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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445// SPDX-License-Identifier: GPL-2.0#include <linux/bitops.h>#include <linux/export.h>#include <linux/kernel.h>#include <linux/random.h>#include <linux/slab.h>#include <linux/types.h>
#include "gpu_random.h"
u32 gpu_prandom_u32_max_state(u32 ep_ro, struct rnd_state *state){ return upper_32_bits((u64)prandom_u32_state(state) * ep_ro);}EXPORT_SYMBOL(gpu_prandom_u32_max_state);
void gpu_random_reorder(unsigned int *order, unsigned int count, struct rnd_state *state){ unsigned int i, j;
for (i = 0; i < count; ++i) { BUILD_BUG_ON(sizeof(unsigned int) > sizeof(u32)); j = gpu_prandom_u32_max_state(count, state); swap(order[i], order[j]); }}EXPORT_SYMBOL(gpu_random_reorder);
unsigned int *gpu_random_order(unsigned int count, struct rnd_state *state){ unsigned int *order, i;
order = kmalloc_array(count, sizeof(*order), GFP_KERNEL); if (!order) return order;
for (i = 0; i < count; i++) order[i] = i;
gpu_random_reorder(order, count, state); return order;}EXPORT_SYMBOL(gpu_random_order);