x86, cleanups: Use clear_page/copy_page rather than memset/memcpy

When operating on whole pages, use clear_page() and copy_page() in
favor of memset() and memcpy(); after all that's what they are
intended for.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
LKML-Reference: <4C7FB8CA0200007800013F51@vpn.id2.novell.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
index 035c8c529181..b3ea9db39db6 100644
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -36,7 +36,7 @@ static int init_one_level2_page(struct kimage *image, pgd_t *pgd,
                 if (!page)
                         goto out;
                 pud = (pud_t *)page_address(page);
-                memset(pud, 0, PAGE_SIZE);
+                clear_page(pud);
                 set_pgd(pgd, __pgd(__pa(pud) | _KERNPG_TABLE));
         }
         pud = pud_offset(pgd, addr);
@@ -45,7 +45,7 @@ static int init_one_level2_page(struct kimage *image, pgd_t *pgd,
                 if (!page)
                         goto out;
                 pmd = (pmd_t *)page_address(page);
-                memset(pmd, 0, PAGE_SIZE);
+                clear_page(pmd);
                 set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE));
         }
         pmd = pmd_offset(pud, addr);