FreeBSD/src faa9679 (r316289)sys/compat/linux linux_misc.c

Use kern_mincore() helper instead of abusing syscall entry.

Suggested by:   kib@
Reviewed by:    kib@
MFC after:      1 month
Differential Revision:  https://reviews.freebsd.org/D10143
DeltaFile
+1-5sys/compat/linux/linux_misc.c
+1-51 files

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