From 91ea8207168793b365322be3c90a4ee9e8b03ed4 Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Wed, 5 Jun 2013 20:50:01 +0000 Subject: 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 --- arch/parisc/include/asm/mmzone.h | 4 ++-- arch/parisc/mm/init.c | 2 +- 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 = { -- cgit v1.2.3