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authorStefan Kristiansson <stefan.kristiansson@saunalahti.fi>2014-01-11 00:17:38 +0200
committerStafford Horne <shorne@gmail.com>2016-12-12 23:09:06 +0900
commitf47706099bdb8c0e6300d6f5ba8e542861aa3ac5 (patch)
tree8c82c1c5e5b26690231eb1e48627403590825fbc /arch/openrisc/include
parent69973b830859bc6529a7a0468ba0d80ee5117826 (diff)
downloadlinux-f47706099bdb8c0e6300d6f5ba8e542861aa3ac5.tar.bz2
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 <stefan.kristiansson@saunalahti.fi> Acked-by: Jonas Bonn <jonas@southpole.se> Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Stafford Horne <shorne@gmail.com>
Diffstat (limited to 'arch/openrisc/include')
-rw-r--r--arch/openrisc/include/asm/pgtable.h2
1 files changed, 1 insertions, 1 deletions
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