It is often overlooked that sign_extend32(), despite it's name, is safe
to use for 16 and 8 bit types aswell. This should help that sign extension
isn't done manually some other way.
Signed-off-by: Martin Kepplinger <martin.kepplin...@theobroma-systems.com>
---
include/linux/bitops.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index e635533..2177c01 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -164,6 +164,8 @@ static inline __u8 ror8(__u8 word, unsigned int shift)
* sign_extend32 - sign extend a 32-bit value using specified bit as sign-bit
* @value: value to sign extend
* @index: 0 based bit index (0<=index<32) to sign bit
+ *
+ * This is safe to use for 16- and 8-bit types aswell.
*/
static inline __s32 sign_extend32(__u32 value, int index)
{
--
2.1.4
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