[SPARC]: Respect vm_page_prot in io_remap_page_range().

Make sure the callers do a pgprot_noncached() on
vma->vm_page_prot.

Pointed out by Hugh Dickens.

Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 5 insertions, 9 deletions

diff --git a/drivers/char/drm/drm_vm.c b/drivers/char/drm/drm_vm.c
index 0291cd62c69f..ffd0800ed601 100644
--- a/drivers/char/drm/drm_vm.c
+++ b/drivers/char/drm/drm_vm.c
@@ -619,6 +619,7 @@ int drm_mmap(struct file *filp, struct vm_area_struct *vma)
 #endif
                 offset = dev->driver->get_reg_ofs(dev);
 #ifdef __sparc__
+                vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
                 if (io_remap_pfn_range(DRM_RPR_ARG(vma) vma->vm_start,
                                        (map->offset + offset) >> PAGE_SHIFT,
                                        vma->vm_end - vma->vm_start,
diff --git a/drivers/sbus/char/flash.c b/drivers/sbus/char/flash.c
index 6bdd768b731d..2beb3dded087 100644
--- a/drivers/sbus/char/flash.c
+++ b/drivers/sbus/char/flash.c
@@ -71,9 +71,8 @@ flash_mmap(struct file *file, struct vm_area_struct *vma)
         if (vma->vm_end - (vma->vm_start + (vma->vm_pgoff << PAGE_SHIFT)) > size)
                 size = vma->vm_end - (vma->vm_start + (vma->vm_pgoff << PAGE_SHIFT));
 
-        pgprot_val(vma->vm_page_prot) &= ~(_PAGE_CACHE);
-        pgprot_val(vma->vm_page_prot) |= _PAGE_E;
         vma->vm_flags |= (VM_SHM | VM_LOCKED);
+        vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 
         if (io_remap_pfn_range(vma, vma->vm_start, addr, size, vma->vm_page_prot))
                 return -EAGAIN;
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 996c7b58564e..07d882b14396 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -1169,11 +1169,6 @@ fb_mmap(struct file *file, struct vm_area_struct * vma)
         vma->vm_pgoff = off >> PAGE_SHIFT;
         /* This is an IO map - tell maydump to skip this VMA */
         vma->vm_flags |= VM_IO | VM_RESERVED;
-#if defined(__sparc_v9__)
-        if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
-                                vma->vm_end - vma->vm_start, vma->vm_page_prot))
-                return -EAGAIN;
-#else
 #if defined(__mc68000__)
 #if defined(CONFIG_SUN3)
         pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE;
@@ -1195,7 +1190,7 @@ fb_mmap(struct file *file, struct vm_area_struct * vma)
 #elif defined(__i386__) || defined(__x86_64__)
         if (boot_cpu_data.x86 > 3)
                 pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
-#elif defined(__mips__)
+#elif defined(__mips__) || defined(__sparc_v9__)
         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 #elif defined(__hppa__)
         pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
@@ -1212,7 +1207,6 @@ fb_mmap(struct file *file, struct vm_area_struct * vma)
         if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
                              vma->vm_end - vma->vm_start, vma->vm_page_prot))
                 return -EAGAIN;
-#endif /* !__sparc_v9__ */
         return 0;
 #endif /* !sparc32 */
 }
diff --git a/drivers/video/sbuslib.c b/drivers/video/sbuslib.c
index a4d7cc51ce0b..34ef859ee414 100644
--- a/drivers/video/sbuslib.c
+++ b/drivers/video/sbuslib.c
@@ -58,6 +58,8 @@ int sbusfb_mmap_helper(struct sbus_mmap_map *map,
         /* To stop the swapper from even considering these pages */
         vma->vm_flags |= (VM_IO | VM_RESERVED);
         
+        vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
         /* Each page, see which map applies */
         for (page = 0; page < size; ){
                 map_size = 0;