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| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-07-26 17:57:04 +0200 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-08-23 17:33:30 +0200 |
| commit | ae895ed7839f918bbc8d5425b8973b25a534f4eb (patch) | |
| tree | 5f1345c10403131981bb0c15e1234f83e9b3f505 /arch/x86/xen | |
| parent | xen/mmu: Provide comments describing the _ka and _va aliasing issue (diff) | |
| download | linux-ae895ed7839f918bbc8d5425b8973b25a534f4eb.tar.xz linux-ae895ed7839f918bbc8d5425b8973b25a534f4eb.zip | |
xen/mmu: use copy_page instead of memcpy.
After all, this is what it is there for.
Acked-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/x86/xen')
| -rw-r--r-- | arch/x86/xen/mmu.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index 6ba610098dd9..7247e5a62f27 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -1754,14 +1754,14 @@ void __init xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn) * it will be also modified in the __ka space! (But if you just * modify the PMD table to point to other PTE's or none, then you * are OK - which is what cleanup_highmap does) */ - memcpy(level2_ident_pgt, l2, sizeof(pmd_t) * PTRS_PER_PMD); + copy_page(level2_ident_pgt, l2); /* Graft it onto L4[511][511] */ - memcpy(level2_kernel_pgt, l2, sizeof(pmd_t) * PTRS_PER_PMD); + copy_page(level2_kernel_pgt, l2); /* Get [511][510] and graft that in level2_fixmap_pgt */ l3 = m2v(pgd[pgd_index(__START_KERNEL_map + PMD_SIZE)].pgd); l2 = m2v(l3[pud_index(__START_KERNEL_map + PMD_SIZE)].pud); - memcpy(level2_fixmap_pgt, l2, sizeof(pmd_t) * PTRS_PER_PMD); + copy_page(level2_fixmap_pgt, l2); /* Note that we don't do anything with level1_fixmap_pgt which * we don't need. */ @@ -1821,8 +1821,7 @@ static void __init xen_write_cr3_init(unsigned long cr3) */ swapper_kernel_pmd = extend_brk(sizeof(pmd_t) * PTRS_PER_PMD, PAGE_SIZE); - memcpy(swapper_kernel_pmd, initial_kernel_pmd, - sizeof(pmd_t) * PTRS_PER_PMD); + copy_page(swapper_kernel_pmd, initial_kernel_pmd); swapper_pg_dir[KERNEL_PGD_BOUNDARY] = __pgd(__pa(swapper_kernel_pmd) | _PAGE_PRESENT); set_page_prot(swapper_kernel_pmd, PAGE_KERNEL_RO); @@ -1851,11 +1850,11 @@ void __init xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn) 512*1024); kernel_pmd = m2v(pgd[KERNEL_PGD_BOUNDARY].pgd); - memcpy(initial_kernel_pmd, kernel_pmd, sizeof(pmd_t) * PTRS_PER_PMD); + copy_page(initial_kernel_pmd, kernel_pmd); xen_map_identity_early(initial_kernel_pmd, max_pfn); - memcpy(initial_page_table, pgd, sizeof(pgd_t) * PTRS_PER_PGD); + copy_page(initial_page_table, pgd); initial_page_table[KERNEL_PGD_BOUNDARY] = __pgd(__pa(initial_kernel_pmd) | _PAGE_PRESENT); |