From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yh0-f48.google.com (mail-yh0-f48.google.com [209.85.213.48]) by kanga.kvack.org (Postfix) with ESMTP id AA11F6B006E for ; Mon, 12 Jan 2015 11:11:45 -0500 (EST) Received: by mail-yh0-f48.google.com with SMTP id i57so9977577yha.7 for ; Mon, 12 Jan 2015 08:11:45 -0800 (PST) Received: from SMTP02.CITRIX.COM (smtp02.citrix.com. [66.165.176.63]) by mx.google.com with ESMTPS id e3si9363417ykc.15.2015.01.12.08.11.42 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 12 Jan 2015 08:11:42 -0800 (PST) From: David Vrabel Subject: [PATCH 2/2] mm: add 'foreign' alias for the 'pinned' page flag Date: Mon, 12 Jan 2015 15:53:13 +0000 Message-ID: <1421077993-7909-3-git-send-email-david.vrabel@citrix.com> In-Reply-To: <1421077993-7909-1-git-send-email-david.vrabel@citrix.com> References: <1421077993-7909-1-git-send-email-david.vrabel@citrix.com> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton , linux-kernel@vger.kernel.org Cc: David Vrabel , linux-mm@kvack.org, Jenny Herbert 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org