drm: remove drm specific kmap_atomic code

kmap_atomic_prot() is now exported by all architectures. Use this
function rather than open coding a driver specific kmap_atomic.

[[e-mail]: include linux/highmem.h]
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Ira Weiny <[e-mail]>
Signed-off-by: Arnd Bergmann <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Reviewed-by: Christian König <[e-mail]>
Reviewed-by: Christoph Hellwig <[e-mail]>
Acked-by: Daniel Vetter <[e-mail]>
Cc: Al Viro <[e-mail]>
Cc: Andy Lutomirski <[e-mail]>
Cc: Benjamin Herrenschmidt <[e-mail]>
Cc: Borislav Petkov <[e-mail]>
Cc: Chris Zankel <[e-mail]>
Cc: Dan Williams <[e-mail]>
Cc: Dave Hansen <[e-mail]>
Cc: "David S. Miller" <[e-mail]>
Cc: Helge Deller <[e-mail]>
Cc: "H. Peter Anvin" <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: "James E.J. Bottomley" <[e-mail]>
Cc: Max Filippov <[e-mail]>
Cc: Paul Mackerras <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Thomas Bogendoerfer <[e-mail]>
Cc: Thomas Gleixner <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/gpu/drm/ttm/ttm_bo_util.c

···
 	return 0;
 }
 
-#ifdef CONFIG_X86
-#define __ttm_kmap_atomic_prot(__page, __prot) kmap_atomic_prot(__page, __prot)
-#define __ttm_kunmap_atomic(__addr) kunmap_atomic(__addr)
-#else
-#define __ttm_kmap_atomic_prot(__page, __prot) vmap(&__page, 1, 0,  __prot)
-#define __ttm_kunmap_atomic(__addr) vunmap(__addr)
-#endif
-
-
-/**
- * ttm_kmap_atomic_prot - Efficient kernel map of a single page with
- * specified page protection.
- *
- * @page: The page to map.
- * @prot: The page protection.
- *
- * This function maps a TTM page using the kmap_atomic api if available,
- * otherwise falls back to vmap. The user must make sure that the
- * specified page does not have an aliased mapping with a different caching
- * policy unless the architecture explicitly allows it. Also mapping and
- * unmapping using this api must be correctly nested. Unmapping should
- * occur in the reverse order of mapping.
- */
-void *ttm_kmap_atomic_prot(struct page *page, pgprot_t prot)
-{
-	if (pgprot_val(prot) == pgprot_val(PAGE_KERNEL))
-		return kmap_atomic(page);
-	else
-		return __ttm_kmap_atomic_prot(page, prot);
-}
-EXPORT_SYMBOL(ttm_kmap_atomic_prot);
-
-/**
- * ttm_kunmap_atomic_prot - Unmap a page that was mapped using
- * ttm_kmap_atomic_prot.
- *
- * @addr: The virtual address from the map.
- * @prot: The page protection.
- */
-void ttm_kunmap_atomic_prot(void *addr, pgprot_t prot)
-{
-	if (pgprot_val(prot) == pgprot_val(PAGE_KERNEL))
-		kunmap_atomic(addr);
-	else
-		__ttm_kunmap_atomic(addr);
-}
-EXPORT_SYMBOL(ttm_kunmap_atomic_prot);
-
 static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src,
 				unsigned long page,
 				pgprot_t prot)
···
 		return -ENOMEM;
 
 	src = (void *)((unsigned long)src + (page << PAGE_SHIFT));
-	dst = ttm_kmap_atomic_prot(d, prot);
+	dst = kmap_atomic_prot(d, prot);
 	if (!dst)
 		return -ENOMEM;
 
 	memcpy_fromio(dst, src, PAGE_SIZE);
 
-	ttm_kunmap_atomic_prot(dst, prot);
+	kunmap_atomic(dst);
 
 	return 0;
 }
···
 		return -ENOMEM;
 
 	dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
-	src = ttm_kmap_atomic_prot(s, prot);
+	src = kmap_atomic_prot(s, prot);
 	if (!src)
 		return -ENOMEM;
 
 	memcpy_toio(dst, src, PAGE_SIZE);
 
-	ttm_kunmap_atomic_prot(src, prot);
+	kunmap_atomic(src);
 
 	return 0;
 }

drivers/gpu/drm/vmwgfx/vmwgfx_blit.c

···
  **************************************************************************/
 
 #include "vmwgfx_drv.h"
+#include <linux/highmem.h>
 
 /*
  * Template that implements find_first_diff() for a generic
···
 		copy_size = min_t(u32, copy_size, PAGE_SIZE - src_page_offset);
 
 		if (unmap_src) {
-			ttm_kunmap_atomic_prot(d->src_addr, d->src_prot);
+			kunmap_atomic(d->src_addr);
 			d->src_addr = NULL;
 		}
 
 		if (unmap_dst) {
-			ttm_kunmap_atomic_prot(d->dst_addr, d->dst_prot);
+			kunmap_atomic(d->dst_addr);
 			d->dst_addr = NULL;
 		}
 
···
 				return -EINVAL;
 
 			d->dst_addr =
-				ttm_kmap_atomic_prot(d->dst_pages[dst_page],
-						     d->dst_prot);
+				kmap_atomic_prot(d->dst_pages[dst_page],
+						 d->dst_prot);
 			if (!d->dst_addr)
 				return -ENOMEM;
 
···
 				return -EINVAL;
 
 			d->src_addr =
-				ttm_kmap_atomic_prot(d->src_pages[src_page],
-						     d->src_prot);
+				kmap_atomic_prot(d->src_pages[src_page],
+						 d->src_prot);
 			if (!d->src_addr)
 				return -ENOMEM;
 
···
 	}
 out:
 	if (d.src_addr)
-		ttm_kunmap_atomic_prot(d.src_addr, d.src_prot);
+		kunmap_atomic(d.src_addr);
 	if (d.dst_addr)
-		ttm_kunmap_atomic_prot(d.dst_addr, d.dst_prot);
+		kunmap_atomic(d.dst_addr);
 
 	return ret;
 }

include/drm/ttm/ttm_bo_api.h

···
 int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
 		struct ttm_bo_device *bdev);
 
-void *ttm_kmap_atomic_prot(struct page *page, pgprot_t prot);
-
-void ttm_kunmap_atomic_prot(void *addr, pgprot_t prot);
-
 /**
  * ttm_bo_io
  *