From d4edcf0d56958db0aca0196314ca38a5e730ea92 Mon Sep 17 00:00:00 2001 From: Dave Hansen Date: Fri, 12 Feb 2016 13:01:56 -0800 Subject: mm/gup: Switch all callers of get_user_pages() to not pass tsk/mm We will soon modify the vanilla get_user_pages() so it can no longer be used on mm/tasks other than 'current/current->mm', which is by far the most common way it is called. For now, we allow the old-style calls, but warn when they are used. (implemented in previous patch) This patch switches all callers of: get_user_pages() get_user_pages_unlocked() get_user_pages_locked() to stop passing tsk/mm so they will no longer see the warnings. Signed-off-by: Dave Hansen Reviewed-by: Thomas Gleixner Cc: Andrea Arcangeli Cc: Andrew Morton Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Dave Hansen Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Kirill A. Shutemov Cc: Linus Torvalds Cc: Naoya Horiguchi Cc: Peter Zijlstra Cc: Rik van Riel Cc: Srikar Dronamraju Cc: Vlastimil Babka Cc: jack@suse.cz Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20160212210156.113E9407@viggo.jf.intel.com Signed-off-by: Ingo Molnar --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 3 +-- drivers/gpu/drm/radeon/radeon_ttm.c | 3 +-- drivers/gpu/drm/via/via_dmablit.c | 3 +-- drivers/infiniband/core/umem.c | 2 +- drivers/infiniband/hw/mthca/mthca_memfree.c | 3 +-- drivers/infiniband/hw/qib/qib_user_pages.c | 3 +-- drivers/infiniband/hw/usnic/usnic_uiom.c | 2 +- drivers/media/pci/ivtv/ivtv-udma.c | 4 ++-- drivers/media/pci/ivtv/ivtv-yuv.c | 10 ++++------ drivers/media/v4l2-core/videobuf-dma-sg.c | 3 +-- drivers/misc/mic/scif/scif_rma.c | 2 -- drivers/misc/sgi-gru/grufault.c | 3 +-- drivers/scsi/st.c | 2 -- drivers/video/fbdev/pvr2fb.c | 4 ++-- drivers/virt/fsl_hypervisor.c | 5 ++--- 15 files changed, 19 insertions(+), 33 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 6442a06d6fdc..5fedfb68d7ca 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -518,8 +518,7 @@ static int amdgpu_ttm_tt_pin_userptr(struct ttm_tt *ttm) uint64_t userptr = gtt->userptr + pinned * PAGE_SIZE; struct page **pages = ttm->pages + pinned; - r = get_user_pages(current, current->mm, userptr, num_pages, - write, 0, pages, NULL); + r = get_user_pages(userptr, num_pages, write, 0, pages, NULL); if (r < 0) goto release_pages; diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index e34307459e50..927a9f2d6570 100644 --- a/drivers/gpu/drm/radeon/radeon_ttm.c +++ b/drivers/gpu/drm/radeon/radeon_ttm.c @@ -554,8 +554,7 @@ static int radeon_ttm_tt_pin_userptr(struct ttm_tt *ttm) uint64_t userptr = gtt->userptr + pinned * PAGE_SIZE; struct page **pages = ttm->pages + pinned; - r = get_user_pages(current, current->mm, userptr, num_pages, - write, 0, pages, NULL); + r = get_user_pages(userptr, num_pages, write, 0, pages, NULL); if (r < 0) goto release_pages; diff --git a/drivers/gpu/drm/via/via_dmablit.c b/drivers/gpu/drm/via/via_dmablit.c index d0cbd5ecd7f0..e797dfc07ae3 100644 --- a/drivers/gpu/drm/via/via_dmablit.c +++ b/drivers/gpu/drm/via/via_dmablit.c @@ -239,8 +239,7 @@ via_lock_all_dma_pages(drm_via_sg_info_t *vsg, drm_via_dmablit_t *xfer) if (NULL == vsg->pages) return -ENOMEM; down_read(¤t->mm->mmap_sem); - ret = get_user_pages(current, current->mm, - (unsigned long)xfer->mem_addr, + ret = get_user_pages((unsigned long)xfer->mem_addr, vsg->num_pages, (vsg->direction == DMA_FROM_DEVICE), 0, vsg->pages, NULL); diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c index 38acb3cfc545..fe4d2e1a8b58 100644 --- a/drivers/infiniband/core/umem.c +++ b/drivers/infiniband/core/umem.c @@ -188,7 +188,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr, sg_list_start = umem->sg_head.sgl; while (npages) { - ret = get_user_pages(current, current->mm, cur_base, + ret = get_user_pages(cur_base, min_t(unsigned long, npages, PAGE_SIZE / sizeof (struct page *)), 1, !umem->writable, page_list, vma_list); diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c b/drivers/infiniband/hw/mthca/mthca_memfree.c index 7d2e42dd6926..6c00d04b8b28 100644 --- a/drivers/infiniband/hw/mthca/mthca_memfree.c +++ b/drivers/infiniband/hw/mthca/mthca_memfree.c @@ -472,8 +472,7 @@ int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar, goto out; } - ret = get_user_pages(current, current->mm, uaddr & PAGE_MASK, 1, 1, 0, - pages, NULL); + ret = get_user_pages(uaddr & PAGE_MASK, 1, 1, 0, pages, NULL); if (ret < 0) goto out; diff --git a/drivers/infiniband/hw/qib/qib_user_pages.c b/drivers/infiniband/hw/qib/qib_user_pages.c index 74f90b2619f6..2d2b94fd3633 100644 --- a/drivers/infiniband/hw/qib/qib_user_pages.c +++ b/drivers/infiniband/hw/qib/qib_user_pages.c @@ -66,8 +66,7 @@ static int __qib_get_user_pages(unsigned long start_page, size_t num_pages, } for (got = 0; got < num_pages; got += ret) { - ret = get_user_pages(current, current->mm, - start_page + got * PAGE_SIZE, + ret = get_user_pages(start_page + got * PAGE_SIZE, num_pages - got, 1, 1, p + got, NULL); if (ret < 0) diff --git a/drivers/infiniband/hw/usnic/usnic_uiom.c b/drivers/infiniband/hw/usnic/usnic_uiom.c index 645a5f6e6c88..7209fbc03ccb 100644 --- a/drivers/infiniband/hw/usnic/usnic_uiom.c +++ b/drivers/infiniband/hw/usnic/usnic_uiom.c @@ -144,7 +144,7 @@ static int usnic_uiom_get_pages(unsigned long addr, size_t size, int writable, ret = 0; while (npages) { - ret = get_user_pages(current, current->mm, cur_base, + ret = get_user_pages(cur_base, min_t(unsigned long, npages, PAGE_SIZE / sizeof(struct page *)), 1, !writable, page_list, NULL); diff --git a/drivers/media/pci/ivtv/ivtv-udma.c b/drivers/media/pci/ivtv/ivtv-udma.c index 24152accc66c..4769469fe842 100644 --- a/drivers/media/pci/ivtv/ivtv-udma.c +++ b/drivers/media/pci/ivtv/ivtv-udma.c @@ -124,8 +124,8 @@ int ivtv_udma_setup(struct ivtv *itv, unsigned long ivtv_dest_addr, } /* Get user pages for DMA Xfer */ - err = get_user_pages_unlocked(current, current->mm, - user_dma.uaddr, user_dma.page_count, 0, 1, dma->map); + err = get_user_pages_unlocked(user_dma.uaddr, user_dma.page_count, 0, + 1, dma->map); if (user_dma.page_count != err) { IVTV_DEBUG_WARN("failed to map user pages, returned %d instead of %d\n", diff --git a/drivers/media/pci/ivtv/ivtv-yuv.c b/drivers/media/pci/ivtv/ivtv-yuv.c index 2b8e7b2f2b86..b094054cda6e 100644 --- a/drivers/media/pci/ivtv/ivtv-yuv.c +++ b/drivers/media/pci/ivtv/ivtv-yuv.c @@ -75,14 +75,12 @@ static int ivtv_yuv_prep_user_dma(struct ivtv *itv, struct ivtv_user_dma *dma, ivtv_udma_get_page_info (&uv_dma, (unsigned long)args->uv_source, 360 * uv_decode_height); /* Get user pages for DMA Xfer */ - y_pages = get_user_pages_unlocked(current, current->mm, - y_dma.uaddr, y_dma.page_count, 0, 1, - &dma->map[0]); + y_pages = get_user_pages_unlocked(y_dma.uaddr, + y_dma.page_count, 0, 1, &dma->map[0]); uv_pages = 0; /* silence gcc. value is set and consumed only if: */ if (y_pages == y_dma.page_count) { - uv_pages = get_user_pages_unlocked(current, current->mm, - uv_dma.uaddr, uv_dma.page_count, 0, 1, - &dma->map[y_pages]); + uv_pages = get_user_pages_unlocked(uv_dma.uaddr, + uv_dma.page_count, 0, 1, &dma->map[y_pages]); } if (y_pages != y_dma.page_count || uv_pages != uv_dma.page_count) { diff --git a/drivers/media/v4l2-core/videobuf-dma-sg.c b/drivers/media/v4l2-core/videobuf-dma-sg.c index f669cedca8bd..df4c052c6bd6 100644 --- a/drivers/media/v4l2-core/videobuf-dma-sg.c +++ b/drivers/media/v4l2-core/videobuf-dma-sg.c @@ -181,8 +181,7 @@ static int videobuf_dma_init_user_locked(struct videobuf_dmabuf *dma, dprintk(1, "init user [0x%lx+0x%lx => %d pages]\n", data, size, dma->nr_pages); - err = get_user_pages(current, current->mm, - data & PAGE_MASK, dma->nr_pages, + err = get_user_pages(data & PAGE_MASK, dma->nr_pages, rw == READ, 1, /* force */ dma->pages, NULL); diff --git a/drivers/misc/mic/scif/scif_rma.c b/drivers/misc/mic/scif/scif_rma.c index 8310b4dbff06..0fa0d242b295 100644 --- a/drivers/misc/mic/scif/scif_rma.c +++ b/drivers/misc/mic/scif/scif_rma.c @@ -1394,8 +1394,6 @@ retry: } pinned_pages->nr_pages = get_user_pages( - current, - mm, (u64)addr, nr_pages, !!(prot & SCIF_PROT_WRITE), diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c index f74fc0ca2ef9..a2d97b9b17e3 100644 --- a/drivers/misc/sgi-gru/grufault.c +++ b/drivers/misc/sgi-gru/grufault.c @@ -198,8 +198,7 @@ static int non_atomic_pte_lookup(struct vm_area_struct *vma, #else *pageshift = PAGE_SHIFT; #endif - if (get_user_pages - (current, current->mm, vaddr, 1, write, 0, &page, NULL) <= 0) + if (get_user_pages(vaddr, 1, write, 0, &page, NULL) <= 0) return -EFAULT; *paddr = page_to_phys(page); put_page(page); diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index 2e522951b619..664852af4417 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -4817,8 +4817,6 @@ static int sgl_map_user_pages(struct st_buffer *STbp, /* Try to fault in all of the necessary pages */ /* rw==READ means read from drive, write into memory area */ res = get_user_pages_unlocked( - current, - current->mm, uaddr, nr_pages, rw == READ, diff --git a/drivers/video/fbdev/pvr2fb.c b/drivers/video/fbdev/pvr2fb.c index 0e24eb9c219c..71a923e53f93 100644 --- a/drivers/video/fbdev/pvr2fb.c +++ b/drivers/video/fbdev/pvr2fb.c @@ -686,8 +686,8 @@ static ssize_t pvr2fb_write(struct fb_info *info, const char *buf, if (!pages) return -ENOMEM; - ret = get_user_pages_unlocked(current, current->mm, (unsigned long)buf, - nr_pages, WRITE, 0, pages); + ret = get_user_pages_unlocked((unsigned long)buf, nr_pages, WRITE, + 0, pages); if (ret < nr_pages) { nr_pages = ret; diff --git a/drivers/virt/fsl_hypervisor.c b/drivers/virt/fsl_hypervisor.c index 32c8fc5f7a5c..60bdad3a689b 100644 --- a/drivers/virt/fsl_hypervisor.c +++ b/drivers/virt/fsl_hypervisor.c @@ -244,9 +244,8 @@ static long ioctl_memcpy(struct fsl_hv_ioctl_memcpy __user *p) /* Get the physical addresses of the source buffer */ down_read(¤t->mm->mmap_sem); - num_pinned = get_user_pages(current, current->mm, - param.local_vaddr - lb_offset, num_pages, - (param.source == -1) ? READ : WRITE, + num_pinned = get_user_pages(param.local_vaddr - lb_offset, + num_pages, (param.source == -1) ? READ : WRITE, 0, pages, NULL); up_read(¤t->mm->mmap_sem); -- cgit