mm: remove the prot argument from vm_map_ram

This is always PAGE_KERNEL - for long term mappings with other properties
vmap should be used.

Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Christian Borntraeger <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Gao Xiang <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Haiyang Zhang <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: "K. Y. Srinivasan" <[email protected]>
Cc: Laura Abbott <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Michael Kelley <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Nitin Gupta <[email protected]>
Cc: Robin Murphy <[email protected]>
Cc: Sakari Ailus <[email protected]>
Cc: Stephen Hemminger <[email protected]>
Cc: Sumit Semwal <[email protected]>
Cc: Wei Liu <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Vasily Gorbik <[email protected]>
Cc: Will Deacon <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>

Author: Christoph Hellwig

drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c

@@ -66,7 +66,7 @@ static void *mock_dmabuf_vmap(struct dma_buf *dma_buf)
 {
 	struct mock_dmabuf *mock = to_mock(dma_buf);
 
-	return vm_map_ram(mock->pages, mock->npages, 0, PAGE_KERNEL);
+	return vm_map_ram(mock->pages, mock->npages, 0);
 }
 
 static void mock_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr)

drivers/media/common/videobuf2/videobuf2-dma-sg.c

@@ -309,8 +309,7 @@ static void *vb2_dma_sg_vaddr(void *buf_priv)
 		if (buf->db_attach)
 			buf->vaddr = dma_buf_vmap(buf->db_attach->dmabuf);
 		else
-			buf->vaddr = vm_map_ram(buf->pages,
-					buf->num_pages, -1, PAGE_KERNEL);
+			buf->vaddr = vm_map_ram(buf->pages, buf->num_pages, -1);
 	}
 
 	/* add offset in case userptr is not page-aligned */

drivers/media/common/videobuf2/videobuf2-vmalloc.c

@@ -107,8 +107,7 @@ static void *vb2_vmalloc_get_userptr(struct device *dev, unsigned long vaddr,
 		buf->vaddr = (__force void *)
 			ioremap(__pfn_to_phys(nums[0]), size + offset);
 	} else {
-		buf->vaddr = vm_map_ram(frame_vector_pages(vec), n_pages, -1,
-					PAGE_KERNEL);
+		buf->vaddr = vm_map_ram(frame_vector_pages(vec), n_pages, -1);
 	}
 
 	if (!buf->vaddr)

fs/erofs/decompressor.c

@@ -274,7 +274,7 @@ static int z_erofs_decompress_generic(struct z_erofs_decompress_req *rq,
 
 	i = 0;
 	while (1) {
-		dst = vm_map_ram(rq->out, nrpages_out, -1, PAGE_KERNEL);
+		dst = vm_map_ram(rq->out, nrpages_out, -1);
 
 		/* retry two more times (totally 3 times) */
 		if (dst || ++i >= 3)

fs/xfs/xfs_buf.c

@@ -477,7 +477,7 @@ _xfs_buf_map_pages(
 		nofs_flag = memalloc_nofs_save();
 		do {
 			bp->b_addr = vm_map_ram(bp->b_pages, bp->b_page_count,
-						-1, PAGE_KERNEL);
+						-1);
 			if (bp->b_addr)
 				break;
 			vm_unmap_aliases();

include/linux/vmalloc.h

@@ -88,8 +88,7 @@ struct vmap_area {
  *	Highlevel APIs for driver use
  */
 extern void vm_unmap_ram(const void *mem, unsigned int count);
-extern void *vm_map_ram(struct page **pages, unsigned int count,
-				int node, pgprot_t prot);
+extern void *vm_map_ram(struct page **pages, unsigned int count, int node);
 extern void vm_unmap_aliases(void);
 
 #ifdef CONFIG_MMU

mm/nommu.c

@@ -351,7 +351,7 @@ void vunmap(const void *addr)
 }
 EXPORT_SYMBOL(vunmap);
 
-void *vm_map_ram(struct page **pages, unsigned int count, int node, pgprot_t prot)
+void *vm_map_ram(struct page **pages, unsigned int count, int node)
 {
 	BUG();
 	return NULL;

mm/vmalloc.c

@@ -1835,7 +1835,7 @@ EXPORT_SYMBOL(vm_unmap_ram);
  *
  * Returns: a pointer to the address that has been mapped, or %NULL on failure
  */
-void *vm_map_ram(struct page **pages, unsigned int count, int node, pgprot_t prot)
+void *vm_map_ram(struct page **pages, unsigned int count, int node)
 {
 	unsigned long size = (unsigned long)count << PAGE_SHIFT;
 	unsigned long addr;
@@ -1859,7 +1859,7 @@ void *vm_map_ram(struct page **pages, unsigned int count, int node, pgprot_t pro
 
 	kasan_unpoison_vmalloc(mem, size);
 
-	if (map_kernel_range(addr, size, prot, pages) < 0) {
+	if (map_kernel_range(addr, size, PAGE_KERNEL, pages) < 0) {
 		vm_unmap_ram(mem, count);
 		return NULL;
 	}