41 static int hash_walk_next(struct crypto_hash_walk *walk)  in hash_walk_next()  argument
43 	unsigned int alignmask = walk->alignmask;  in hash_walk_next()
44 	unsigned int offset = walk->offset;  in hash_walk_next()
45 	unsigned int nbytes = min(walk->entrylen,  in hash_walk_next()
48 	walk->data = kmap_atomic(walk->pg);  in hash_walk_next()
49 	walk->data += offset;  in hash_walk_next()
58 	walk->entrylen -= nbytes;  in hash_walk_next()
62 static int hash_walk_new_entry(struct crypto_hash_walk *walk)  in hash_walk_new_entry()  argument
66 	sg = walk->sg;  in hash_walk_new_entry()
67 	walk->offset = sg->offset;  in hash_walk_new_entry()
68 	walk->pg = sg_page(walk->sg) + (walk->offset >> PAGE_SHIFT);  in hash_walk_new_entry()
69 	walk->offset = offset_in_page(walk->offset);  in hash_walk_new_entry()
70 	walk->entrylen = sg->length;  in hash_walk_new_entry()
72 	if (walk->entrylen > walk->total)  in hash_walk_new_entry()
73 		walk->entrylen = walk->total;  in hash_walk_new_entry()
74 	walk->total -= walk->entrylen;  in hash_walk_new_entry()
76 	return hash_walk_next(walk);  in hash_walk_new_entry()
79 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err)  in crypto_hash_walk_done()  argument
81 	unsigned int alignmask = walk->alignmask;  in crypto_hash_walk_done()
83 	walk->data -= walk->offset;  in crypto_hash_walk_done()
85 	if (walk->entrylen && (walk->offset & alignmask) && !err) {  in crypto_hash_walk_done()
88 		walk->offset = ALIGN(walk->offset, alignmask + 1);  in crypto_hash_walk_done()
89 		nbytes = min(walk->entrylen,  in crypto_hash_walk_done()
90 			     (unsigned int)(PAGE_SIZE - walk->offset));  in crypto_hash_walk_done()
92 			walk->entrylen -= nbytes;  in crypto_hash_walk_done()
93 			walk->data += walk->offset;  in crypto_hash_walk_done()
98 	kunmap_atomic(walk->data);  in crypto_hash_walk_done()
99 	crypto_yield(walk->flags);  in crypto_hash_walk_done()
104 	if (walk->entrylen) {  in crypto_hash_walk_done()
105 		walk->offset = 0;  in crypto_hash_walk_done()
106 		walk->pg++;  in crypto_hash_walk_done()
107 		return hash_walk_next(walk);  in crypto_hash_walk_done()
110 	if (!walk->total)  in crypto_hash_walk_done()
113 	walk->sg = sg_next(walk->sg);  in crypto_hash_walk_done()
115 	return hash_walk_new_entry(walk);  in crypto_hash_walk_done()
120 			   struct crypto_hash_walk *walk)  in crypto_hash_walk_first()  argument
122 	walk->total = req->nbytes;  in crypto_hash_walk_first()
124 	if (!walk->total) {  in crypto_hash_walk_first()
125 		walk->entrylen = 0;  in crypto_hash_walk_first()
129 	walk->alignmask = crypto_ahash_alignmask(crypto_ahash_reqtfm(req));  in crypto_hash_walk_first()
130 	walk->sg = req->src;  in crypto_hash_walk_first()
131 	walk->flags = req->base.flags;  in crypto_hash_walk_first()
133 	return hash_walk_new_entry(walk);  in crypto_hash_walk_first()