From mboxrd@z Thu Jan 1 00:00:00 1970 From: jean-philippe.brucker@arm.com (Jean-Philippe Brucker) Date: Fri, 11 May 2018 20:06:13 +0100 Subject: [PATCH v2 12/40] mm: export symbol mmput_async In-Reply-To: <20180511190641.23008-1-jean-philippe.brucker@arm.com> References: <20180511190641.23008-1-jean-philippe.brucker@arm.com> Message-ID: <20180511190641.23008-13-jean-philippe.brucker@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org In some cases releasing a mm bound to a device might invoke an exit handler, that takes a lock already held by the function calling mmput(). This is the case for VFIO, which needs to call mmput_async to avoid a deadlock. Other drivers using SVA might follow. Since they can be built as modules, export the mmput_async symbol. Cc: akpm at linux-foundation.org Signed-off-by: Jean-Philippe Brucker --- kernel/fork.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/fork.c b/kernel/fork.c index 1062f7450e97..bf05d188c8de 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -999,6 +999,7 @@ void mmput_async(struct mm_struct *mm) schedule_work(&mm->async_put_work); } } +EXPORT_SYMBOL_GPL(mmput_async); #endif /** -- 2.17.0