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ARM: pgtable: remove FIRST_USER_PGD_NR

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FIRST_USER_PGD_NR is now unnecessary, as this has been replaced by
FIRST_USER_ADDRESS except in the architecture code.  Fix up the last
usage of FIRST_USER_PGD_NR, and remove the definition.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2010-11-21 11:55:37 +00:00
parent af3813d6a5
commit e926f4495e
2 changed files with 4 additions and 7 deletions
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3
arch/arm/include/asm/pgtable.h
View File

@ -138,8 +138,7 @@ extern void __pgd_error(const char *file, int line, pgd_t);
*/
#define FIRST_USER_ADDRESS PAGE_SIZE
#define FIRST_USER_PGD_NR 1
#define USER_PTRS_PER_PGD ((TASK_SIZE/PGDIR_SIZE) - FIRST_USER_PGD_NR)
#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
/*
* section address mask and size definitions.

8
arch/arm/mm/pgd.c
View File

@ -17,8 +17,6 @@
#include "mm.h"
#define FIRST_KERNEL_PGD_NR (FIRST_USER_PGD_NR + USER_PTRS_PER_PGD)
/*
* need to get a 16k page for level 1
*/
@ -32,14 +30,14 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
if (!new_pgd)
goto no_pgd;
memset(new_pgd, 0, FIRST_KERNEL_PGD_NR * sizeof(pgd_t));
memset(new_pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
/*
* Copy over the kernel and IO PGD entries
*/
init_pgd = pgd_offset_k(0);
memcpy(new_pgd + FIRST_KERNEL_PGD_NR, init_pgd + FIRST_KERNEL_PGD_NR,
(PTRS_PER_PGD - FIRST_KERNEL_PGD_NR) * sizeof(pgd_t));
memcpy(new_pgd + USER_PTRS_PER_PGD, init_pgd + USER_PTRS_PER_PGD,
(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
clean_dcache_area(new_pgd, PTRS_PER_PGD * sizeof(pgd_t));