[patch V4 12/31] lib: bch: use parity32

[zengzhaoxiu]

From: Zhaoxiu Zeng <zhaoxiu.z...@gmail.com>

Signed-off-by: Zhaoxiu Zeng <zhaoxiu.z...@gmail.com>
---
 lib/bch.c | 14 +-------------
 1 file changed, 1 insertion(+), 13 deletions(-)

diff --git a/lib/bch.c b/lib/bch.c
index bc89dfe4..6c6e8d4 100644
--- a/lib/bch.c
+++ b/lib/bch.c
@@ -278,18 +278,6 @@ static inline int deg(unsigned int poly)
        return fls(poly)-1;
 }
 
-static inline int parity(unsigned int x)
-{
-       /*
-        * public domain code snippet, lifted from
-        * http://www-graphics.stanford.edu/~seander/bithacks.html
-        */
-       x ^= x >> 1;
-       x ^= x >> 2;
-       x = (x & 0x11111111U) * 0x11111111U;
-       return (x >> 28) & 1;
-}
-
 /* Galois field basic operations: multiply, divide, inverse, etc. */
 
 static inline unsigned int gf_mul(struct bch_control *bch, unsigned int a,
@@ -494,7 +482,7 @@ static int solve_linear_system(struct bch_control *bch, 
unsigned int *rows,
                tmp = 0;
                for (r = m-1; r >= 0; r--) {
                        mask = rows[r] & (tmp|1);
-                       tmp |= parity(mask) << (m-r);
+                       tmp |= parity32(mask) << (m-r);
                }
                sol[p] = tmp >> 1;
        }
-- 
2.7.4