On Thu, Dec 22, 2016 at 08:36:29AM +0000, Chris Wilson wrote:
> The scan state occupies a large proportion of the struct drm_mm and is
> rarely used and only contains temporary state. That makes it suitable to
> moving to its struct and onto the stack of the callers.
>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Applied to drm-misc, after fixing a missed scan_remove_block in
etnaviv_mmu.c. For the future please also cc: driver maintainers so they
can ack this.
I have some bikesheds on the kernel-doc (or lack thereof for drm_mm_scan),
but I think I'll review the entire thing at the end and then send a patch.
Thanks, Daniel
> ---
> drivers/gpu/drm/drm_mm.c | 124 ++++++++++++++++++--------------
> drivers/gpu/drm/etnaviv/etnaviv_mmu.c | 7 +-
> drivers/gpu/drm/i915/i915_gem_evict.c | 19 +++--
> drivers/gpu/drm/selftests/test-drm_mm.c | 45 ++++++------
> include/drm/drm_mm.h | 43 +++++++----
> 5 files changed, 138 insertions(+), 100 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
> index b80305484124..21bd2e13738b 100644
> --- a/drivers/gpu/drm/drm_mm.c
> +++ b/drivers/gpu/drm/drm_mm.c
> @@ -574,7 +574,7 @@ static struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
> u64 adj_end;
> u64 best_size;
>
> - DRM_MM_BUG_ON(mm->scanned_blocks);
> + DRM_MM_BUG_ON(mm->scan_active);
>
> best = NULL;
> best_size = ~0UL;
> @@ -618,7 +618,7 @@ static struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct drm_
> u64 adj_end;
> u64 best_size;
>
> - DRM_MM_BUG_ON(mm->scanned_blocks);
> + DRM_MM_BUG_ON(mm->scan_active);
>
> best = NULL;
> best_size = ~0UL;
> @@ -693,7 +693,7 @@ EXPORT_SYMBOL(drm_mm_replace_node);
> *
> * The DRM range allocator supports this use-case through the scanning
> * interfaces. First a scan operation needs to be initialized with
> - * drm_mm_init_scan() or drm_mm_init_scan_with_range(). The driver adds
> + * drm_mm_scan_init() or drm_mm_scan_init_with_range(). The driver adds
> * objects to the roaster (probably by walking an LRU list, but this can be
> * freely implemented) until a suitable hole is found or there's no further
> * evictable object.
> @@ -710,7 +710,8 @@ EXPORT_SYMBOL(drm_mm_replace_node);
> */
>
> /**
> - * drm_mm_init_scan - initialize lru scanning
> + * drm_mm_scan_init - initialize lru scanning
> + * @scan: scan state
> * @mm: drm_mm to scan
> * @size: size of the allocation
> * @alignment: alignment of the allocation
> @@ -724,26 +725,33 @@ EXPORT_SYMBOL(drm_mm_replace_node);
> * As long as the scan list is non-empty, no other operations than
> * adding/removing nodes to/from the scan list are allowed.
> */
> -void drm_mm_init_scan(struct drm_mm *mm,
> +void drm_mm_scan_init(struct drm_mm_scan *scan,
> + struct drm_mm *mm,
> u64 size,
> u64 alignment,
> unsigned long color)
> {
> DRM_MM_BUG_ON(!size);
> + DRM_MM_BUG_ON(mm->scan_active);
>
> - mm->scan_color = color;
> - mm->scan_alignment = alignment;
> - mm->scan_size = size;
> - mm->scanned_blocks = 0;
> - mm->scan_hit_start = 0;
> - mm->scan_hit_end = 0;
> - mm->scan_check_range = 0;
> - mm->prev_scanned_node = NULL;
> + scan->mm = mm;
> +
> + scan->color = color;
> + scan->alignment = alignment;
> + scan->size = size;
> +
> + scan->check_range = 0;
> +
> + scan->hit_start = U64_MAX;
> + scan->hit_end = 0;
> +
> + scan->prev_scanned_node = NULL;
> }
> -EXPORT_SYMBOL(drm_mm_init_scan);
> +EXPORT_SYMBOL(drm_mm_scan_init);
>
> /**
> - * drm_mm_init_scan - initialize range-restricted lru scanning
> + * drm_mm_scan_init_with_range - initialize range-restricted lru scanning
> + * @scan: scan state
> * @mm: drm_mm to scan
> * @size: size of the allocation
> * @alignment: alignment of the allocation
> @@ -759,7 +767,8 @@ EXPORT_SYMBOL(drm_mm_init_scan);
> * As long as the scan list is non-empty, no other operations than
> * adding/removing nodes to/from the scan list are allowed.
> */
> -void drm_mm_init_scan_with_range(struct drm_mm *mm,
> +void drm_mm_scan_init_with_range(struct drm_mm_scan *scan,
> + struct drm_mm *mm,
> u64 size,
> u64 alignment,
> unsigned long color,
> @@ -768,19 +777,25 @@ void drm_mm_init_scan_with_range(struct drm_mm *mm,
> {
> DRM_MM_BUG_ON(start >= end);
> DRM_MM_BUG_ON(!size || size > end - start);
> + DRM_MM_BUG_ON(mm->scan_active);
> +
> + scan->mm = mm;
> +
> + scan->color = color;
> + scan->alignment = alignment;
> + scan->size = size;
> +
> + DRM_MM_BUG_ON(end <= start);
> + scan->range_start = start;
> + scan->range_end = end;
> + scan->check_range = 1;
>
> - mm->scan_color = color;
> - mm->scan_alignment = alignment;
> - mm->scan_size = size;
> - mm->scanned_blocks = 0;
> - mm->scan_hit_start = 0;
> - mm->scan_hit_end = 0;
> - mm->scan_start = start;
> - mm->scan_end = end;
> - mm->scan_check_range = 1;
> - mm->prev_scanned_node = NULL;
> + scan->hit_start = U64_MAX;
> + scan->hit_end = 0;
> +
> + scan->prev_scanned_node = NULL;
> }
> -EXPORT_SYMBOL(drm_mm_init_scan_with_range);
> +EXPORT_SYMBOL(drm_mm_scan_init_with_range);
>
> /**
> * drm_mm_scan_add_block - add a node to the scan list
> @@ -792,46 +807,46 @@ EXPORT_SYMBOL(drm_mm_init_scan_with_range);
> * Returns:
> * True if a hole has been found, false otherwise.
> */
> -bool drm_mm_scan_add_block(struct drm_mm_node *node)
> +bool drm_mm_scan_add_block(struct drm_mm_scan *scan,
> + struct drm_mm_node *node)
> {
> - struct drm_mm *mm = node->mm;
> + struct drm_mm *mm = scan->mm;
> struct drm_mm_node *prev_node;
> u64 hole_start, hole_end;
> u64 adj_start, adj_end;
>
> - mm->scanned_blocks++;
> -
> + DRM_MM_BUG_ON(node->mm != mm);
> + DRM_MM_BUG_ON(!node->allocated);
> DRM_MM_BUG_ON(node->scanned_block);
> node->scanned_block = 1;
> + mm->scan_active++;
>
> - prev_node = list_entry(node->node_list.prev, struct drm_mm_node,
> - node_list);
> + prev_node = list_prev_entry(node, node_list);
>
> node->scanned_preceeds_hole = prev_node->hole_follows;
> prev_node->hole_follows = 1;
> list_del(&node->node_list);
> node->node_list.prev = &prev_node->node_list;
> - node->node_list.next = &mm->prev_scanned_node->node_list;
> - mm->prev_scanned_node = node;
> + node->node_list.next = &scan->prev_scanned_node->node_list;
> + scan->prev_scanned_node = node;
>
> adj_start = hole_start = drm_mm_hole_node_start(prev_node);
> adj_end = hole_end = drm_mm_hole_node_end(prev_node);
>
> - if (mm->scan_check_range) {
> - if (adj_start < mm->scan_start)
> - adj_start = mm->scan_start;
> - if (adj_end > mm->scan_end)
> - adj_end = mm->scan_end;
> + if (scan->check_range) {
> + if (adj_start < scan->range_start)
> + adj_start = scan->range_start;
> + if (adj_end > scan->range_end)
> + adj_end = scan->range_end;
> }
>
> if (mm->color_adjust)
> - mm->color_adjust(prev_node, mm->scan_color,
> - &adj_start, &adj_end);
> + mm->color_adjust(prev_node, scan->color, &adj_start, &adj_end);
>
> if (check_free_hole(adj_start, adj_end,
> - mm->scan_size, mm->scan_alignment)) {
> - mm->scan_hit_start = hole_start;
> - mm->scan_hit_end = hole_end;
> + scan->size, scan->alignment)) {
> + scan->hit_start = hole_start;
> + scan->hit_end = hole_end;
> return true;
> }
>
> @@ -856,24 +871,25 @@ EXPORT_SYMBOL(drm_mm_scan_add_block);
> * True if this block should be evicted, false otherwise. Will always
> * return false when no hole has been found.
> */
> -bool drm_mm_scan_remove_block(struct drm_mm_node *node)
> +bool drm_mm_scan_remove_block(struct drm_mm_scan *scan,
> + struct drm_mm_node *node)
> {
> - struct drm_mm *mm = node->mm;
> struct drm_mm_node *prev_node;
>
> - mm->scanned_blocks--;
> -
> + DRM_MM_BUG_ON(node->mm != scan->mm);
> DRM_MM_BUG_ON(!node->scanned_block);
> node->scanned_block = 0;
>
> - prev_node = list_entry(node->node_list.prev, struct drm_mm_node,
> - node_list);
> + DRM_MM_BUG_ON(!node->mm->scan_active);
> + node->mm->scan_active--;
> +
> + prev_node = list_prev_entry(node, node_list);
>
> prev_node->hole_follows = node->scanned_preceeds_hole;
> list_add(&node->node_list, &prev_node->node_list);
>
> - return (drm_mm_hole_node_end(node) > mm->scan_hit_start &&
> - node->start < mm->scan_hit_end);
> + return (drm_mm_hole_node_end(node) > scan->hit_start &&
> + node->start < scan->hit_end);
> }
> EXPORT_SYMBOL(drm_mm_scan_remove_block);
>
> @@ -890,7 +906,7 @@ void drm_mm_init(struct drm_mm *mm, u64 start, u64 size)
> DRM_MM_BUG_ON(start + size <= start);
>
> INIT_LIST_HEAD(&mm->hole_stack);
> - mm->scanned_blocks = 0;
> + mm->scan_active = 0;
>
> /* Clever trick to avoid a special case in the free hole tracking. */
> INIT_LIST_HEAD(&mm->head_node.node_list);
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
> index 169ac96e8f08..fe1e886dcabb 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
> @@ -113,6 +113,7 @@ static int etnaviv_iommu_find_iova(struct etnaviv_iommu *mmu,
>
> while (1) {
> struct etnaviv_vram_mapping *m, *n;
> + struct drm_mm_scan scan;
> struct list_head list;
> bool found;
>
> @@ -134,7 +135,7 @@ static int etnaviv_iommu_find_iova(struct etnaviv_iommu *mmu,
> }
>
> /* Try to retire some entries */
> - drm_mm_init_scan(&mmu->mm, size, 0, 0);
> + drm_mm_scan_init(&scan, &mmu->mm, size, 0, 0);
>
> found = 0;
> INIT_LIST_HEAD(&list);
> @@ -151,7 +152,7 @@ static int etnaviv_iommu_find_iova(struct etnaviv_iommu *mmu,
> continue;
>
> list_add(&free->scan_node, &list);
> - if (drm_mm_scan_add_block(&free->vram_node)) {
> + if (drm_mm_scan_add_block(&scan, &free->vram_node)) {
> found = true;
> break;
> }
> @@ -171,7 +172,7 @@ static int etnaviv_iommu_find_iova(struct etnaviv_iommu *mmu,
> * can leave the block pinned.
> */
> list_for_each_entry_safe(m, n, &list, scan_node)
> - if (!drm_mm_scan_remove_block(&m->vram_node))
> + if (!drm_mm_scan_remove_block(&scan, &m->vram_node))
> list_del_init(&m->scan_node);
>
> /*
> diff --git a/drivers/gpu/drm/i915/i915_gem_evict.c b/drivers/gpu/drm/i915/i915_gem_evict.c
> index 6457fd0c33a8..6db0d73c0aa7 100644
> --- a/drivers/gpu/drm/i915/i915_gem_evict.c
> +++ b/drivers/gpu/drm/i915/i915_gem_evict.c
> @@ -51,7 +51,10 @@ static bool ggtt_is_idle(struct drm_i915_private *dev_priv)
> }
>
> static bool
> -mark_free(struct i915_vma *vma, unsigned int flags, struct list_head *unwind)
> +mark_free(struct drm_mm_scan *scan,
> + struct i915_vma *vma,
> + unsigned int flags,
> + struct list_head *unwind)
> {
> if (i915_vma_is_pinned(vma))
> return false;
> @@ -63,7 +66,7 @@ mark_free(struct i915_vma *vma, unsigned int flags, struct list_head *unwind)
> return false;
>
> list_add(&vma->exec_list, unwind);
> - return drm_mm_scan_add_block(&vma->node);
> + return drm_mm_scan_add_block(scan, &vma->node);
> }
>
> /**
> @@ -97,6 +100,7 @@ i915_gem_evict_something(struct i915_address_space *vm,
> unsigned flags)
> {
> struct drm_i915_private *dev_priv = vm->i915;
> + struct drm_mm_scan scan;
> struct list_head eviction_list;
> struct list_head *phases[] = {
> &vm->inactive_list,
> @@ -123,11 +127,12 @@ i915_gem_evict_something(struct i915_address_space *vm,
> * object on the TAIL.
> */
> if (start != 0 || end != vm->total) {
> - drm_mm_init_scan_with_range(&vm->mm, min_size,
> + drm_mm_scan_init_with_range(&scan, &vm->mm, min_size,
> alignment, cache_level,
> start, end);
> } else
> - drm_mm_init_scan(&vm->mm, min_size, alignment, cache_level);
> + drm_mm_scan_init(&scan, &vm->mm, min_size,
> + alignment, cache_level);
>
> /* Retire before we search the active list. Although we have
> * reasonable accuracy in our retirement lists, we may have
> @@ -144,13 +149,13 @@ i915_gem_evict_something(struct i915_address_space *vm,
> phase = phases;
> do {
> list_for_each_entry(vma, *phase, vm_link)
> - if (mark_free(vma, flags, &eviction_list))
> + if (mark_free(&scan, vma, flags, &eviction_list))
> goto found;
> } while (*++phase);
>
> /* Nothing found, clean up and bail out! */
> list_for_each_entry_safe(vma, next, &eviction_list, exec_list) {
> - ret = drm_mm_scan_remove_block(&vma->node);
> + ret = drm_mm_scan_remove_block(&scan, &vma->node);
> BUG_ON(ret);
>
> INIT_LIST_HEAD(&vma->exec_list);
> @@ -199,7 +204,7 @@ i915_gem_evict_something(struct i915_address_space *vm,
> * of any of our objects, thus corrupting the list).
> */
> list_for_each_entry_safe(vma, next, &eviction_list, exec_list) {
> - if (drm_mm_scan_remove_block(&vma->node))
> + if (drm_mm_scan_remove_block(&scan, &vma->node))
> __i915_vma_pin(vma);
> else
> list_del_init(&vma->exec_list);
> diff --git a/drivers/gpu/drm/selftests/test-drm_mm.c b/drivers/gpu/drm/selftests/test-drm_mm.c
> index e2ed9efb361c..997f2bc93b9b 100644
> --- a/drivers/gpu/drm/selftests/test-drm_mm.c
> +++ b/drivers/gpu/drm/selftests/test-drm_mm.c
> @@ -1114,11 +1114,11 @@ static int igt_align64(void *ignored)
> return igt_align_pot(64);
> }
>
> -static void show_scan(const struct drm_mm *scan)
> +static void show_scan(const struct drm_mm_scan *scan)
> {
> pr_info("scan: hit [%llx, %llx], size=%lld, align=%lld, color=%ld\n",
> - scan->scan_hit_start, scan->scan_hit_end,
> - scan->scan_size, scan->scan_alignment, scan->scan_color);
> + scan->hit_start, scan->hit_end,
> + scan->size, scan->alignment, scan->color);
> }
>
> static void show_holes(const struct drm_mm *mm, int count)
> @@ -1158,7 +1158,7 @@ struct evict_node {
> struct list_head link;
> };
>
> -static bool evict_nodes(struct drm_mm *mm,
> +static bool evict_nodes(struct drm_mm_scan *scan,
> struct evict_node *nodes,
> unsigned int *order,
> unsigned int count,
> @@ -1170,18 +1170,16 @@ static bool evict_nodes(struct drm_mm *mm,
> for (i = 0; i < count; i++) {
> e = &nodes[order ? order[i] : i];
> list_add(&e->link, evict_list);
> - if (drm_mm_scan_add_block(&e->node))
> + if (drm_mm_scan_add_block(scan, &e->node))
> break;
> }
> list_for_each_entry_safe(e, en, evict_list, link) {
> - if (!drm_mm_scan_remove_block(&e->node))
> + if (!drm_mm_scan_remove_block(scan, &e->node))
> list_del(&e->link);
> }
> if (list_empty(evict_list)) {
> pr_err("Failed to find eviction: size=%lld [avail=%d], align=%lld (color=%lu)\n",
> - mm->scan_size, count,
> - mm->scan_alignment,
> - mm->scan_color);
> + scan->size, count, scan->alignment, scan->color);
> return false;
> }
>
> @@ -1195,19 +1193,20 @@ static bool evict_nothing(struct drm_mm *mm,
> unsigned int total_size,
> struct evict_node *nodes)
> {
> + struct drm_mm_scan scan;
> LIST_HEAD(evict_list);
> struct evict_node *e;
> struct drm_mm_node *node;
> unsigned int n;
>
> - drm_mm_init_scan(mm, 1, 0, 0);
> + drm_mm_scan_init(&scan, mm, 1, 0, 0);
> for (n = 0; n < total_size; n++) {
> e = &nodes[n];
> list_add(&e->link, &evict_list);
> - drm_mm_scan_add_block(&e->node);
> + drm_mm_scan_add_block(&scan, &e->node);
> }
> list_for_each_entry(e, &evict_list, link)
> - drm_mm_scan_remove_block(&e->node);
> + drm_mm_scan_remove_block(&scan, &e->node);
>
> for (n = 0; n < total_size; n++) {
> e = &nodes[n];
> @@ -1241,19 +1240,21 @@ static bool evict_everything(struct drm_mm *mm,
> unsigned int total_size,
> struct evict_node *nodes)
> {
> + struct drm_mm_scan scan;
> LIST_HEAD(evict_list);
> struct evict_node *e;
> unsigned int n;
> int err;
>
> - drm_mm_init_scan(mm, total_size, 0, 0);
> + drm_mm_scan_init(&scan, mm, total_size, 0, 0);
> for (n = 0; n < total_size; n++) {
> e = &nodes[n];
> list_add(&e->link, &evict_list);
> - drm_mm_scan_add_block(&e->node);
> + if (drm_mm_scan_add_block(&scan, &e->node))
> + break;
> }
> list_for_each_entry(e, &evict_list, link) {
> - if (!drm_mm_scan_remove_block(&e->node)) {
> + if (!drm_mm_scan_remove_block(&scan, &e->node)) {
> pr_err("Node %lld not marked for eviction!\n",
> e->node.start);
> list_del(&e->link);
> @@ -1287,15 +1288,16 @@ static int evict_something(struct drm_mm *mm,
> unsigned int alignment,
> const struct insert_mode *mode)
> {
> + struct drm_mm_scan scan;
> LIST_HEAD(evict_list);
> struct evict_node *e;
> struct drm_mm_node tmp;
> int err;
>
> - drm_mm_init_scan_with_range(mm,
> + drm_mm_scan_init_with_range(&scan, mm,
> size, alignment, 0,
> range_start, range_end);
> - if (!evict_nodes(mm,
> + if (!evict_nodes(&scan,
> nodes, order, count,
> &evict_list))
> return -EINVAL;
> @@ -1307,7 +1309,7 @@ static int evict_something(struct drm_mm *mm,
> if (err) {
> pr_err("Failed to insert into eviction hole: size=%d, align=%d\n",
> size, alignment);
> - show_scan(mm);
> + show_scan(&scan);
> show_holes(mm, 3);
> return err;
> }
> @@ -1864,15 +1866,16 @@ static int evict_color(struct drm_mm *mm,
> unsigned long color,
> const struct insert_mode *mode)
> {
> + struct drm_mm_scan scan;
> LIST_HEAD(evict_list);
> struct evict_node *e;
> struct drm_mm_node tmp;
> int err;
>
> - drm_mm_init_scan_with_range(mm,
> + drm_mm_scan_init_with_range(&scan, mm,
> size, alignment, color,
> range_start, range_end);
> - if (!evict_nodes(mm,
> + if (!evict_nodes(&scan,
> nodes, order, count,
> &evict_list))
> return -EINVAL;
> @@ -1884,7 +1887,7 @@ static int evict_color(struct drm_mm *mm,
> if (err) {
> pr_err("Failed to insert into eviction hole: size=%d, align=%d, color=%lu, err=%d\n",
> size, alignment, color, err);
> - show_scan(mm);
> + show_scan(&scan);
> show_holes(mm, 3);
> return err;
> }
> diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
> index 72e0c0ddf8d0..fcad718c5fb4 100644
> --- a/include/drm/drm_mm.h
> +++ b/include/drm/drm_mm.h
> @@ -98,20 +98,29 @@ struct drm_mm {
> /* Keep an interval_tree for fast lookup of drm_mm_nodes by address. */
> struct rb_root interval_tree;
>
> - unsigned int scan_check_range : 1;
> - unsigned int scanned_blocks;
> - unsigned long scan_color;
> - u64 scan_alignment;
> - u64 scan_size;
> - u64 scan_hit_start;
> - u64 scan_hit_end;
> - u64 scan_start;
> - u64 scan_end;
> - struct drm_mm_node *prev_scanned_node;
> -
> void (*color_adjust)(const struct drm_mm_node *node,
> unsigned long color,
> u64 *start, u64 *end);
> +
> + unsigned long scan_active;
> +};
> +
> +struct drm_mm_scan {
> + struct drm_mm *mm;
> +
> + u64 size;
> + u64 alignment;
> +
> + u64 range_start;
> + u64 range_end;
> +
> + u64 hit_start;
> + u64 hit_end;
> +
> + struct drm_mm_node *prev_scanned_node;
> +
> + unsigned long color;
> + bool check_range : 1;
> };
>
> /**
> @@ -378,18 +387,22 @@ __drm_mm_interval_first(const struct drm_mm *mm, u64 start, u64 last);
> node__ && node__->start < (end__); \
> node__ = list_next_entry(node__, node_list))
>
> -void drm_mm_init_scan(struct drm_mm *mm,
> +void drm_mm_scan_init(struct drm_mm_scan *scan,
> + struct drm_mm *mm,
> u64 size,
> u64 alignment,
> unsigned long color);
> -void drm_mm_init_scan_with_range(struct drm_mm *mm,
> +void drm_mm_scan_init_with_range(struct drm_mm_scan *scan,
> + struct drm_mm *mm,
> u64 size,
> u64 alignment,
> unsigned long color,
> u64 start,
> u64 end);
> -bool drm_mm_scan_add_block(struct drm_mm_node *node);
> -bool drm_mm_scan_remove_block(struct drm_mm_node *node);
> +bool drm_mm_scan_add_block(struct drm_mm_scan *scan,
> + struct drm_mm_node *node);
> +bool drm_mm_scan_remove_block(struct drm_mm_scan *scan,
> + struct drm_mm_node *node);
>
> void drm_mm_debug_table(const struct drm_mm *mm, const char *prefix);
> #ifdef CONFIG_DEBUG_FS
> --
> 2.11.0
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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