[PATCH 18/29] mm: remove the prot argument from vm_map_ram

From: Christoph Hellwig
Date: Tue Apr 14 2020 - 09:38:53 EST


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

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c | 2 +-
drivers/media/common/videobuf2/videobuf2-dma-sg.c | 3 +--
drivers/media/common/videobuf2/videobuf2-vmalloc.c | 3 +--
fs/erofs/decompressor.c | 2 +-
fs/xfs/xfs_buf.c | 2 +-
include/linux/vmalloc.h | 3 +--
mm/nommu.c | 2 +-
mm/vmalloc.c | 4 ++--
8 files changed, 9 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c b/drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c
index 9272bef57092..debaf7b18ab5 100644
--- a/drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c
+++ b/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)
diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
index 6db60e9d5183..92072a08af25 100644
--- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c
+++ b/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 */
diff --git a/drivers/media/common/videobuf2/videobuf2-vmalloc.c b/drivers/media/common/videobuf2/videobuf2-vmalloc.c
index 1a4f0ca87c7c..c66fda4a65e4 100644
--- a/drivers/media/common/videobuf2/videobuf2-vmalloc.c
+++ b/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)
diff --git a/fs/erofs/decompressor.c b/fs/erofs/decompressor.c
index 5d2d81940679..7628816f2453 100644
--- a/fs/erofs/decompressor.c
+++ b/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)
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 9ec3eaf1c618..65538d18e64f 100644
--- a/fs/xfs/xfs_buf.c
+++ b/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();
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 15ffbd8e8e65..9273b1a91ca5 100644
--- a/include/linux/vmalloc.h
+++ b/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
diff --git a/mm/nommu.c b/mm/nommu.c
index 318df4e236c9..4f07b7ef0297 100644
--- a/mm/nommu.c
+++ b/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;
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 258220b203f1..7356b3f07bd8 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1834,7 +1834,7 @@ 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;
@@ -1858,7 +1858,7 @@ 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;
}
--
2.25.1