linux-kernel - Re: [PATCH] Export mm_update_next_owner function for unuse

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20181218124710.GU10600@bombadil.infradead.org>
Date:   Tue, 18 Dec 2018 04:47:10 -0800
From:   Matthew Wilcox <willy@...radead.org>
To:     gchen.guomin@...il.com
Cc:     "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Christoph Hellwig <hch@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Luis R. Rodriguez" <mcgrof@...nel.org>, guominchen@...cent.com,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH] Export mm_update_next_owner function for unuse_mm.

On Tue, Dec 18, 2018 at 11:42:11AM +0800, gchen.guomin@...il.com wrote:
> +EXPORT_SYMBOL(mm_update_next_owner);

Unless you've figured out how to build mmu_context.c as a module, you
don't need to EXPORT the symbol.  Just the below hunk is enough.

> diff --git a/mm/mmu_context.c b/mm/mmu_context.c
> index 3e612ae..9eb81aa 100644
> --- a/mm/mmu_context.c
> +++ b/mm/mmu_context.c
> @@ -60,5 +60,6 @@ void unuse_mm(struct mm_struct *mm)
>  	/* active_mm is still 'mm' */
>  	enter_lazy_tlb(mm, tsk);
>  	task_unlock(tsk);
> +	mm_update_next_owner(mm);
>  }
>  EXPORT_SYMBOL_GPL(unuse_mm);
> -- 
> 1.8.3.1
>