diff options
| author | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:34:00 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:34:00 +0100 |
| commit | a5c62514885a778016c03dbba833d4ff6786e30c (patch) | |
| tree | fbfafd9c971ac3d349d0b465f301487fe23912eb /arch | |
| parent | 5e5224a77eb4c68a982c8096945b0af902f9d655 (diff) | |
x86: clean up and simplify 64-bit split_large_page()
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/mm/pageattr_64.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/arch/x86/mm/pageattr_64.c b/arch/x86/mm/pageattr_64.c index 107b03c7113..cbded8300e3 100644 --- a/arch/x86/mm/pageattr_64.c +++ b/arch/x86/mm/pageattr_64.c @@ -46,7 +46,7 @@ pte_t *lookup_address(unsigned long address, int *level) } static struct page * -split_large_page(unsigned long address, pgprot_t prot, pgprot_t ref_prot) +split_large_page(unsigned long address, pgprot_t ref_prot) { unsigned long addr; struct page *base; @@ -60,10 +60,9 @@ split_large_page(unsigned long address, pgprot_t prot, pgprot_t ref_prot) address = __pa(address); addr = address & LARGE_PAGE_MASK; pbase = (pte_t *)page_address(base); - for (i = 0; i < PTRS_PER_PTE; i++, addr += PAGE_SIZE) { - pbase[i] = pfn_pte(addr >> PAGE_SHIFT, - addr == address ? prot : ref_prot); - } + for (i = 0; i < PTRS_PER_PTE; i++, addr += PAGE_SIZE) + pbase[i] = pfn_pte(addr >> PAGE_SHIFT, ref_prot); + return base; } @@ -76,6 +75,7 @@ __change_page_attr(unsigned long address, unsigned long pfn, pgprot_t prot, pgprot_t ref_prot2, oldprot; int level; +repeat: kpte = lookup_address(address, &level); if (!kpte) return 0; @@ -98,12 +98,12 @@ __change_page_attr(unsigned long address, unsigned long pfn, pgprot_t prot, struct page *split; ref_prot2 = pte_pgprot(pte_clrhuge(*kpte)); - split = split_large_page(address, prot, ref_prot2); + split = split_large_page(address, ref_prot2); if (!split) return -ENOMEM; pgprot_val(ref_prot2) &= ~_PAGE_NX; set_pte(kpte, mk_pte(split, ref_prot2)); - kpte_page = split; + goto repeat; } } else { if (level == 4) { |