70 static inline __init unsigned long rotate_xor(unsigned long hash,  in rotate_xor()  argument
74 	const typeof(hash) *ptr = PTR_ALIGN(area, sizeof(hash));  in rotate_xor()
77 	if (size < diff + sizeof(hash))  in rotate_xor()
78 		return hash;  in rotate_xor()
80 	size = ALIGN_DOWN(size - diff, sizeof(hash));  in rotate_xor()
82 	for (i = 0; i < size / sizeof(hash); i++) {  in rotate_xor()
84 		hash = (hash << ((sizeof(hash) * 8) - 7)) | (hash >> 7);  in rotate_xor()
85 		hash ^= ptr[i];  in rotate_xor()
88 	return hash;  in rotate_xor()
93 	unsigned long hash = 0;  in get_random_boot()  local
97 	hash = rotate_xor(hash, linux_banner, strlen(linux_banner));  in get_random_boot()
100 	hash = rotate_xor(hash, &entropy, sizeof(entropy));  in get_random_boot()
102 	return hash;  in get_random_boot()