diff options
| author | Lorenzo Stoakes <lstoakes@gmail.com> | 2016-10-13 01:20:16 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-17 21:55:16 +0100 |
| commit | 8e50b8b07f462ab4b91bc1491b1c91bd75e4ad40 (patch) | |
| tree | 8d8e4110fcbdad29416f5fa7ad3a512a6ff8cec8 /drivers/gpu | |
| parent | 3ec22a6bce3f06aa3b8a399ea456fb1cb3792584 (diff) | |
mm: replace get_user_pages() write/force parameters with gup_flags
commit 768ae309a96103ed02eb1e111e838c87854d8b51 upstream.
This removes the 'write' and 'force' from get_user_pages() and replaces
them with 'gup_flags' to make the use of FOLL_FORCE explicit in callers
as use of this flag can result in surprising behaviour (and hence bugs)
within the mm subsystem.
Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[bwh: Backported to 4.4:
- Drop changes in rapidio, vchiq, goldfish
- Keep the "write" variable in amdgpu_ttm_tt_pin_userptr() as it's still
needed
- Also update calls from various other places that now use
get_user_pages_remote() upstream, which were updated there by commit
9beae1ea8930 "mm: replace get_user_pages_remote() write/force ..."
- Also update calls from hfi1 and ipath
- Adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_userptr.c | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_ttm.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/via/via_dmablit.c | 4 |
4 files changed, 13 insertions, 5 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index e40a6d8b0b92..062c23125b2a 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -496,9 +496,13 @@ static int amdgpu_ttm_tt_pin_userptr(struct ttm_tt *ttm) int r; int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY); + unsigned int flags = 0; enum dma_data_direction direction = write ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE; + if (write) + flags |= FOLL_WRITE; + if (current->mm != gtt->usermm) return -EPERM; @@ -519,7 +523,7 @@ static int amdgpu_ttm_tt_pin_userptr(struct ttm_tt *ttm) struct page **pages = ttm->pages + pinned; r = get_user_pages(current, current->mm, userptr, num_pages, - write, 0, pages, NULL); + flags, pages, NULL); if (r < 0) goto release_pages; diff --git a/drivers/gpu/drm/i915/i915_gem_userptr.c b/drivers/gpu/drm/i915/i915_gem_userptr.c index 359fe2b8bb8a..b02113b57d51 100644 --- a/drivers/gpu/drm/i915/i915_gem_userptr.c +++ b/drivers/gpu/drm/i915/i915_gem_userptr.c @@ -581,13 +581,17 @@ __i915_gem_userptr_get_pages_worker(struct work_struct *_work) pvec = drm_malloc_ab(npages, sizeof(struct page *)); if (pvec != NULL) { struct mm_struct *mm = obj->userptr.mm->mm; + unsigned int flags = 0; + + if (!obj->userptr.read_only) + flags |= FOLL_WRITE; down_read(&mm->mmap_sem); while (pinned < npages) { ret = get_user_pages(work->task, mm, obj->userptr.ptr + pinned * PAGE_SIZE, npages - pinned, - !obj->userptr.read_only, 0, + flags, pvec + pinned, NULL); if (ret < 0) break; diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index d684e2b79d2b..0c380fe77382 100644 --- a/drivers/gpu/drm/radeon/radeon_ttm.c +++ b/drivers/gpu/drm/radeon/radeon_ttm.c @@ -557,7 +557,7 @@ static int radeon_ttm_tt_pin_userptr(struct ttm_tt *ttm) struct page **pages = ttm->pages + pinned; r = get_user_pages(current, current->mm, userptr, num_pages, - write, 0, pages, NULL); + write ? FOLL_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..4459cb32d1fe 100644 --- a/drivers/gpu/drm/via/via_dmablit.c +++ b/drivers/gpu/drm/via/via_dmablit.c @@ -242,8 +242,8 @@ via_lock_all_dma_pages(drm_via_sg_info_t *vsg, drm_via_dmablit_t *xfer) ret = get_user_pages(current, current->mm, (unsigned long)xfer->mem_addr, vsg->num_pages, - (vsg->direction == DMA_FROM_DEVICE), - 0, vsg->pages, NULL); + (vsg->direction == DMA_FROM_DEVICE) ? FOLL_WRITE : 0, + vsg->pages, NULL); up_read(¤t->mm->mmap_sem); if (ret != vsg->num_pages) { |