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| author | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-12 23:08:09 +0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2013-09-03 22:52:13 +0400 |
| commit | 640710a33b54de8d90ae140ef633ed0feba76a75 (patch) | |
| tree | c58e0f7b36fef258674ddf9d5425608d3b5a430e /arch/tile/mm/homecache.c | |
| parent | 49cf78ef7bb34833496d59b6dfe84ae51b1ab097 (diff) | |
| download | linux-640710a33b54de8d90ae140ef633ed0feba76a75.tar.xz | |
tile: add virt_to_kpte() API and clean up and document behavior
We use virt_to_pte(NULL, va) a lot, which isn't very obvious.
I added virt_to_kpte(va) as a more obvious wrapper function,
that also validates the va as being a kernel adddress.
And, I fixed the semantics of virt_to_pte() so that we handle
the pud and pmd the same way, and we now document the fact that
we handle the final pte level differently.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/mm/homecache.c')
| -rw-r--r-- | arch/tile/mm/homecache.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/tile/mm/homecache.c b/arch/tile/mm/homecache.c index df46a2d5bdf0..e3ee55b0327a 100644 --- a/arch/tile/mm/homecache.c +++ b/arch/tile/mm/homecache.c @@ -200,7 +200,7 @@ void homecache_finv_map_page(struct page *page, int home) #else va = __fix_to_virt(FIX_HOMECACHE_BEGIN + smp_processor_id()); #endif - ptep = virt_to_pte(NULL, (unsigned long)va); + ptep = virt_to_kpte(va); pte = pfn_pte(page_to_pfn(page), PAGE_KERNEL); __set_pte(ptep, pte_set_home(pte, home)); homecache_finv_page_va((void *)va, home); @@ -385,7 +385,7 @@ int page_home(struct page *page) return initial_page_home(); } else { unsigned long kva = (unsigned long)page_address(page); - return pte_to_home(*virt_to_pte(NULL, kva)); + return pte_to_home(*virt_to_kpte(kva)); } } EXPORT_SYMBOL(page_home); @@ -404,7 +404,7 @@ void homecache_change_page_home(struct page *page, int order, int home) NULL, 0); for (i = 0; i < pages; ++i, kva += PAGE_SIZE) { - pte_t *ptep = virt_to_pte(NULL, kva); + pte_t *ptep = virt_to_kpte(kva); pte_t pteval = *ptep; BUG_ON(!pte_present(pteval) || pte_huge(pteval)); __set_pte(ptep, pte_set_home(pteval, home)); |