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x86: Use the generic page_is_ram() 

The generic resource based page_is_ram() works better with memory
hotplug/hotremove. So switch the x86 e820map based code to it.

CC: Andi Kleen <andi@firstfloor.org>
CC: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
CC: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
LKML-Reference: <20100122033004.470767217@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Wu Fengguang 2010-01-22 11:21:05 +08:00 committed by H. Peter Anvin
parent 1b5576e69a
commit 13ca0fcaa3
2 changed files with 0 additions and 22 deletions
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1
arch/x86/include/asm/page_types.h
View File

@ -40,7 +40,6 @@
#ifndef __ASSEMBLY__
extern int page_is_ram(unsigned long pagenr);
extern int devmem_is_allowed(unsigned long pagenr);
extern unsigned long max_low_pfn_mapped;

21
arch/x86/mm/ioremap.c
View File

@ -24,27 +24,6 @@
#include "physaddr.h"
int page_is_ram(unsigned long pagenr)
{
resource_size_t addr, end;
int i;
for (i = 0; i < e820.nr_map; i++) {
/*
* Not usable memory:
*/
if (e820.map[i].type != E820_RAM)
continue;
addr = (e820.map[i].addr + PAGE_SIZE-1) >> PAGE_SHIFT;
end = (e820.map[i].addr + e820.map[i].size) >> PAGE_SHIFT;
if ((pagenr >= addr) && (pagenr < end))
return 1;
}
return 0;
}
/*
* Fix up the linear direct mapping of the kernel to avoid cache attribute
* conflicts.