powerpc: handover page flags with a pgprot_t parameter

In order to avoid multiple conversions, handover directly a
pgprot_t to map_kernel_page() as already done for radix.

Do the same for __ioremap_caller() and __ioremap_at().

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 18 insertions, 19 deletions

diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index 1f1bb40555a8..b0f4a4b4f62b 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -113,13 +113,12 @@ unsigned long ioremap_bot = IOREMAP_BASE;
  * __ioremap_at - Low level function to establish the page tables
  *                for an IO mapping
  */
-void __iomem * __ioremap_at(phys_addr_t pa, void *ea, unsigned long size,
-			    unsigned long flags)
+void __iomem *__ioremap_at(phys_addr_t pa, void *ea, unsigned long size, pgprot_t prot)
 {
 	unsigned long i;
 
 	/* We don't support the 4K PFN hack with ioremap */
-	if (flags & H_PAGE_4K_PFN)
+	if (pgprot_val(prot) & H_PAGE_4K_PFN)
 		return NULL;
 
 	WARN_ON(pa & ~PAGE_MASK);
@@ -127,7 +126,7 @@ void __iomem * __ioremap_at(phys_addr_t pa, void *ea, unsigned long size,
 	WARN_ON(size & ~PAGE_MASK);
 
 	for (i = 0; i < size; i += PAGE_SIZE)
-		if (map_kernel_page((unsigned long)ea+i, pa+i, flags))
+		if (map_kernel_page((unsigned long)ea + i, pa + i, prot))
 			return NULL;
 
 	return (void __iomem *)ea;
@@ -148,7 +147,7 @@ void __iounmap_at(void *ea, unsigned long size)
 }
 
 void __iomem * __ioremap_caller(phys_addr_t addr, unsigned long size,
-				unsigned long flags, void *caller)
+				pgprot_t prot, void *caller)
 {
 	phys_addr_t paligned;
 	void __iomem *ret;
@@ -178,11 +177,11 @@ void __iomem * __ioremap_caller(phys_addr_t addr, unsigned long size,
 			return NULL;
 
 		area->phys_addr = paligned;
-		ret = __ioremap_at(paligned, area->addr, size, flags);
+		ret = __ioremap_at(paligned, area->addr, size, prot);
 		if (!ret)
 			vunmap(area->addr);
 	} else {
-		ret = __ioremap_at(paligned, (void *)ioremap_bot, size, flags);
+		ret = __ioremap_at(paligned, (void *)ioremap_bot, size, prot);
 		if (ret)
 			ioremap_bot += size;
 	}
@@ -195,37 +194,37 @@ void __iomem * __ioremap_caller(phys_addr_t addr, unsigned long size,
 void __iomem * __ioremap(phys_addr_t addr, unsigned long size,
 			 unsigned long flags)
 {
-	return __ioremap_caller(addr, size, flags, __builtin_return_address(0));
+	return __ioremap_caller(addr, size, __pgprot(flags), __builtin_return_address(0));
 }
 
 void __iomem * ioremap(phys_addr_t addr, unsigned long size)
 {
-	unsigned long flags = pgprot_val(pgprot_noncached(PAGE_KERNEL));
+	pgprot_t prot = pgprot_noncached(PAGE_KERNEL);
 	void *caller = __builtin_return_address(0);
 
 	if (ppc_md.ioremap)
-		return ppc_md.ioremap(addr, size, flags, caller);
-	return __ioremap_caller(addr, size, flags, caller);
+		return ppc_md.ioremap(addr, size, prot, caller);
+	return __ioremap_caller(addr, size, prot, caller);
 }
 
 void __iomem * ioremap_wc(phys_addr_t addr, unsigned long size)
 {
-	unsigned long flags = pgprot_val(pgprot_noncached_wc(PAGE_KERNEL));
+	pgprot_t prot = pgprot_noncached_wc(PAGE_KERNEL);
 	void *caller = __builtin_return_address(0);
 
 	if (ppc_md.ioremap)
-		return ppc_md.ioremap(addr, size, flags, caller);
-	return __ioremap_caller(addr, size, flags, caller);
+		return ppc_md.ioremap(addr, size, prot, caller);
+	return __ioremap_caller(addr, size, prot, caller);
 }
 
 void __iomem *ioremap_coherent(phys_addr_t addr, unsigned long size)
 {
-	unsigned long flags = pgprot_val(pgprot_cached(PAGE_KERNEL));
+	pgprot_t prot = pgprot_cached(PAGE_KERNEL);
 	void *caller = __builtin_return_address(0);
 
 	if (ppc_md.ioremap)
-		return ppc_md.ioremap(addr, size, flags, caller);
-	return __ioremap_caller(addr, size, flags, caller);
+		return ppc_md.ioremap(addr, size, prot, caller);
+	return __ioremap_caller(addr, size, prot, caller);
 }
 
 void __iomem * ioremap_prot(phys_addr_t addr, unsigned long size,
@@ -246,8 +245,8 @@ void __iomem * ioremap_prot(phys_addr_t addr, unsigned long size,
 	flags |= _PAGE_PRIVILEGED;
 
 	if (ppc_md.ioremap)
-		return ppc_md.ioremap(addr, size, flags, caller);
-	return __ioremap_caller(addr, size, flags, caller);
+		return ppc_md.ioremap(addr, size, __pgprot(flags), caller);
+	return __ioremap_caller(addr, size, __pgprot(flags), caller);
 }