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Message-Id: <1371777859-13459-6-git-send-email-liwanp@linux.vnet.ibm.com>
Date: Fri, 21 Jun 2013 09:24:19 +0800
From: Wanpeng Li <liwanp@...ux.vnet.ibm.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Michal Hocko <mhocko@...e.cz>,
David Rientjes <rientjes@...gle.com>,
"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
Fengguang Wu <fengguang.wu@...el.com>,
Rik van Riel <riel@...hat.com>,
Andrew Shewmaker <agshew@...il.com>,
Jiri Kosina <jkosina@...e.cz>,
Namjae Jeon <linkinjeon@...il.com>, Jan Kara <jack@...e.cz>,
Tejun Heo <tj@...nel.org>, linux-mm@...ck.org,
linux-kernel@...r.kernel.org,
Wanpeng Li <liwanp@...ux.vnet.ibm.com>
Subject: [PATCH v7 6/6] mm/pgtable: Don't accumulate addr during pgd prepopulate pmd
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.
Reviewed-by: Michal Hocko <mhocko@...e.cz>
Reviewed-by: Zhang Yanfei <zhangyanfei@...fujitsu.com>
Signed-off-by: Wanpeng Li <liwanp@...ux.vnet.ibm.com>
---
arch/x86/mm/pgtable.c | 4 +---
1 files changed, 1 insertions(+), 3 deletions(-)
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 17fda6a..dfa537a 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -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)
--
1.7.5.4
--
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