[PATCH 5.10 022/163] crypto: blake2s - add comment for blake2s_state fields

[Greg Kroah-Hartman]

From: Eric Biggers <ebiggers@xxxxxxxxxx>

commit 7d87131fadd53a0401b5c078dd64e58c3ea6994c upstream.

The first three fields of 'struct blake2s_state' are used in assembly
code, which isn't immediately obvious, so add a comment to this effect.

Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
Acked-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 include/crypto/blake2s.h |    1 +
 1 file changed, 1 insertion(+)

--- a/include/crypto/blake2s.h
+++ b/include/crypto/blake2s.h
@@ -24,6 +24,7 @@ enum blake2s_lengths {
 };
 
 struct blake2s_state {
+	/* 'h', 't', and 'f' are used in assembly code, so keep them as-is. */
 	u32 h[8];
 	u32 t[2];
 	u32 f[2];