LinuxKPI: Move [SU](8|16|32|64)_(MAX|MIN) defines to linux/limits.h

Some source files get them from linux/limits.h directly rather than from
linux/kernel.h.
While here replace Linux constant values with sys/stdint.h provided ones.

Sponsored by:	Serenity Cyber Security, LLC
Reviewed by:	emaste
MFC after:	1 week

3 files changed, 48 insertions, 13 deletions

diff --git a/sys/compat/linuxkpi/common/include/linux/kernel.h b/sys/compat/linuxkpi/common/include/linux/kernel.h
index 99ba19e9e25c..96259716d3a7 100644
--- a/sys/compat/linuxkpi/common/include/linux/kernel.h
+++ b/sys/compat/linuxkpi/common/include/linux/kernel.h
@@ -44,6 +44,7 @@
 #include <linux/build_bug.h>
 #include <linux/compiler.h>
 #include <linux/container_of.h>
+#include <linux/limits.h>
 #include <linux/stringify.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
@@ -70,19 +71,6 @@
 #define	KERN_INFO	"<6>"
 #define	KERN_DEBUG	"<7>"
 
-#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	S8_C(x)  x
 #define	U8_C(x)  x ## U
 #define	S16_C(x) x
diff --git a/sys/compat/linuxkpi/common/include/linux/limits.h b/sys/compat/linuxkpi/common/include/linux/limits.h
new file mode 100644
index 000000000000..716366033bb3
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/limits.h
@@ -0,0 +1,47 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2023 Serenity Cyber Security, LLC.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _LINUXKPI_LINUX_LIMITS_H
+#define	_LINUXKPI_LINUX_LIMITS_H
+
+#include <sys/types.h>
+#include <sys/stdint.h>
+
+#define	U8_MAX		UINT8_MAX
+#define	S8_MAX		INT8_MAX
+#define	S8_MIN		INT8_MIN
+#define	U16_MAX		UINT16_MAX
+#define	S16_MAX		INT16_MAX
+#define	S16_MIN		INT16_MIN
+#define	U32_MAX		UINT32_MAX
+#define	S32_MAX		INT32_MAX
+#define	S32_MIN		INT32_MIN
+#define	U64_MAX		UINT64_MAX
+#define	S64_MAX		INT64_MAX
+#define	S64_MIN		INT64_MIN
+
+#endif
diff --git a/sys/compat/linuxkpi/dummy/include/linux/limits.h b/sys/compat/linuxkpi/dummy/include/linux/limits.h
deleted file mode 100644
index e69de29bb2d1..000000000000
--- a/sys/compat/linuxkpi/dummy/include/linux/limits.h
+++ /dev/null