From: Hugh Dickins Date: Mon, 27 Jun 2011 23:18:19 +0000 (-0700) Subject: drm/i915: use shmem_truncate_range X-Git-Tag: upstream/snapshot3+hdmi~9772 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e2377fe0b65e3c7577ff6df1701c56ef477d336f;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git drm/i915: use shmem_truncate_range The interface to ->truncate_range is changing very slightly: once "tmpfs: take control of its truncate_range" has been applied, this can be applied. For now there is only a slight inefficiency while this remains unapplied, but it will soon become essential for managing shmem's use of swap. Change i915_gem_object_truncate() to use shmem_truncate_range() directly: which should also spare i915 later change if we switch from inode_operations->truncate_range to file_operations->fallocate. Signed-off-by: Hugh Dickins Cc: Christoph Hellwig Cc: Chris Wilson Cc: Keith Packard Cc: Dave Airlie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index fa560ce..85f7137 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1696,13 +1696,10 @@ i915_gem_object_truncate(struct drm_i915_gem_object *obj) /* Our goal here is to return as much of the memory as * is possible back to the system as we are called from OOM. * To do this we must instruct the shmfs to drop all of its - * backing pages, *now*. Here we mirror the actions taken - * when by shmem_delete_inode() to release the backing store. + * backing pages, *now*. */ inode = obj->base.filp->f_path.dentry->d_inode; - truncate_inode_pages(inode->i_mapping, 0); - if (inode->i_op->truncate_range) - inode->i_op->truncate_range(inode, 0, (loff_t)-1); + shmem_truncate_range(inode, 0, (loff_t)-1); obj->madv = __I915_MADV_PURGED; }