[v2,07/25] crypto: ansi_cprng - Shrink context some more

Commit Message

George Spelvin Dec. 7, 2014, 12:26 p.m. UTC

ctx->flags only has 2 bits assigned, so there's no need for a
32-bit field.  Likewise, rand_data_valid is at most 16.

A typical x86 spinlock_t is 16 bits, so they fit very nicely
right next to it, shrinking the 64-bit context structure to
64 bytes.

Signed-off-by: George Spelvin <[e-mail]>
---
 crypto/ansi_cprng.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

diff --git a/crypto/ansi_cprng.c b/crypto/ansi_cprng.c
index 730e0857..022662d7 100644
--- a/crypto/ansi_cprng.c
+++ b/crypto/ansi_cprng.c
@@ -43,12 +43,12 @@ 
  */
 struct prng_context {
 	spinlock_t prng_lock;
+	u8 flags;
+	u8 rand_data_valid;
 	unsigned char rand_data[DEFAULT_BLK_SZ];
 	unsigned char DT[DEFAULT_BLK_SZ];
 	unsigned char V[DEFAULT_BLK_SZ];
-	u32 rand_data_valid;
 	struct crypto_cipher *tfm;
-	u32 flags;
 };
 
 static int dbg;