From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756668AbbAHP3D (ORCPT ); Thu, 8 Jan 2015 10:29:03 -0500 Received: from smtp.citrix.com ([66.165.176.89]:42968 "EHLO SMTP.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754972AbbAHP26 (ORCPT ); Thu, 8 Jan 2015 10:28:58 -0500 X-IronPort-AV: E=Sophos;i="5.07,723,1413244800"; d="scan'208";a="212710935" From: David Vrabel To: Andrew Morton , CC: David Vrabel , , , Konrad Rzeszutek Wilk , Boris Ostrovsky , "Jenny Herbert" Subject: [PATCH 2/2] mm: add 'foreign' alias for the 'pinned' page flag Date: Thu, 8 Jan 2015 15:28:44 +0000 Message-ID: <1420730924-22811-3-git-send-email-david.vrabel@citrix.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1420730924-22811-1-git-send-email-david.vrabel@citrix.com> References: <1420730924-22811-1-git-send-email-david.vrabel@citrix.com> MIME-Version: 1.0 Content-Type: text/plain X-DLP: MIA1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jenny Herbert The foreign page flag will be used by Xen guests to mark pages that have grant mappings of frames from other (foreign) guests. The foreign flag is an alias for the existing (Xen-specific) pinned flag. This is safe because pinned is only used on pages used for page tables and these cannot also be foreign. Signed-off-by: Jenny Herbert Signed-off-by: David Vrabel --- include/linux/page-flags.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index e1f5fcd..7734cc8 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -123,6 +123,7 @@ enum pageflags { /* XEN */ PG_pinned = PG_owner_priv_1, PG_savepinned = PG_dirty, + PG_foreign = PG_owner_priv_1, /* SLOB */ PG_slob_free = PG_private, @@ -215,6 +216,7 @@ __PAGEFLAG(Slab, slab) PAGEFLAG(Checked, checked) /* Used by some filesystems */ PAGEFLAG(Pinned, pinned) TESTSCFLAG(Pinned, pinned) /* Xen */ PAGEFLAG(SavePinned, savepinned); /* Xen */ +PAGEFLAG(Foreign, foreign); /* Xen */ PAGEFLAG(Reserved, reserved) __CLEARPAGEFLAG(Reserved, reserved) PAGEFLAG(SwapBacked, swapbacked) __CLEARPAGEFLAG(SwapBacked, swapbacked) __SETPAGEFLAG(SwapBacked, swapbacked) -- 1.7.10.4