D56416.diff
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	diff --git a/lib/libsys/x86/pkru.3 b/lib/libsys/x86/pkru.3
	--- a/lib/libsys/x86/pkru.3
	+++ b/lib/libsys/x86/pkru.3
	@@ -71,13 +71,16 @@
	The default protection key index is zero, it is used even if no key
	was explicitly assigned to the address, or if the key was removed.
	.Pp
	-The protection prevents the system from accessing user addresses as well
	-as the user applications.
	-When a system call was unable to read or write user memory due to key
	-protection, it returns the
	-.Er EFAULT
	-error code.
	-Note that some side effects may have occurred if this error is reported.
	+If the user application attempts a memory access which is prohibited by the
	+PKRU register, the offending thread receives a synchronous
	+.Dv SIGSEGV
	+signal with
	+.Va si_code
	+set to
	+.Dv SEGV_PKUERR .
	+PKRU protections might prevent the kernel from accessing protected
	+user addresses when handling system calls, but this is not guaranteed and
	+must not be relied upon.
	.Pp
	Both 64-bit and 32-bit applications can use protection keys.
	More information about the hardware feature is provided in the IA32 Software