diff options
Diffstat (limited to 'drivers/gpu/drm/lib/drm_random.h')
| -rw-r--r-- | drivers/gpu/drm/lib/drm_random.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/gpu/drm/lib/drm_random.h b/drivers/gpu/drm/lib/drm_random.h new file mode 100644 index 000000000..4a3e94dfa --- /dev/null +++ b/drivers/gpu/drm/lib/drm_random.h @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __DRM_RANDOM_H__ +#define __DRM_RANDOM_H__ + +/* This is a temporary home for a couple of utility functions that should + * be transposed to lib/ at the earliest convenience. + */ + +#include <linux/random.h> + +#define DRM_RND_STATE_INITIALIZER(seed__) ({ \ + struct rnd_state state__; \ + prandom_seed_state(&state__, (seed__)); \ + state__; \ +}) + +#define DRM_RND_STATE(name__, seed__) \ + struct rnd_state name__ = DRM_RND_STATE_INITIALIZER(seed__) + +unsigned int *drm_random_order(unsigned int count, + struct rnd_state *state); +void drm_random_reorder(unsigned int *order, + unsigned int count, + struct rnd_state *state); + +#endif /* !__DRM_RANDOM_H__ */ |