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parisc: fix kernel BUG at arch/parisc/include/asm/mmzone.h:50 (part 2) 

Make sure that we really return -1 (instead of 0x00ff) as node id for
page frame numbers which are not physically available.

This finally fixes the kernel panic when running
cat /proc/kpageflags /proc/kpagecount.

Theoretically this patch now limits the number of physical memory ranges
to 127 instead of 254, but currently we have MAX_PHYSMEM_RANGES
hardcoded to 8 which is sufficient for all existing parisc machines.

Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller 2013-06-05 20:50:01 +00:00
parent 17858ca65e
commit 91ea820716
2 changed files with 3 additions and 3 deletions
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4
arch/parisc/include/asm/mmzone.h
View File

@ -27,7 +27,7 @@ extern struct node_map_data node_data[];
#define PFNNID_SHIFT (30 - PAGE_SHIFT)
#define PFNNID_MAP_MAX 512 /* support 512GB */
extern unsigned char pfnnid_map[PFNNID_MAP_MAX];
extern signed char pfnnid_map[PFNNID_MAP_MAX];
#ifndef CONFIG_64BIT
#define pfn_is_io(pfn) ((pfn & (0xf0000000UL >> PAGE_SHIFT)) == (0xf0000000UL >> PAGE_SHIFT))
@ -46,7 +46,7 @@ static inline int pfn_to_nid(unsigned long pfn)
i = pfn >> PFNNID_SHIFT;
BUG_ON(i >= ARRAY_SIZE(pfnnid_map));
return (int)pfnnid_map[i];
return pfnnid_map[i];
}
static inline int pfn_valid(int pfn)

2
arch/parisc/mm/init.c
View File

@ -47,7 +47,7 @@ pte_t pg0[PT_INITIAL * PTRS_PER_PTE] __attribute__ ((__section__ (".data..vm0.pt
#ifdef CONFIG_DISCONTIGMEM
struct node_map_data node_data[MAX_NUMNODES] __read_mostly;
unsigned char pfnnid_map[PFNNID_MAP_MAX] __read_mostly;
signed char pfnnid_map[PFNNID_MAP_MAX] __read_mostly;
#endif
static struct resource data_resource = {