drm/i915: Add __rcu annotation to cursor when iterating client objects

__rcu annotation is needed to avoid the sparse warnings such as:

  .../i915_drm_client.c:92:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
  .../i915_drm_client.c:92:9: sparse:    struct list_head [noderef] __rcu *
  .../i915_drm_client.c:92:9: sparse:    struct list_head *

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Fixes: 968853033d8a ("drm/i915: Implement fdinfo memory stats printing")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202311110610.h0m6ydI5-lkp@intel.com/
Cc: Andi Shyti <andi.shyti@linux.intel.com>
Cc: Aravind Iddamsetty <aravind.iddamsetty@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231113085457.199053-2-tvrtko.ursulin@linux.intel.com

diff --git a/drivers/gpu/drm/i915/i915_drm_client.c b/drivers/gpu/drm/i915/i915_drm_client.c
index be9acfd9410e72ad9368f50ed80f4a2d17764e16..fa6852713beedef2bdc40a3ec910d25b8375bbda 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drm_client.c
+++ b/drivers/gpu/drm/i915/i915_drm_client.c
@@ -78,7 +78,7 @@ static void show_meminfo(struct drm_printer *p, struct drm_file *file)
        struct drm_i915_private *i915 = fpriv->i915;
        struct drm_i915_gem_object *obj;
        struct intel_memory_region *mr;
-       struct list_head *pos;
+       struct list_head __rcu *pos;
        unsigned int id;
 
        /* Public objects. */