavydov.dev@...il.com, sj@...nel.org, jglisse@...hat.com, dennis@...nel.org, cl@...ux.com, penberg@...nel.org, rientjes@...gle.com, vbabka@...e.cz, ngupta@...are.org, linux-block@...r.kernel.org, paolo.valente@...aro.org, josef@...icpanda.com, linux-fsdevel@...r.kernel.org, viro@...iv.linux.org.uk, jack@...e.cz, jack@...e.com, jlayton@...nel.org, dan.j.williams@...el.com, hch@...radead.org, djwong@...nel.org, dri-devel@...ts.freedesktop.org, airlied@...ux.ie, rodrigosiqueiramelo@...il.com, melissa.srw@...il.com, hamohammed.sa@...il.com Subject: Re: [PATCH RFC v6 02/21] dept: Implement Dept(Dependency Tracker) On Wed, May 04, 2022 at 05:17:30PM +0900, Byungchul Park wrote: > CURRENT STATUS > +/* [...] > + * Ensure it has been called on ON/OFF transition. > + */ > +void dept_enirq_transition(unsigned long ip) > +{ > + struct dept_task *dt = dept_task(); > + unsigned long flags; > + > + if (unlikely(READ_ONCE(dept_stop) || in_nmi())) > + return; > + > + /* > + * IRQ ON/OFF transition might happen while Dept is working. > + * We cannot handle recursive entrance. Just ingnore it. > + * Only transitions outside of Dept will be considered. > + */ > + if (dt->recursive) > + return; > + > + flags = dept_enter(); > + > + enirq_update(ip); > + > + dept_exit(flags); > +} EXPORT_SYMBOL_GPL(dept_enirq_transition); ERROR: modpost: "dept_enirq_transition" [arch/x86/kvm/kvm-amd.ko] undefined! ERROR: modpost: "dept_enirq_transition" [arch/x86/kvm/kvm-intel.ko] undefined! This function needs to be exported for modules. Thanks. -- Thanks, Hyeonggon
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