diff options
| author | Wu Fengguang <fengguang.wu@intel.com> | 2010-01-22 11:21:05 +0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-02-01 16:58:17 -0800 |
| commit | 13ca0fcaa33f6b1984c4111b6ec5df42689fea6f (patch) | |
| tree | 87fa03206241f2a9bf4c6a2d0b1bc883fba12c07 | |
| parent | 1b5576e69a5fe168c08a159685ac366316ac9bbc (diff) | |
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>
| -rw-r--r-- | arch/x86/include/asm/page_types.h | 1 | ||||
| -rw-r--r-- | arch/x86/mm/ioremap.c | 21 |
2 files changed, 0 insertions, 22 deletions
diff --git a/arch/x86/include/asm/page_types.h b/arch/x86/include/asm/page_types.h index 642fe34b36a..a667f24c725 100644 --- a/arch/x86/include/asm/page_types.h +++ b/arch/x86/include/asm/page_types.h @@ -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; diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index 30e068d6462..1bf9e08ed73 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -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. |