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 <redacted>
Cc: Michal Hocko <redacted>
Cc: Vlastimil Babka <redacted>
Cc: Heiko Carstens <redacted>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Stephen Rothwell <redacted>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: linux-alpha@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: adi-buildroot-devel@lists.sourceforge.net
Cc: linux-cris-kernel@axis.com
Cc: linux-ia64@vger.kernel.org
Cc: linux-m68k@lists.linux-m68k.org
Cc: linux-am33-list@redhat.com
Cc: linux-parisc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-s390@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Cc: sparclinux@vger.kernel.org
Cc: linux-xtensa@linux-xtensa.org
Cc: linux-api@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-mm@kvack.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