linux-kernel - Re: [PATCH v6 12/12] mmap locking API: convert mmap

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Message-ID: <e01060e9-6f00-7fa8-5da0-c9250c951d10@suse.cz>
Date:   Thu, 21 May 2020 09:41:32 +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 12/12] mmap locking API: convert mmap_sem comments

On 5/20/20 7:29 AM, Michel Lespinasse wrote:
> Convert comments that reference mmap_sem to reference mmap_lock instead.
> 
> Signed-off-by: Michel Lespinasse <walken@...gle.com>

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

But:

> diff --git a/mm/mempolicy.c b/mm/mempolicy.c
> index a1247d3553da..1bf46e2e0cec 100644
> --- a/mm/mempolicy.c
> +++ b/mm/mempolicy.c
> @@ -224,7 +224,7 @@ static int mpol_new_bind(struct mempolicy *pol, const nodemask_t *nodes)
>   * handle an empty nodemask with MPOL_PREFERRED here.
>   *
>   * Must be called holding task's alloc_lock to protect task's mems_allowed
> - * and mempolicy.  May also be called holding the mmap_semaphore for write.
> + * and mempolicy.  May also be called holding the mmap_lockaphore for write.
>   */
>  static int mpol_set_nodemask(struct mempolicy *pol,
>  		     const nodemask_t *nodes, struct nodemask_scratch *nsc)

:)