diff options
author | 2016-04-11 10:41:07 +0300 | |
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committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/gpu/drm/drm_vma_manager.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/gpu/drm/drm_vma_manager.c')
-rw-r--r-- | kernel/drivers/gpu/drm/drm_vma_manager.c | 40 |
1 files changed, 12 insertions, 28 deletions
diff --git a/kernel/drivers/gpu/drm/drm_vma_manager.c b/kernel/drivers/gpu/drm/drm_vma_manager.c index 68c1f32fb..2f2ecde82 100644 --- a/kernel/drivers/gpu/drm/drm_vma_manager.c +++ b/kernel/drivers/gpu/drm/drm_vma_manager.c @@ -112,7 +112,7 @@ void drm_vma_offset_manager_destroy(struct drm_vma_offset_manager *mgr) EXPORT_SYMBOL(drm_vma_offset_manager_destroy); /** - * drm_vma_offset_lookup() - Find node in offset space + * drm_vma_offset_lookup_locked() - Find node in offset space * @mgr: Manager object * @start: Start address for object (page-based) * @pages: Size of object (page-based) @@ -122,37 +122,21 @@ EXPORT_SYMBOL(drm_vma_offset_manager_destroy); * region and the given node will be returned, as long as the node spans the * whole requested area (given the size in number of pages as @pages). * - * RETURNS: - * Returns NULL if no suitable node can be found. Otherwise, the best match - * is returned. It's the caller's responsibility to make sure the node doesn't - * get destroyed before the caller can access it. - */ -struct drm_vma_offset_node *drm_vma_offset_lookup(struct drm_vma_offset_manager *mgr, - unsigned long start, - unsigned long pages) -{ - struct drm_vma_offset_node *node; - - read_lock(&mgr->vm_lock); - node = drm_vma_offset_lookup_locked(mgr, start, pages); - read_unlock(&mgr->vm_lock); - - return node; -} -EXPORT_SYMBOL(drm_vma_offset_lookup); - -/** - * drm_vma_offset_lookup_locked() - Find node in offset space - * @mgr: Manager object - * @start: Start address for object (page-based) - * @pages: Size of object (page-based) + * Note that before lookup the vma offset manager lookup lock must be acquired + * with drm_vma_offset_lock_lookup(). See there for an example. This can then be + * used to implement weakly referenced lookups using kref_get_unless_zero(). * - * Same as drm_vma_offset_lookup() but requires the caller to lock offset lookup - * manually. See drm_vma_offset_lock_lookup() for an example. + * Example: + * drm_vma_offset_lock_lookup(mgr); + * node = drm_vma_offset_lookup_locked(mgr); + * if (node) + * kref_get_unless_zero(container_of(node, sth, entr)); + * drm_vma_offset_unlock_lookup(mgr); * * RETURNS: * Returns NULL if no suitable node can be found. Otherwise, the best match - * is returned. + * is returned. It's the caller's responsibility to make sure the node doesn't + * get destroyed before the caller can access it. */ struct drm_vma_offset_node *drm_vma_offset_lookup_locked(struct drm_vma_offset_manager *mgr, unsigned long start, |