1274 				 struct raid5_percpu *percpu, int i)  in to_addr_conv()  argument
1278 	addr = flex_array_get(percpu->scribble, i);  in to_addr_conv()
1283 static struct page **to_addr_page(struct raid5_percpu *percpu, int i)  in to_addr_page()  argument
1287 	addr = flex_array_get(percpu->scribble, i);  in to_addr_page()
1292 ops_run_compute5(struct stripe_head *sh, struct raid5_percpu *percpu)  in ops_run_compute5()  argument
1295 	struct page **xor_srcs = to_addr_page(percpu, 0);  in ops_run_compute5()
1317 			  ops_complete_compute, sh, to_addr_conv(sh, percpu, 0));  in ops_run_compute5()
1368 ops_run_compute6_1(struct stripe_head *sh, struct raid5_percpu *percpu)  in ops_run_compute6_1()  argument
1371 	struct page **blocks = to_addr_page(percpu, 0);  in ops_run_compute6_1()
1405 				  to_addr_conv(sh, percpu, 0));  in ops_run_compute6_1()
1418 				  to_addr_conv(sh, percpu, 0));  in ops_run_compute6_1()
1426 ops_run_compute6_2(struct stripe_head *sh, struct raid5_percpu *percpu)  in ops_run_compute6_2()  argument
1437 	struct page **blocks = to_addr_page(percpu, 0);  in ops_run_compute6_2()
1480 					  to_addr_conv(sh, percpu, 0));  in ops_run_compute6_2()
1504 					  to_addr_conv(sh, percpu, 0));  in ops_run_compute6_2()
1511 					  to_addr_conv(sh, percpu, 0));  in ops_run_compute6_2()
1518 				  to_addr_conv(sh, percpu, 0));  in ops_run_compute6_2()
1542 ops_run_prexor5(struct stripe_head *sh, struct raid5_percpu *percpu,  in ops_run_prexor5()  argument
1546 	struct page **xor_srcs = to_addr_page(percpu, 0);  in ops_run_prexor5()
1565 			  ops_complete_prexor, sh, to_addr_conv(sh, percpu, 0));  in ops_run_prexor5()
1572 ops_run_prexor6(struct stripe_head *sh, struct raid5_percpu *percpu,  in ops_run_prexor6()  argument
1575 	struct page **blocks = to_addr_page(percpu, 0);  in ops_run_prexor6()
1585 			  ops_complete_prexor, sh, to_addr_conv(sh, percpu, 0));  in ops_run_prexor6()
1699 ops_run_reconstruct5(struct stripe_head *sh, struct raid5_percpu *percpu,  in ops_run_reconstruct5()  argument
1730 	xor_srcs = to_addr_page(percpu, j);  in ops_run_reconstruct5()
1765 				  to_addr_conv(sh, percpu, j));  in ops_run_reconstruct5()
1769 				  to_addr_conv(sh, percpu, j));  in ops_run_reconstruct5()
1785 ops_run_reconstruct6(struct stripe_head *sh, struct raid5_percpu *percpu,  in ops_run_reconstruct6()  argument
1813 	blocks = to_addr_page(percpu, j);  in ops_run_reconstruct6()
1831 				  head_sh, to_addr_conv(sh, percpu, j));  in ops_run_reconstruct6()
1834 				  to_addr_conv(sh, percpu, j));  in ops_run_reconstruct6()
1856 static void ops_run_check_p(struct stripe_head *sh, struct raid5_percpu *percpu)  in ops_run_check_p()  argument
1862 	struct page **xor_srcs = to_addr_page(percpu, 0);  in ops_run_check_p()
1882 			  to_addr_conv(sh, percpu, 0));  in ops_run_check_p()
1891 static void ops_run_check_pq(struct stripe_head *sh, struct raid5_percpu *percpu, int checkp)  in ops_run_check_pq()  argument
1893 	struct page **srcs = to_addr_page(percpu, 0);  in ops_run_check_pq()
1907 			  sh, to_addr_conv(sh, percpu, 0));  in ops_run_check_pq()
1909 			   &sh->ops.zero_sum_result, percpu->spare_page, &submit);  in ops_run_check_pq()
1918 	struct raid5_percpu *percpu;  in raid_run_ops()  local
1922 	percpu = per_cpu_ptr(conf->percpu, cpu);  in raid_run_ops()
1930 			tx = ops_run_compute5(sh, percpu);  in raid_run_ops()
1933 				tx = ops_run_compute6_1(sh, percpu);  in raid_run_ops()
1935 				tx = ops_run_compute6_2(sh, percpu);  in raid_run_ops()
1944 			tx = ops_run_prexor5(sh, percpu, tx);  in raid_run_ops()
1946 			tx = ops_run_prexor6(sh, percpu, tx);  in raid_run_ops()
1956 			ops_run_reconstruct5(sh, percpu, tx);  in raid_run_ops()
1958 			ops_run_reconstruct6(sh, percpu, tx);  in raid_run_ops()
1963 			ops_run_check_p(sh, percpu);  in raid_run_ops()
1965 			ops_run_check_pq(sh, percpu, 0);  in raid_run_ops()
1967 			ops_run_check_pq(sh, percpu, 1);  in raid_run_ops()
2094 		struct raid5_percpu *percpu;  in resize_chunks()  local
2097 		percpu = per_cpu_ptr(conf->percpu, cpu);  in resize_chunks()
2103 			flex_array_free(percpu->scribble);  in resize_chunks()
2104 			percpu->scribble = scribble;  in resize_chunks()
6265 static void free_scratch_buffer(struct r5conf *conf, struct raid5_percpu *percpu)  in free_scratch_buffer()  argument
6267 	safe_put_page(percpu->spare_page);  in free_scratch_buffer()
6268 	if (percpu->scribble)  in free_scratch_buffer()
6269 		flex_array_free(percpu->scribble);  in free_scratch_buffer()
6270 	percpu->spare_page = NULL;  in free_scratch_buffer()
6271 	percpu->scribble = NULL;  in free_scratch_buffer()
6274 static int alloc_scratch_buffer(struct r5conf *conf, struct raid5_percpu *percpu)  in alloc_scratch_buffer()  argument
6276 	if (conf->level == 6 && !percpu->spare_page)  in alloc_scratch_buffer()
6277 		percpu->spare_page = alloc_page(GFP_KERNEL);  in alloc_scratch_buffer()
6278 	if (!percpu->scribble)  in alloc_scratch_buffer()
6279 		percpu->scribble = scribble_alloc(max(conf->raid_disks,  in alloc_scratch_buffer()
6286 	if (!percpu->scribble || (conf->level == 6 && !percpu->spare_page)) {  in alloc_scratch_buffer()
6287 		free_scratch_buffer(conf, percpu);  in alloc_scratch_buffer()
6298 	if (!conf->percpu)  in raid5_free_percpu()
6307 		free_scratch_buffer(conf, per_cpu_ptr(conf->percpu, cpu));  in raid5_free_percpu()
6310 	free_percpu(conf->percpu);  in raid5_free_percpu()
6331 	struct raid5_percpu *percpu = per_cpu_ptr(conf->percpu, cpu);  in raid456_cpu_notify()  local
6336 		if (alloc_scratch_buffer(conf, percpu)) {  in raid456_cpu_notify()
6344 		free_scratch_buffer(conf, per_cpu_ptr(conf->percpu, cpu));  in raid456_cpu_notify()
6358 	conf->percpu = alloc_percpu(struct raid5_percpu);  in raid5_alloc_percpu()
6359 	if (!conf->percpu)  in raid5_alloc_percpu()
6372 		err = alloc_scratch_buffer(conf, per_cpu_ptr(conf->percpu, cpu));  in raid5_alloc_percpu()