lib: crc32: Add some additional __pure annotations
In case they help the compiler.
Signed-off-by: George Spelvin <linux@horizon.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/crc32.h b/include/linux/crc32.h
index edf34e8..9e8a032 100644
--- a/include/linux/crc32.h
+++ b/include/linux/crc32.h
@@ -8,8 +8,8 @@
#include <linux/types.h>
#include <linux/bitrev.h>
-extern u32 crc32_le(u32 crc, unsigned char const *p, size_t len);
-extern u32 crc32_be(u32 crc, unsigned char const *p, size_t len);
+u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len);
+u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len);
/**
* crc32_le_combine - Combine two crc32 check values into one. For two
@@ -36,7 +36,7 @@
return crc32_le_shift(crc1, len2) ^ crc2;
}
-extern u32 __crc32c_le(u32 crc, unsigned char const *p, size_t len);
+u32 __pure __crc32c_le(u32 crc, unsigned char const *p, size_t len);
/**
* __crc32c_le_combine - Combine two crc32c check values into one. For two
diff --git a/lib/crc32.c b/lib/crc32.c
index af938ab..9a907d4 100644
--- a/lib/crc32.c
+++ b/lib/crc32.c
@@ -53,7 +53,7 @@
#if CRC_LE_BITS > 8 || CRC_BE_BITS > 8
/* implements slicing-by-4 or slicing-by-8 algorithm */
-static inline u32
+static inline u32 __pure
crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256])
{
# ifdef __LITTLE_ENDIAN