git: 98297ff3cfbb - main - LinuxKPI: move hex2bin() from kernel.h to new hex.h

The branch main has been updated by bz:

URL: https://cgit.FreeBSD.org/src/commit/?id=98297ff3cfbb42df86fa7af51a2740d5aa7236eb

commit 98297ff3cfbb42df86fa7af51a2740d5aa7236eb
Author:     Bjoern A. Zeeb <bz@FreeBSD.org>
AuthorDate: 2026-04-14 13:36:40 +0000
Commit:     Bjoern A. Zeeb <bz@FreeBSD.org>
CommitDate: 2026-04-18 01:12:12 +0000

    LinuxKPI: move hex2bin() from kernel.h to new hex.h
    
    New Linux v7.0 drivers include hex.h.  Rather than adding a dummy
    header, migrate the kernel.h hex2bin() into hex.h, where it belongs.
    Care needs to be taken as the _h2b() helper function is still used by
    other bits in kernel.h.
    
    Sponsored by:   The FreeBSD Foundation
    MFC after:      3 days
    Reviewed by:    emaste, dumbbell
    Differential Revision: https://reviews.freebsd.org/D56391
---
 sys/compat/linuxkpi/common/include/linux/hex.h    | 44 +++++++++++++++++++++++
 sys/compat/linuxkpi/common/include/linux/kernel.h | 32 +----------------
 2 files changed, 45 insertions(+), 31 deletions(-)

diff --git a/sys/compat/linuxkpi/common/include/linux/hex.h b/sys/compat/linuxkpi/common/include/linux/hex.h
new file mode 100644
index 000000000000..7e9f499cfb1b
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/hex.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2022-2026 Bjoern A. Zeeb
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#ifndef	_LINUXKPI_LINUX_HEX_H_
+#define	_LINUXKPI_LINUX_HEX_H_
+
+#include <linux/types.h>
+#include <linux/errno.h>
+
+static inline int
+_h2b(const char c)
+{
+
+	if (c >= '0' && c <= '9')
+		return (c - '0');
+	if (c >= 'a' && c <= 'f')
+		return (10 + c - 'a');
+	if (c >= 'A' && c <= 'F')
+		return (10 + c - 'A');
+	return (-EINVAL);
+}
+
+static inline int
+hex2bin(uint8_t *bindst, const char *hexsrc, size_t binlen)
+{
+	int hi4, lo4;
+
+	while (binlen > 0) {
+		hi4 = _h2b(*hexsrc++);
+		lo4 = _h2b(*hexsrc++);
+		if (hi4 < 0 || lo4 < 0)
+			return (-EINVAL);
+
+		*bindst++ = (hi4 << 4) | lo4;
+		binlen--;
+	}
+
+	return (0);
+}
+
+#endif	/* _LINUXKPI_LINUX_HEX_H_ */
diff --git a/sys/compat/linuxkpi/common/include/linux/kernel.h b/sys/compat/linuxkpi/common/include/linux/kernel.h
index 880d2f67c517..2430b25c6915 100644
--- a/sys/compat/linuxkpi/common/include/linux/kernel.h
+++ b/sys/compat/linuxkpi/common/include/linux/kernel.h
@@ -56,6 +56,7 @@
 #include <linux/log2.h>
 #include <linux/kconfig.h>
 #include <linux/instruction_pointer.h>
+#include <linux/hex.h>
 
 #include <asm/byteorder.h>
 #include <asm/cpufeature.h>
@@ -305,37 +306,6 @@ linux_ratelimited(linux_ratelimit_t *rl)
 #define	add_taint(x,y)	do {	\
 	} while (0)
 
-static inline int
-_h2b(const char c)
-{
-
-	if (c >= '0' && c <= '9')
-		return (c - '0');
-	if (c >= 'a' && c <= 'f')
-		return (10 + c - 'a');
-	if (c >= 'A' && c <= 'F')
-		return (10 + c - 'A');
-	return (-EINVAL);
-}
-
-static inline int
-hex2bin(uint8_t *bindst, const char *hexsrc, size_t binlen)
-{
-	int hi4, lo4;
-
-	while (binlen > 0) {
-		hi4 = _h2b(*hexsrc++);
-		lo4 = _h2b(*hexsrc++);
-		if (hi4 < 0 || lo4 < 0)
-			return (-EINVAL);
-
-		*bindst++ = (hi4 << 4) | lo4;
-		binlen--;
-	}
-
-	return (0);
-}
-
 static inline bool
 mac_pton(const char *macin, uint8_t *macout)
 {