D33798.diff
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	diff --git a/sys/compat/linuxkpi/common/include/linux/kernel.h b/sys/compat/linuxkpi/common/include/linux/kernel.h
	--- a/sys/compat/linuxkpi/common/include/linux/kernel.h
	+++ b/sys/compat/linuxkpi/common/include/linux/kernel.h
	@@ -649,6 +649,37 @@
	#define TAINT_WARN 0
	#define test_taint(x) (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);
	+}
	+
	/*
	* Checking if an option is defined would be easy if we could do CPP inside CPP.
	* The defined case whether -Dxxx or -Dxxx=1 are easy to deal with. In either