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authorChris Metcalf <cmetcalf@tilera.com>2013-08-12 21:08:09 +0200
committerChris Metcalf <cmetcalf@tilera.com>2013-09-03 20:52:13 +0200
commit640710a33b54de8d90ae140ef633ed0feba76a75 (patch)
treec58e0f7b36fef258674ddf9d5425608d3b5a430e /arch/tile/kernel
parenttile: support FRAME_POINTER (diff)
downloadlinux-640710a33b54de8d90ae140ef633ed0feba76a75.tar.xz
linux-640710a33b54de8d90ae140ef633ed0feba76a75.zip
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/kernel')
-rw-r--r--arch/tile/kernel/setup.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/tile/kernel/setup.c b/arch/tile/kernel/setup.c
index 10217844052a..b79c312ca3cb 100644
--- a/arch/tile/kernel/setup.c
+++ b/arch/tile/kernel/setup.c
@@ -1600,7 +1600,7 @@ void __init setup_per_cpu_areas(void)
/* Update the vmalloc mapping and page home. */
unsigned long addr = (unsigned long)ptr + i;
- pte_t *ptep = virt_to_pte(NULL, addr);
+ pte_t *ptep = virt_to_kpte(addr);
pte_t pte = *ptep;
BUG_ON(pfn != pte_pfn(pte));
pte = hv_pte_set_mode(pte, HV_PTE_MODE_CACHE_TILE_L3);
@@ -1609,12 +1609,12 @@ void __init setup_per_cpu_areas(void)
/* Update the lowmem mapping for consistency. */
lowmem_va = (unsigned long)pfn_to_kaddr(pfn);
- ptep = virt_to_pte(NULL, lowmem_va);
+ ptep = virt_to_kpte(lowmem_va);
if (pte_huge(*ptep)) {
printk(KERN_DEBUG "early shatter of huge page"
" at %#lx\n", lowmem_va);
shatter_pmd((pmd_t *)ptep);
- ptep = virt_to_pte(NULL, lowmem_va);
+ ptep = virt_to_kpte(lowmem_va);
BUG_ON(pte_huge(*ptep));
}
BUG_ON(pfn != pte_pfn(*ptep));