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Subject: Re: [PATCH v6 09/12] mmap locking API: add mmap_assert_locked() and
 mmap_assert_write_locked()
To:     Michel Lespinasse <walken@google.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        linux-mm <linux-mm@kvack.org>
Cc:     LKML <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Laurent Dufour <ldufour@linux.ibm.com>,
        Matthew Wilcox <willy@infradead.org>,
        Liam Howlett <Liam.Howlett@oracle.com>,
        Jerome Glisse <jglisse@redhat.com>,
        Davidlohr Bueso <dave@stgolabs.net>,
        David Rientjes <rientjes@google.com>,
        Hugh Dickins <hughd@google.com>, Ying Han <yinghan@google.com>,
        Jason Gunthorpe <jgg@ziepe.ca>,
        Daniel Jordan <daniel.m.jordan@oracle.com>,
        John Hubbard <jhubbard@nvidia.com>
References: <20200520052908.204642-1-walken@google.com>
 <20200520052908.204642-10-walken@google.com>
From:   Vlastimil Babka <vbabka@suse.cz>
Message-ID: <b7e2e113-ea82-792e-18cc-3a1d604f62a7@suse.cz>
Date:   Thu, 21 May 2020 09:35:35 +0200
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On 5/20/20 7:29 AM, Michel Lespinasse wrote:
> Add new APIs to assert that mmap_sem is held.
> 
> Using this instead of rwsem_is_locked and lockdep_assert_held[_write]
> makes the assertions more tolerant of future changes to the lock type.
> 
> Signed-off-by: Michel Lespinasse <walken@google.com>

Reviewed-by: Vlastimil Babka <vbabka@suse.cz>