Lines Matching full:generation

136 	 * @rng_info->generation must always be read here, as it serializes @state->key with the  in __cvdso_getrandom_data()
139 	current_generation = READ_ONCE(rng_info->generation);  in __cvdso_getrandom_data()
142 	 * If @state->generation doesn't match the kernel RNG's generation, then it means the  in __cvdso_getrandom_data()
145 	if (unlikely(state->generation != current_generation)) {  in __cvdso_getrandom_data()
147 		 * Write the generation before filling the key, in case of fork. If there is a fork  in __cvdso_getrandom_data()
151 		 * generation counter, so the fork would not be detected. Therefore, write  in __cvdso_getrandom_data()
152 		 * @state->generation before the call to the getrandom syscall.  in __cvdso_getrandom_data()
154 		WRITE_ONCE(state->generation, current_generation);  in __cvdso_getrandom_data()
158 		 * smp_store_release(&vdso_k_rng_data->generation) in random.c.  in __cvdso_getrandom_data()
166 			 * invalid, so invalidate the generation so that it is not used again, and  in __cvdso_getrandom_data()
169 			WRITE_ONCE(state->generation, 0);  in __cvdso_getrandom_data()
204 		/* Prevent the loop from being reordered wrt ->generation. */  in __cvdso_getrandom_data()
208 		 * Since @rng_info->generation will never be 0, re-read @state->generation, rather  in __cvdso_getrandom_data()
214 		if (unlikely(READ_ONCE(state->generation) != READ_ONCE(rng_info->generation))) {  in __cvdso_getrandom_data()