powerpc: Replace find_linux_pte with find_linux_pte_or_hugepte
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>
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 2f47080..e8434ca 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -1145,6 +1145,7 @@
void hash_preload(struct mm_struct *mm, unsigned long ea,
unsigned long access, unsigned long trap)
{
+ int hugepage_shift;
unsigned long vsid;
pgd_t *pgdir;
pte_t *ptep;
@@ -1166,10 +1167,15 @@
pgdir = mm->pgd;
if (pgdir == NULL)
return;
- ptep = find_linux_pte(pgdir, ea);
+ /*
+ * THP pages use update_mmu_cache_pmd. We don't do
+ * hash preload there. Hence can ignore THP here
+ */
+ ptep = find_linux_pte_or_hugepte(pgdir, ea, &hugepage_shift);
if (!ptep)
return;
+ WARN_ON(hugepage_shift);
#ifdef CONFIG_PPC_64K_PAGES
/* If either _PAGE_4K_PFN or _PAGE_NO_CACHE is set (and we are on
* a 64K kernel), then we don't preload, hash_page() will take