backports: add S8_MIN

This is needed by the iwlwifi river.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

diff --git a/backport/backport-include/linux/kernel.h b/backport/backport-include/linux/kernel.h
index 160689a318a260c4e6e26f4c9dd8309ce812fdb3..9d31d0f5438a3ab6456d734fcd276d1750ea409e 100644 (file)
--- a/backport/backport-include/linux/kernel.h
+++ b/backport/backport-include/linux/kernel.h
@@ -45,6 +45,18 @@
 #define SHRT_MIN       ((s16)(-SHRT_MAX - 1))
 #endif
 
+#ifndef U8_MAX
+#define U8_MAX         ((u8)~0U)
+#endif
+
+#ifndef S8_MAX
+#define S8_MAX         ((s8)(U8_MAX>>1))
+#endif
+
+#ifndef S8_MIN
+#define S8_MIN         ((s8)(-S8_MAX - 1))
+#endif
+
 #ifndef U16_MAX
 #define U16_MAX                ((u16)~0U)
 #endif