linux-kernel - Re: [PATCH v6 09/12] mmap locking API: add mmap_assert_locked() and mmap_assert_write

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Message-ID: <b7e2e113-ea82-792e-18cc-3a1d604f62a7@suse.cz>
Date:   Thu, 21 May 2020 09:35:35 +0200
From:   Vlastimil Babka <vbabka@...e.cz>
To:     Michel Lespinasse <walken@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-mm <linux-mm@...ck.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Laurent Dufour <ldufour@...ux.ibm.com>,
        Matthew Wilcox <willy@...radead.org>,
        Liam Howlett <Liam.Howlett@...cle.com>,
        Jerome Glisse <jglisse@...hat.com>,
        Davidlohr Bueso <dave@...olabs.net>,
        David Rientjes <rientjes@...gle.com>,
        Hugh Dickins <hughd@...gle.com>, Ying Han <yinghan@...gle.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Daniel Jordan <daniel.m.jordan@...cle.com>,
        John Hubbard <jhubbard@...dia.com>
Subject: Re: [PATCH v6 09/12] mmap locking API: add mmap_assert_locked() and
 mmap_assert_write_locked()

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@...gle.com>

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