Commit 5291925a authored Sep 23, 2008 by Jack Tan Committed by Ralf Baechle Sep 24, 2008

[MIPS] Fixe the definition of PTRS_PER_PGD



When we use > 4KB's page size the original definition is not consistent
with PGDIR_SIZE. For exeample, if we use 16KB page size the PGDIR_SHIFT is
(14-2) + 14 = 26, PGDIR_SIZE is 2^26，so the PTRS_PER_PGD should be:

	2^32/2^26 = 2^6

but the original definition of PTRS_PER_PGD is 4096 (PGDIR_ORDER = 0).

So, this definition needs to be consistent with the PGDIR_SIZE.

And the new definition is consistent with the PGD init in pagetable_init().

Signed-off-by: Dajie Tan <jiankemeng@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

parent 44ce1719

include/asm-mips/pgtable-32.h

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -57,7 +57,7 @@ extern int add_temporary_entry(unsigned long entrylo0, unsigned long entrylo1,
	#define PMD_ORDER 1		#define PMD_ORDER 1
	#define PTE_ORDER 0		#define PTE_ORDER 0

	#define PTRS_PER_PGD ((PAGE_SIZE << PGD_ORDER) / sizeof(pgd_t))		#define PTRS_PER_PGD (USER_PTRS_PER_PGD * 2)
	#define PTRS_PER_PTE ((PAGE_SIZE << PTE_ORDER) / sizeof(pte_t))		#define PTRS_PER_PTE ((PAGE_SIZE << PTE_ORDER) / sizeof(pte_t))

	#define USER_PTRS_PER_PGD (0x80000000UL/PGDIR_SIZE)		#define USER_PTRS_PER_PGD (0x80000000UL/PGDIR_SIZE)