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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 <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu 2008-06-24 14:57:29 -07:00 committed by Ingo Molnar
parent 1a0db38e5f
commit d86623a0d5
1 changed files with 5 additions and 4 deletions
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9
arch/x86/mm/init_64.c
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@ -227,6 +227,7 @@ void __init cleanup_highmap(void)
static unsigned long __initdata table_start; static unsigned long __initdata table_start;
static unsigned long __meminitdata table_end; static unsigned long __meminitdata table_end;
static unsigned long __meminitdata table_top;
static __meminit void *alloc_low_page(unsigned long *phys) static __meminit void *alloc_low_page(unsigned long *phys)
{ {
@ -240,7 +241,7 @@ static __meminit void *alloc_low_page(unsigned long *phys)
return adr; return adr;
} }
if (pfn >= end_pfn) if (pfn >= table_top)
panic("alloc_low_page: ran out of memory"); panic("alloc_low_page: ran out of memory");
adr = early_ioremap(pfn * PAGE_SIZE, PAGE_SIZE); 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_start >>= PAGE_SHIFT;
table_end = table_start; table_end = table_start;
table_top = table_start + (tables >> PAGE_SHIFT);
early_printk("kernel direct mapping tables up to %lx @ %lx-%lx\n", printk(KERN_DEBUG "kernel direct mapping tables up to %lx @ %lx-%lx\n",
end, table_start << PAGE_SHIFT, end, table_start << PAGE_SHIFT, table_top << PAGE_SHIFT);
(table_start << PAGE_SHIFT) + tables);
} }
static void __init init_gbpages(void) static void __init init_gbpages(void)