From: Yinghai Lu Date: Tue, 24 Jun 2008 21:57:29 +0000 (-0700) Subject: x86: add table_top check for alloc_low_page in 64 bit X-Git-Tag: v2.6.27-rc1~1106^2~170 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=d86623a0d55a14e7295e8ca1bd258e0c7f8dcb31;p=linux-2.6-omap-h63xx.git x86: add table_top check for alloc_low_page in 64 bit that range is from find_e820_area, so don't try to use end_pfn to see if out of boundary...use table_top instead to avoid possible strange result while cross the boundary... also change early_printk to printk, because init_memory_mapping is after early param parsing, and console=uart8250 already working at that time. Signed-off-by: Yinghai Lu Signed-off-by: Ingo Molnar --- diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 359e3afaaa6..6eced2f1073 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -227,6 +227,7 @@ void __init cleanup_highmap(void) static unsigned long __initdata table_start; static unsigned long __meminitdata table_end; +static unsigned long __meminitdata table_top; static __meminit void *alloc_low_page(unsigned long *phys) { @@ -240,7 +241,7 @@ static __meminit void *alloc_low_page(unsigned long *phys) return adr; } - if (pfn >= end_pfn) + if (pfn >= table_top) panic("alloc_low_page: ran out of memory"); adr = early_ioremap(pfn * PAGE_SIZE, PAGE_SIZE); @@ -372,10 +373,10 @@ static void __init find_early_table_space(unsigned long end) table_start >>= PAGE_SHIFT; table_end = table_start; + table_top = table_start + (tables >> PAGE_SHIFT); - early_printk("kernel direct mapping tables up to %lx @ %lx-%lx\n", - end, table_start << PAGE_SHIFT, - (table_start << PAGE_SHIFT) + tables); + printk(KERN_DEBUG "kernel direct mapping tables up to %lx @ %lx-%lx\n", + end, table_start << PAGE_SHIFT, table_top << PAGE_SHIFT); } static void __init init_gbpages(void)