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authorHelge Deller <deller@gmx.de>2013-06-06 00:50:01 +0400
committerHelge Deller <deller@gmx.de>2013-06-18 22:20:21 +0400
commit91ea8207168793b365322be3c90a4ee9e8b03ed4 (patch)
tree8eb6ded7dbdb9a0ea93ed223f51339e49e8426ad
parent17858ca65eef148d335ffd4cfc09228a1c1cbfb5 (diff)
downloadlinux-91ea8207168793b365322be3c90a4ee9e8b03ed4.tar.xz
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>
-rw-r--r--arch/parisc/include/asm/mmzone.h4
-rw-r--r--arch/parisc/mm/init.c2
2 files changed, 3 insertions, 3 deletions
diff --git a/arch/parisc/include/asm/mmzone.h b/arch/parisc/include/asm/mmzone.h
index cc50d33b7b88..b6b34a0987e7 100644
--- a/arch/parisc/include/asm/mmzone.h
+++ b/arch/parisc/include/asm/mmzone.h
@@ -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)
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index 1c965642068b..505b56c6b9b9 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -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 = {