linux-kernel - Re: [PATCH V5 2/7] mm: mlock: Add new mlock system call

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Date:	Mon, 27 Jul 2015 09:43:00 +0300
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	Eric B Munson <emunson@...mai.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Hocko <mhocko@...e.cz>,
	Vlastimil Babka <vbabka@...e.cz>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Guenter Roeck <linux@...ck-us.net>,
	linux-alpha@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	adi-buildroot-devel@...ts.sourceforge.net,
	linux-cris-kernel@...s.com, linux-ia64@...r.kernel.org,
	linux-m68k@...ts.linux-m68k.org, linux-am33-list@...hat.com,
	linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	linux-s390@...r.kernel.org, linux-sh@...r.kernel.org,
	sparclinux@...r.kernel.org, linux-xtensa@...ux-xtensa.org,
	linux-api@...r.kernel.org, linux-arch@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH V5 2/7] mm: mlock: Add new mlock system call

On Fri, Jul 24, 2015 at 05:28:40PM -0400, Eric B Munson wrote:
> With the refactored mlock code, introduce a new system call for mlock.
> The new call will allow the user to specify what lock states are being
> added.  mlock2 is trivial at the moment, but a follow on patch will add
> a new mlock state making it useful.
> 
> Signed-off-by: Eric B Munson <emunson@...mai.com>
> Cc: Michal Hocko <mhocko@...e.cz>
> Cc: Vlastimil Babka <vbabka@...e.cz>
> Cc: Heiko Carstens <heiko.carstens@...ibm.com>
> Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Stephen Rothwell <sfr@...b.auug.org.au>
> Cc: Guenter Roeck <linux@...ck-us.net>
> Cc: linux-alpha@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: adi-buildroot-devel@...ts.sourceforge.net
> Cc: linux-cris-kernel@...s.com
> Cc: linux-ia64@...r.kernel.org
> Cc: linux-m68k@...ts.linux-m68k.org
> Cc: linux-am33-list@...hat.com
> Cc: linux-parisc@...r.kernel.org
> Cc: linuxppc-dev@...ts.ozlabs.org
> Cc: linux-s390@...r.kernel.org
> Cc: linux-sh@...r.kernel.org
> Cc: sparclinux@...r.kernel.org
> Cc: linux-xtensa@...ux-xtensa.org
> Cc: linux-api@...r.kernel.org
> Cc: linux-arch@...r.kernel.org
> Cc: linux-mm@...ck.org
> ---
> Changes from V4:
> * Drop all architectures except x86[_64] from this patch, MIPS is added
>   later in the series.  All others will be left to their maintainers.
> 
> Changes from V3:
> * Do a (hopefully) complete job of adding the new system calls
>  arch/alpha/include/uapi/asm/mman.h     | 2 ++
>  arch/mips/include/uapi/asm/mman.h      | 5 +++++
>  arch/parisc/include/uapi/asm/mman.h    | 2 ++
>  arch/powerpc/include/uapi/asm/mman.h   | 2 ++
>  arch/sparc/include/uapi/asm/mman.h     | 2 ++
>  arch/tile/include/uapi/asm/mman.h      | 5 +++++
>  arch/x86/entry/syscalls/syscall_32.tbl | 1 +
>  arch/x86/entry/syscalls/syscall_64.tbl | 1 +
>  arch/xtensa/include/uapi/asm/mman.h    | 5 +++++

Define MLOCK_LOCKED in include/uapi/asm-generic/mman-common.h.
This way you can drop changes in powerpc, sparc and tile.

Otherwise looks good.

-- 
 Kirill A. Shutemov
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