powerpc: Get USE_STRICT_MM_TYPECHECKS working again
The typesafe version of the powerpc pagetable handling (with
USE_STRICT_MM_TYPECHECKS defined) has bitrotted again. This patch
makes a bunch of small fixes to get it back to building status.
It's still not enabled by default as gcc still generates worse
code with it for some reason.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/include/asm/pgtable-ppc32.h b/arch/powerpc/include/asm/pgtable-ppc32.h
index 29c83d8..6ab7c67 100644
--- a/arch/powerpc/include/asm/pgtable-ppc32.h
+++ b/arch/powerpc/include/asm/pgtable-ppc32.h
@@ -431,11 +431,11 @@
#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
-#define PAGE_PROT_BITS __pgprot(_PAGE_GUARDED | _PAGE_COHERENT | _PAGE_NO_CACHE | \
- _PAGE_WRITETHRU | _PAGE_ENDIAN | \
- _PAGE_USER | _PAGE_ACCESSED | \
- _PAGE_RW | _PAGE_HWWRITE | _PAGE_DIRTY | \
- _PAGE_EXEC | _PAGE_HWEXEC)
+#define PAGE_PROT_BITS (_PAGE_GUARDED | _PAGE_COHERENT | _PAGE_NO_CACHE | \
+ _PAGE_WRITETHRU | _PAGE_ENDIAN | \
+ _PAGE_USER | _PAGE_ACCESSED | \
+ _PAGE_RW | _PAGE_HWWRITE | _PAGE_DIRTY | \
+ _PAGE_EXEC | _PAGE_HWEXEC)
/*
* Note: the _PAGE_COHERENT bit automatically gets set in the hardware
* PTE if CONFIG_SMP is defined (hash_page does this); there is no need
@@ -570,9 +570,9 @@
pte_val(pte) |= _PAGE_ACCESSED; return pte; }
static inline pte_t pte_mkspecial(pte_t pte) {
pte_val(pte) |= _PAGE_SPECIAL; return pte; }
-static inline unsigned long pte_pgprot(pte_t pte)
+static inline pgprot_t pte_pgprot(pte_t pte)
{
- return __pgprot(pte_val(pte)) & PAGE_PROT_BITS;
+ return __pgprot(pte_val(pte) & PAGE_PROT_BITS);
}
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
@@ -688,7 +688,8 @@
: "=m" (*ptep), "=m" (*((unsigned char *)ptep+4))
: "r" (pte) : "memory");
#else
- *ptep = (*ptep & _PAGE_HASHPTE) | (pte & ~_PAGE_HASHPTE);
+ *ptep = __pte((pte_val(*ptep) & _PAGE_HASHPTE)
+ | (pte_val(pte) & ~_PAGE_HASHPTE));
#endif
}