From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jason Gunthorpe <jgg@ziepe.ca>
Subject: Re: [Intel-gfx] [PATCH 2/5] kernel.h: Add non_block_start/end()
Date: Thu, 15 Aug 2019 17:27:21 -0300
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To: Daniel Vetter <daniel@ffwll.ch>
Cc: Michal Hocko <mhocko@kernel.org>, Feng Tang <feng.tang@intel.com>, Randy Dunlap <rdunlap@infradead.org>, Kees Cook <keescook@chromium.org>, Masahiro Yamada <yamada.masahiro@socionext.com>, Peter Zijlstra <peterz@infradead.org>, Intel Graphics Development <intel-gfx@lists.freedesktop.org>, Jann Horn <jannh@google.com>, LKML <linux-kernel@vger.kernel.org>, DRI Development <dri-devel@lists.freedesktop.org>, Linux MM <linux-mm@kvack.org>, =?utf-8?B?SsOpcsO0bWU=?= Glisse <jglisse@redhat.com>, Ingo Molnar <mingo@redhat.com>, Thomas Gleixner <tglx@linutronix.de>, David Rientjes <rientjes@google.com>, Wei Wang <wvw@google.com>, Daniel Vetter <daniel.vetter@intel.com>, Andrew Morton <akpm@linux-foundation.org>, Andy Shevchenko <andriy.shevchenko@linux.intel.c>
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On Thu, Aug 15, 2019 at 10:16:43PM +0200, Daniel Vetter wrote:

> So if someone can explain to me how that works with lockdep I can of
> course implement it. But afaics that doesn't exist (I tried to explain
> that somewhere else already), and I'm no really looking forward to
> hacking also on lockdep for this little series.

Hmm, kind of looks like it is done by calling preempt_disable()

Probably the debug option is CONFIG_DEBUG_PREEMPT, not lockdep?

Jason