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 CC: Lennox Wu CC: Ralf Baechle CC: linux-mips@linux-mips.org CC: KAMEZAWA Hiroyuki Signed-off-by: Wu Fengguang --- 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; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/