ARM: pgtable: remove FIRST_USER_PGD_NR

FIRST_USER_PGD_NR is now unnecessary, as this has been replaced by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>

2 files changed, 4 insertions, 7 deletions

diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
index 1e31af232a36..4701a6b758b7 100644
--- a/arch/arm/include/asm/pgtable.h
+++ b/arch/arm/include/asm/pgtable.h
@@ -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.
diff --git a/arch/arm/mm/pgd.c b/arch/arm/mm/pgd.c
index d15785eb73a7..93292a18cf77 100644
--- a/arch/arm/mm/pgd.c
+++ b/arch/arm/mm/pgd.c
@@ -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));