1530 static struct page **to_addr_page(struct raid5_percpu *percpu, int i)  in to_addr_page()  argument
1532 	return percpu->scribble + i * percpu->scribble_obj_size;  in to_addr_page()
1537 				 struct raid5_percpu *percpu, int i)  in to_addr_conv()  argument
1539 	return (void *) (to_addr_page(percpu, i) + sh->disks + 2);  in to_addr_conv()
1546 to_addr_offs(struct stripe_head *sh, struct raid5_percpu *percpu)  in to_addr_offs()  argument
1548 	return (unsigned int *) (to_addr_conv(sh, percpu, 0) + sh->disks + 2);  in to_addr_offs()
1552 ops_run_compute5(struct stripe_head *sh, struct raid5_percpu *percpu)  in ops_run_compute5()  argument
1555 	struct page **xor_srcs = to_addr_page(percpu, 0);  in ops_run_compute5()
1556 	unsigned int *off_srcs = to_addr_offs(sh, percpu);  in ops_run_compute5()
1582 			  ops_complete_compute, sh, to_addr_conv(sh, percpu, 0));  in ops_run_compute5()
1649 ops_run_compute6_1(struct stripe_head *sh, struct raid5_percpu *percpu)  in ops_run_compute6_1()  argument
1652 	struct page **blocks = to_addr_page(percpu, 0);  in ops_run_compute6_1()
1653 	unsigned int *offs = to_addr_offs(sh, percpu);  in ops_run_compute6_1()
1689 				  to_addr_conv(sh, percpu, 0));  in ops_run_compute6_1()
1704 				  to_addr_conv(sh, percpu, 0));  in ops_run_compute6_1()
1713 ops_run_compute6_2(struct stripe_head *sh, struct raid5_percpu *percpu)  in ops_run_compute6_2()  argument
1724 	struct page **blocks = to_addr_page(percpu, 0);  in ops_run_compute6_2()
1725 	unsigned int *offs = to_addr_offs(sh, percpu);  in ops_run_compute6_2()
1771 					  to_addr_conv(sh, percpu, 0));  in ops_run_compute6_2()
1799 					  to_addr_conv(sh, percpu, 0));  in ops_run_compute6_2()
1807 					  to_addr_conv(sh, percpu, 0));  in ops_run_compute6_2()
1815 				  to_addr_conv(sh, percpu, 0));  in ops_run_compute6_2()
1848 ops_run_prexor5(struct stripe_head *sh, struct raid5_percpu *percpu,  in ops_run_prexor5()  argument
1852 	struct page **xor_srcs = to_addr_page(percpu, 0);  in ops_run_prexor5()
1853 	unsigned int *off_srcs = to_addr_offs(sh, percpu);  in ops_run_prexor5()
1882 			  ops_complete_prexor, sh, to_addr_conv(sh, percpu, 0));  in ops_run_prexor5()
1890 ops_run_prexor6(struct stripe_head *sh, struct raid5_percpu *percpu,  in ops_run_prexor6()  argument
1893 	struct page **blocks = to_addr_page(percpu, 0);  in ops_run_prexor6()
1894 	unsigned int *offs = to_addr_offs(sh, percpu);  in ops_run_prexor6()
1904 			  ops_complete_prexor, sh, to_addr_conv(sh, percpu, 0));  in ops_run_prexor6()
2031 ops_run_reconstruct5(struct stripe_head *sh, struct raid5_percpu *percpu,  in ops_run_reconstruct5()  argument
2064 	xor_srcs = to_addr_page(percpu, j);  in ops_run_reconstruct5()
2065 	off_srcs = to_addr_offs(sh, percpu);  in ops_run_reconstruct5()
2107 				  to_addr_conv(sh, percpu, j));  in ops_run_reconstruct5()
2111 				  to_addr_conv(sh, percpu, j));  in ops_run_reconstruct5()
2129 ops_run_reconstruct6(struct stripe_head *sh, struct raid5_percpu *percpu,  in ops_run_reconstruct6()  argument
2158 	blocks = to_addr_page(percpu, j);  in ops_run_reconstruct6()
2159 	offs = to_addr_offs(sh, percpu);  in ops_run_reconstruct6()
2177 				  head_sh, to_addr_conv(sh, percpu, j));  in ops_run_reconstruct6()
2180 				  to_addr_conv(sh, percpu, j));  in ops_run_reconstruct6()
2203 static void ops_run_check_p(struct stripe_head *sh, struct raid5_percpu *percpu)  in ops_run_check_p()  argument
2210 	struct page **xor_srcs = to_addr_page(percpu, 0);  in ops_run_check_p()
2211 	unsigned int *off_srcs = to_addr_offs(sh, percpu);  in ops_run_check_p()
2234 			  to_addr_conv(sh, percpu, 0));  in ops_run_check_p()
2244 static void ops_run_check_pq(struct stripe_head *sh, struct raid5_percpu *percpu, int checkp)  in ops_run_check_pq()  argument
2246 	struct page **srcs = to_addr_page(percpu, 0);  in ops_run_check_pq()
2247 	unsigned int *offs = to_addr_offs(sh, percpu);  in ops_run_check_pq()
2261 			  sh, to_addr_conv(sh, percpu, 0));  in ops_run_check_pq()
2264 			   &sh->ops.zero_sum_result, percpu->spare_page, 0, &submit);  in ops_run_check_pq()
2273 	struct raid5_percpu *percpu;  in raid_run_ops()  local
2275 	local_lock(&conf->percpu->lock);  in raid_run_ops()
2276 	percpu = this_cpu_ptr(conf->percpu);  in raid_run_ops()
2284 			tx = ops_run_compute5(sh, percpu);  in raid_run_ops()
2287 				tx = ops_run_compute6_1(sh, percpu);  in raid_run_ops()
2289 				tx = ops_run_compute6_2(sh, percpu);  in raid_run_ops()
2298 			tx = ops_run_prexor5(sh, percpu, tx);  in raid_run_ops()
2300 			tx = ops_run_prexor6(sh, percpu, tx);  in raid_run_ops()
2304 		tx = ops_run_partial_parity(sh, percpu, tx);  in raid_run_ops()
2313 			ops_run_reconstruct5(sh, percpu, tx);  in raid_run_ops()
2315 			ops_run_reconstruct6(sh, percpu, tx);  in raid_run_ops()
2320 			ops_run_check_p(sh, percpu);  in raid_run_ops()
2322 			ops_run_check_pq(sh, percpu, 0);  in raid_run_ops()
2324 			ops_run_check_pq(sh, percpu, 1);  in raid_run_ops()
2336 	local_unlock(&conf->percpu->lock);  in raid_run_ops()
2450 static int scribble_alloc(struct raid5_percpu *percpu,  in scribble_alloc()  argument
2468 	kvfree(percpu->scribble);  in scribble_alloc()
2470 	percpu->scribble = scribble;  in scribble_alloc()
2471 	percpu->scribble_obj_size = obj_size;  in scribble_alloc()
2489 		struct raid5_percpu *percpu;  in resize_chunks()  local
2491 		percpu = per_cpu_ptr(conf->percpu, cpu);  in resize_chunks()
2492 		err = scribble_alloc(percpu, new_disks,  in resize_chunks()
7324 static void free_scratch_buffer(struct r5conf *conf, struct raid5_percpu *percpu)  in free_scratch_buffer()  argument
7326 	safe_put_page(percpu->spare_page);  in free_scratch_buffer()
7327 	percpu->spare_page = NULL;  in free_scratch_buffer()
7328 	kvfree(percpu->scribble);  in free_scratch_buffer()
7329 	percpu->scribble = NULL;  in free_scratch_buffer()
7332 static int alloc_scratch_buffer(struct r5conf *conf, struct raid5_percpu *percpu)  in alloc_scratch_buffer()  argument
7334 	if (conf->level == 6 && !percpu->spare_page) {  in alloc_scratch_buffer()
7335 		percpu->spare_page = alloc_page(GFP_KERNEL);  in alloc_scratch_buffer()
7336 		if (!percpu->spare_page)  in alloc_scratch_buffer()
7340 	if (scribble_alloc(percpu,  in alloc_scratch_buffer()
7346 		free_scratch_buffer(conf, percpu);  in alloc_scratch_buffer()
7350 	local_lock_init(&percpu->lock);  in alloc_scratch_buffer()
7358 	free_scratch_buffer(conf, per_cpu_ptr(conf->percpu, cpu));  in raid456_cpu_dead()
7364 	if (!conf->percpu)  in raid5_free_percpu()
7368 	free_percpu(conf->percpu);  in raid5_free_percpu()
7397 	struct raid5_percpu *percpu = per_cpu_ptr(conf->percpu, cpu);  in raid456_cpu_up_prepare()  local
7399 	if (alloc_scratch_buffer(conf, percpu)) {  in raid456_cpu_up_prepare()
7411 	conf->percpu = alloc_percpu(struct raid5_percpu);  in raid5_alloc_percpu()
7412 	if (!conf->percpu)  in raid5_alloc_percpu()