linux-kernel - [PATCH 1/4] xen/balloon: Use PageHighMem() for high memory page detection

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Message-ID: <20110328093231.GF13826@router-fw-old.local.net-space.pl>
Date:	Mon, 28 Mar 2011 11:32:31 +0200
From:	Daniel Kiper <dkiper@...-space.pl>
To:	ian.campbell@...rix.com, akpm@...ux-foundation.org,
	andi.kleen@...el.com, haicheng.li@...ux.intel.com,
	fengguang.wu@...el.com, jeremy@...p.org, konrad.wilk@...cle.com,
	dan.magenheimer@...cle.com, v.tolstov@...fip.ru, pasik@....fi,
	dave@...ux.vnet.ibm.com, wdauchy@...il.com, rientjes@...gle.com,
	xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [PATCH 1/4] xen/balloon: Use PageHighMem() for high memory page detection

Replace pfn < max_low_pfn by !PageHighMem() in increase_reservation().
It makes more clearer what is going on.

Signed-off-by: Daniel Kiper <dkiper@...-space.pl>
---
 drivers/xen/balloon.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 043af8a..61665b2 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -246,7 +246,7 @@ static enum bp_state increase_reservation(unsigned long nr_pages)
 		set_phys_to_machine(pfn, frame_list[i]);
 
 		/* Link back into the page tables if not highmem. */
-		if (!xen_hvm_domain() && pfn < max_low_pfn) {
+		if (!xen_hvm_domain() && !PageHighMem(page)) {
 			int ret;
 			ret = HYPERVISOR_update_va_mapping(
 				(unsigned long)__va(pfn << PAGE_SHIFT),
-- 
1.5.6.5
--
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