72 	struct vgetrandom_state *state = opaque_state;  in __cvdso_getrandom_data()  local
81 		params->size_of_opaque_state = sizeof(*state);  in __cvdso_getrandom_data()
90 	if (unlikely(((unsigned long)opaque_state & ~PAGE_MASK) + sizeof(*state) > PAGE_SIZE))  in __cvdso_getrandom_data()
98 	if (unlikely(opaque_len != sizeof(*state)))  in __cvdso_getrandom_data()
125 	in_use = READ_ONCE(state->in_use);  in __cvdso_getrandom_data()
129 	WRITE_ONCE(state->in_use, true);  in __cvdso_getrandom_data()
142 	if (unlikely(state->generation != current_generation)) {  in __cvdso_getrandom_data()
151 		WRITE_ONCE(state->generation, current_generation);  in __cvdso_getrandom_data()
160 		if (getrandom_syscall(state->key, sizeof(state->key), 0) != sizeof(state->key)) {  in __cvdso_getrandom_data()
166 			WRITE_ONCE(state->generation, 0);  in __cvdso_getrandom_data()
172 			WRITE_ONCE(state->in_use, false);  in __cvdso_getrandom_data()
181 		state->pos = sizeof(state->batch);  in __cvdso_getrandom_data()
191 	batch_len = min_t(size_t, sizeof(state->batch) - state->pos, len);  in __cvdso_getrandom_data()
194 		memcpy_and_zero_src(buffer, state->batch + state->pos, batch_len);  in __cvdso_getrandom_data()
195 		state->pos += batch_len;  in __cvdso_getrandom_data()
211 		if (unlikely(READ_ONCE(state->generation) != READ_ONCE(rng_info->generation))) {  in __cvdso_getrandom_data()
217 				WRITE_ONCE(state->in_use, false);  in __cvdso_getrandom_data()
230 		WRITE_ONCE(state->in_use, false);  in __cvdso_getrandom_data()
237 		__arch_chacha20_blocks_nostack(buffer, state->key, counter, nblocks);  in __cvdso_getrandom_data()
242 	BUILD_BUG_ON(sizeof(state->batch_key) % CHACHA_BLOCK_SIZE != 0);  in __cvdso_getrandom_data()
245 	__arch_chacha20_blocks_nostack(state->batch_key, state->key, counter,  in __cvdso_getrandom_data()
246 				       sizeof(state->batch_key) / CHACHA_BLOCK_SIZE);  in __cvdso_getrandom_data()
249 	state->pos = 0;  in __cvdso_getrandom_data()