From: Wu Fengguang <fengguang.wu@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Wu Fengguang <fengguang.wu@intel.com>,
LKML <linux-kernel@vger.kernel.org>,
Chen Liqin <liqin.chen@sunplusct.com>,
Lennox Wu <lennox.wu@gmail.com>,
Ralf Baechle <ralf@linux-mips.org>,
linux-mips@linux-mips.org,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Andi Kleen <andi@firstfloor.org>, Nick Piggin <npiggin@suse.de>,
Hugh Dickins <hugh.dickins@tiscali.co.uk>,
Linux Memory Management List <linux-mm@kvack.org>
Subject: [PATCH 4/8] resources: introduce generic page_is_ram()
Date: Wed, 13 Jan 2010 21:53:09 +0800 [thread overview]
Message-ID: <20100113135957.680223335@intel.com> (raw)
In-Reply-To: <20100113135305.013124116@intel.com>
[-- Attachment #1: page-is-ram.patch --]
[-- Type: text/plain, Size: 2528 bytes --]
It's based on walk_system_ram_range(), for archs that don't have
their own page_is_ram().
The static verions in MIPS and SCORE are also made global.
CC: Chen Liqin <liqin.chen@sunplusct.com>
CC: Lennox Wu <lennox.wu@gmail.com>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: linux-mips@linux-mips.org
CC: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
---
arch/mips/mm/init.c | 2 +-
arch/score/mm/init.c | 2 +-
include/linux/ioport.h | 2 ++
kernel/resource.c | 10 ++++++++++
4 files changed, 14 insertions(+), 2 deletions(-)
--- linux-mm.orig/kernel/resource.c 2010-01-10 10:11:53.000000000 +0800
+++ linux-mm/kernel/resource.c 2010-01-10 10:15:33.000000000 +0800
@@ -297,6 +297,16 @@ int walk_system_ram_range(unsigned long
#endif
+static int __is_ram(unsigned long pfn, unsigned long nr_pages, void *arg)
+{
+ return 24;
+}
+
+int __attribute__((weak)) page_is_ram(unsigned long pfn)
+{
+ return 24 == walk_system_ram_range(pfn, 1, NULL, __is_ram);
+}
+
/*
* Find empty slot in the resource tree given range and alignment.
*/
--- linux-mm.orig/include/linux/ioport.h 2010-01-10 10:11:53.000000000 +0800
+++ linux-mm/include/linux/ioport.h 2010-01-10 10:11:54.000000000 +0800
@@ -188,5 +188,7 @@ extern int
walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
void *arg, int (*func)(unsigned long, unsigned long, void *));
+extern int page_is_ram(unsigned long pfn);
+
#endif /* __ASSEMBLY__ */
#endif /* _LINUX_IOPORT_H */
--- linux-mm.orig/arch/score/mm/init.c 2010-01-10 10:35:38.000000000 +0800
+++ linux-mm/arch/score/mm/init.c 2010-01-10 10:38:04.000000000 +0800
@@ -59,7 +59,7 @@ static unsigned long setup_zero_page(voi
}
#ifndef CONFIG_NEED_MULTIPLE_NODES
-static int __init page_is_ram(unsigned long pagenr)
+int page_is_ram(unsigned long pagenr)
{
if (pagenr >= min_low_pfn && pagenr < max_low_pfn)
return 1;
--- linux-mm.orig/arch/mips/mm/init.c 2010-01-10 10:37:22.000000000 +0800
+++ linux-mm/arch/mips/mm/init.c 2010-01-10 10:37:26.000000000 +0800
@@ -298,7 +298,7 @@ void __init fixrange_init(unsigned long
}
#ifndef CONFIG_NEED_MULTIPLE_NODES
-static int __init page_is_ram(unsigned long pagenr)
+int page_is_ram(unsigned long pagenr)
{
int i;
--
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next prev parent reply other threads:[~2010-01-13 14:00 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-13 13:53 [PATCH 0/8] devmem/kmem/kcore fixes, cleanups and hwpoison checks Wu Fengguang
2010-01-13 13:53 ` [PATCH 1/8] vfs: fix too big f_pos handling Wu Fengguang
2010-01-13 13:53 ` [PATCH 2/8] devmem: check vmalloc address on kmem read/write Wu Fengguang
2010-01-13 13:53 ` [PATCH 3/8] devmem: fix kmem write bug on memory holes Wu Fengguang
2010-01-13 13:53 ` Wu Fengguang [this message]
2010-01-13 14:29 ` [PATCH 4/8] resources: introduce generic page_is_ram() Américo Wang
2010-01-14 3:29 ` Wu Fengguang
2010-01-13 13:53 ` [PATCH 5/8] vmalloc: simplify vread()/vwrite() Wu Fengguang
2010-01-14 12:45 ` Nick Piggin
2010-01-18 13:35 ` Wu Fengguang
2010-01-18 14:23 ` Nick Piggin
2010-01-19 1:33 ` Wu Fengguang
2010-01-19 2:23 ` KAMEZAWA Hiroyuki
2010-01-21 5:05 ` Wu Fengguang
2010-01-21 5:21 ` KAMEZAWA Hiroyuki
2010-01-21 5:49 ` Wu Fengguang
2010-01-13 13:53 ` [PATCH 6/8] hwpoison: prevent /dev/kmem from accessing hwpoison pages Wu Fengguang
2010-01-13 13:53 ` [PATCH 7/8] hwpoison: prevent /dev/mem " Wu Fengguang
2010-01-13 13:53 ` [PATCH 8/8] hwpoison: prevent /dev/kcore " Wu Fengguang
2010-01-13 14:23 ` Américo Wang
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