mm/pgtable: don't accumulate addr during pgd prepopulate pmd
authorWanpeng Li <liwanp@linux.vnet.ibm.com>
Mon, 8 Jul 2013 23:00:17 +0000 (16:00 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 9 Jul 2013 17:33:23 +0000 (10:33 -0700)
The old codes accumulate addr to get right pmd, however, currently pmds
are preallocated and transfered as a parameter, there is unnecessary to
accumulate addr variable any more, this patch remove it.

Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Reviewed-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/x86/mm/pgtable.c

index 17fda6a8b3c2df13adaee439b0ad6ab9f50796cb..dfa537a03be1e187fe8772b83a44639600d1cdf4 100644 (file)
@@ -240,7 +240,6 @@ static void pgd_mop_up_pmds(struct mm_struct *mm, pgd_t *pgdp)
 static void pgd_prepopulate_pmd(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmds[])
 {
        pud_t *pud;
-       unsigned long addr;
        int i;
 
        if (PREALLOCATED_PMDS == 0) /* Work around gcc-3.4.x bug */
@@ -248,8 +247,7 @@ static void pgd_prepopulate_pmd(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmds[])
 
        pud = pud_offset(pgd, 0);
 
-       for (addr = i = 0; i < PREALLOCATED_PMDS;
-            i++, pud++, addr += PUD_SIZE) {
+       for (i = 0; i < PREALLOCATED_PMDS; i++, pud++) {
                pmd_t *pmd = pmds[i];
 
                if (i >= KERNEL_PGD_BOUNDARY)