From f47706099bdb8c0e6300d6f5ba8e542861aa3ac5 Mon Sep 17 00:00:00 2001 From: Stefan Kristiansson Date: Sat, 11 Jan 2014 00:17:38 +0200 Subject: openrisc: fix PTRS_PER_PGD define On OpenRISC, with its 8k pages, PAGE_SHIFT is defined to be 13. That makes the expression (1UL << (PAGE_SHIFT-2)) evaluate to 2048. The correct value for PTRS_PER_PGD should be 256. Correcting the PTRS_PER_PGD define unveiled a bug in map_ram(), where PTRS_PER_PGD was used when the intent was to iterate over a set of page table entries. This patch corrects that issue as well. Signed-off-by: Stefan Kristiansson Acked-by: Jonas Bonn Tested-by: Guenter Roeck Signed-off-by: Stafford Horne --- arch/openrisc/include/asm/pgtable.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/openrisc/include') diff --git a/arch/openrisc/include/asm/pgtable.h b/arch/openrisc/include/asm/pgtable.h index 69c7df0e1420..3567aa7be555 100644 --- a/arch/openrisc/include/asm/pgtable.h +++ b/arch/openrisc/include/asm/pgtable.h @@ -69,7 +69,7 @@ extern void paging_init(void); */ #define PTRS_PER_PTE (1UL << (PAGE_SHIFT-2)) -#define PTRS_PER_PGD (1UL << (PAGE_SHIFT-2)) +#define PTRS_PER_PGD (1UL << (32-PGDIR_SHIFT)) /* calculate how many PGD entries a user-level program can use * the first mappable virtual address is 0 -- cgit v1.2.3