[PATCH v1 1/5] lib: Import rol32 function from Linux

[Heiko Schocher <hs@nabladev.com>]

sm3 crypto algorithm uses rol32 function from linux, so
import it. Linux base is commit:
ca91b9500108:("Merge tag 'v6.15-rc4-ksmbd-server-fixes' of git://git.samba.org/ksmbd")

Signed-off-by: Heiko Schocher <hs@nabladev.com>
---

 include/linux/bitops.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index f826d7f3b34..29e0da48de8 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -148,6 +148,17 @@ static inline unsigned long hweight_long(unsigned long w)
 	return sizeof(w) == 4 ? generic_hweight32(w) : generic_hweight64(w);
 }
 
+/**
+ * rol32 - rotate a 32-bit value left
+ * @word: value to rotate
+ * @shift: bits to roll
+ */
+
+static inline __u32 rol32(__u32 word, unsigned int shift)
+{
+	return (word << (shift & 31)) | (word >> ((-shift) & 31));
+}
+
 #include <asm/bitops.h>
 
 /* linux/include/asm-generic/bitops/non-atomic.h */
-- 
2.20.1