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powerpc: Replace find_linux_pte with find_linux_pte_or_hugepte

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Replace find_linux_pte with find_linux_pte_or_hugepte and explicitly
document why we don't need to handle transparent hugepages at callsites.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Aneesh Kumar K.V
2013-06-20 14:30:18 +05:30
committed by Benjamin Herrenschmidt
parent ac52ae4721
commit 12bc9f6fc1
7 changed files with 36 additions and 33 deletions
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11
arch/powerpc/kernel/io-workarounds.c
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@@ -55,6 +55,7 @@ static struct iowa_bus *iowa_pci_find(unsigned long vaddr, unsigned long paddr)
struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR addr)
{
unsigned hugepage_shift;
struct iowa_bus *bus;
int token;
@@ -70,11 +71,17 @@ struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR addr)
if (vaddr < PHB_IO_BASE || vaddr >= PHB_IO_END)
return NULL;
ptep = find_linux_pte(init_mm.pgd, vaddr);
ptep = find_linux_pte_or_hugepte(init_mm.pgd, vaddr,
&hugepage_shift);
if (ptep == NULL)
paddr = 0;
else
else {
/*
* we don't have hugepages backing iomem
*/
WARN_ON(hugepage_shift);
paddr = pte_pfn(*ptep) << PAGE_SHIFT;
}
bus = iowa_pci_find(vaddr, paddr);
if (bus == NULL)