This patch cleans up the PWT & PCD bit manipulation in fbdev,
and uses _PAGE_CACHE_<type> macros, instead. This keeps the
fbdev code independent from the PAT slot assignment.
Signed-off-by: Toshi Kani <toshi.kani@xxxxxx>
---
arch/x86/include/asm/fb.h | 3 ++-
drivers/video/fbdev/gbefb.c | 3 ++-
drivers/video/fbdev/vermilion/vermilion.c | 4 ++--
3 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/arch/x86/include/asm/fb.h b/arch/x86/include/asm/fb.h
index 2519d06..05fa937 100644
--- a/arch/x86/include/asm/fb.h
+++ b/arch/x86/include/asm/fb.h
@@ -9,7 +9,8 @@ static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
unsigned long off)
{
if (boot_cpu_data.x86 > 3)
- pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
+ vma->vm_page_prot = pgprot_set_cache(vma->vm_page_prot,
+ _PAGE_CACHE_UC_MINUS);
}
extern int fb_is_primary_device(struct fb_info *info);
diff --git a/drivers/video/fbdev/gbefb.c b/drivers/video/fbdev/gbefb.c
index 4aa56ba..4af9ec7 100644
--- a/drivers/video/fbdev/gbefb.c
+++ b/drivers/video/fbdev/gbefb.c
@@ -54,7 +54,8 @@ struct gbefb_par {
#endif
#endif
#ifdef CONFIG_X86
-#define pgprot_fb(_prot) ((_prot) | _PAGE_PCD)
+/* NOTE: use _PAGE_CACHE_WT if desired */
+#define pgprot_fb(_prot) (((_prot) & ~_PAGE_CACHE_MASK) | _PAGE_CACHE_UC_MINUS)
#endif
/*
diff --git a/drivers/video/fbdev/vermilion/vermilion.c b/drivers/video/fbdev/vermilion/vermilion.c
index 048a666..6a7c744 100644
--- a/drivers/video/fbdev/vermilion/vermilion.c
+++ b/drivers/video/fbdev/vermilion/vermilion.c
@@ -1009,8 +1009,8 @@ static int vmlfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
if (ret)
return -EINVAL;
- pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
- pgprot_val(vma->vm_page_prot) &= ~_PAGE_PWT;
+ vma->vm_page_prot = pgprot_set_cache(vma->vm_page_prot,
+ _PAGE_CACHE_UC_MINUS);
return vm_iomap_memory(vma, vinfo->vram_start,
vinfo->vram_contig_size);
--
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