[PATCH 2/3] move limits for sNN/uNN types from kernel.h to limits.h

[Rasmus Villemoes]

Since we define the {s,u}{8,16,32,64} types the same way on all
architectures, i.e. everybody uses asm-generic/int-ll64.h, we can just
define the associated limit macros in terms of those for the
corresponding types. This eliminates another set of limit macros that
are not usable in #if conditionals.

These type names and macros are not C or POSIX, so there's no language
violation, but certainly a violation of developers' reasonable
expectations.

Signed-off-by: Rasmus Villemoes <ravi at prevas.dk>
---
 include/limits.h       | 13 +++++++++++++
 include/linux/kernel.h | 13 -------------
 2 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/include/limits.h b/include/limits.h
index ec111023e00..aa30f5dc8d8 100644
--- a/include/limits.h
+++ b/include/limits.h
@@ -31,6 +31,19 @@
 #define LLONG_MIN   (-LONG_LONG_MAX - 1LL)
 #define ULLONG_MAX  (LLONG_MAX * 2ULL + 1ULL)
 
+#define U8_MAX      UCHAR_MAX
+#define S8_MAX      SCHAR_MAX
+#define S8_MIN      SCHAR_MIN
+#define U16_MAX     USHRT_MAX
+#define S16_MAX     SHRT_MAX
+#define S16_MIN     SHRT_MIN
+#define U32_MAX     UINT_MAX
+#define S32_MAX     INT_MAX
+#define S32_MIN     INT_MIN
+#define U64_MAX     ULLONG_MAX
+#define S64_MAX     LLONG_MAX
+#define S64_MIN     LLONG_MIN
+
 #define CHAR_BIT    8
 #define UINT32_MAX  0xffffffffU
 #define UINT64_MAX  0xffffffffffffffffULL
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index f26274fbe1d..d3d979834ae 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -5,19 +5,6 @@
 #include <linux/printk.h> /* for printf/pr_* utilities */
 #include <limits.h>
 
-#define U8_MAX		((u8)~0U)
-#define S8_MAX		((s8)(U8_MAX>>1))
-#define S8_MIN		((s8)(-S8_MAX - 1))
-#define U16_MAX		((u16)~0U)
-#define S16_MAX		((s16)(U16_MAX>>1))
-#define S16_MIN		((s16)(-S16_MAX - 1))
-#define U32_MAX		((u32)~0U)
-#define S32_MAX		((s32)(U32_MAX>>1))
-#define S32_MIN		((s32)(-S32_MAX - 1))
-#define U64_MAX		((u64)~0ULL)
-#define S64_MAX		((s64)(U64_MAX>>1))
-#define S64_MIN		((s64)(-S64_MAX - 1))
-
 #define INT32_MAX	S32_MAX
 
 #define STACK_MAGIC	0xdeadbeef
-- 
2.50.0