From: Christoph Hellwig <hch@xxxxxx> Subject: 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. Link: http://lkml.kernel.org/r/20200414131348.444715-19-hch@xxxxxx Signed-off-by: Christoph Hellwig <hch@xxxxxx> Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Cc: Christian Borntraeger <borntraeger@xxxxxxxxxx> Cc: Christophe Leroy <christophe.leroy@xxxxxx> Cc: Daniel Vetter <daniel@xxxxxxxx> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> Cc: David Airlie <airlied@xxxxxxxx> Cc: Gao Xiang <xiang@xxxxxxxxxx> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Cc: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx> Cc: Johannes Weiner <hannes@xxxxxxxxxxx> Cc: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx> Cc: Laura Abbott <labbott@xxxxxxxxxx> Cc: Mark Rutland <mark.rutland@xxxxxxx> Cc: Michael Kelley <mikelley@xxxxxxxxxxxxx> Cc: Minchan Kim <minchan@xxxxxxxxxx> Cc: Nitin Gupta <ngupta@xxxxxxxxxx> Cc: Robin Murphy <robin.murphy@xxxxxxx> Cc: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx> Cc: Stephen Hemminger <sthemmin@xxxxxxxxxxxxx> Cc: Sumit Semwal <sumit.semwal@xxxxxxxxxx> Cc: Wei Liu <wei.liu@xxxxxxxxxx> Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> Cc: Catalin Marinas <catalin.marinas@xxxxxxx> Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx> Cc: Paul Mackerras <paulus@xxxxxxxxxx> Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx> Cc: Will Deacon <will@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- 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(-) --- a/drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c~mm-remove-the-prot-argument-from-vm_map_ram +++ a/drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c @@ -66,7 +66,7 @@ static void *mock_dmabuf_vmap(struct dma { 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) --- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c~mm-remove-the-prot-argument-from-vm_map_ram +++ a/drivers/media/common/videobuf2/videobuf2-dma-sg.c @@ -309,8 +309,7 @@ static void *vb2_dma_sg_vaddr(void *buf_ 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 */ --- a/drivers/media/common/videobuf2/videobuf2-vmalloc.c~mm-remove-the-prot-argument-from-vm_map_ram +++ a/drivers/media/common/videobuf2/videobuf2-vmalloc.c @@ -107,8 +107,7 @@ static void *vb2_vmalloc_get_userptr(str 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) --- a/fs/erofs/decompressor.c~mm-remove-the-prot-argument-from-vm_map_ram +++ a/fs/erofs/decompressor.c @@ -274,7 +274,7 @@ static int z_erofs_decompress_generic(st 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) --- a/fs/xfs/xfs_buf.c~mm-remove-the-prot-argument-from-vm_map_ram +++ a/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(); --- a/include/linux/vmalloc.h~mm-remove-the-prot-argument-from-vm_map_ram +++ a/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 --- a/mm/nommu.c~mm-remove-the-prot-argument-from-vm_map_ram +++ a/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; --- a/mm/vmalloc.c~mm-remove-the-prot-argument-from-vm_map_ram +++ a/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, un 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; } _
