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-rw-r--r--include/crypto/algapi.h20
1 files changed, 18 insertions, 2 deletions
diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index 404e9558e879..ebe4ded0c55d 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -191,9 +191,25 @@ static inline unsigned int crypto_queue_len(struct crypto_queue *queue)
return queue->qlen;
}
-/* These functions require the input/output to be aligned as u32. */
void crypto_inc(u8 *a, unsigned int size);
-void crypto_xor(u8 *dst, const u8 *src, unsigned int size);
+void __crypto_xor(u8 *dst, const u8 *src, unsigned int size);
+
+static inline void crypto_xor(u8 *dst, const u8 *src, unsigned int size)
+{
+ if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
+ __builtin_constant_p(size) &&
+ (size % sizeof(unsigned long)) == 0) {
+ unsigned long *d = (unsigned long *)dst;
+ unsigned long *s = (unsigned long *)src;
+
+ while (size > 0) {
+ *d++ ^= *s++;
+ size -= sizeof(unsigned long);
+ }
+ } else {
+ __crypto_xor(dst, src, size);
+ }
+}
int blkcipher_walk_done(struct blkcipher_desc *desc,
struct blkcipher_walk *walk, int err);