Index: share/man/man9/style.9 =================================================================== --- share/man/man9/style.9 +++ share/man/man9/style.9 @@ -26,7 +26,7 @@ .\" From: @(#)style 1.14 (Berkeley) 4/28/95 .\" $FreeBSD$ .\" -.Dd December 5, 2015 +.Dd September 20, 2016 .Dt STYLE 9 .Os .Sh NAME @@ -114,18 +114,24 @@ __FBSDID("$FreeBSD$"); .Ed .Pp -Leave another blank line before the header files. +Leave one blank line before the header files. .Pp -Kernel include files (i.e.\& +Kernel include files (i.e.,\& .Pa sys/*.h ) -come first sorted alphabetically where possible. -Include -.In sys/types.h -OR -.In sys/param.h , -but not both and include it first. +come first. +Kernel headers should be sorted alphabetically where possible. +An exception is that one of .In sys/types.h +or +.In sys/param.h +is usually needed before any others. +.In sys/param.h includes +.In sys/types.h . +Do not include both. +Many headers, including +.In sys/types.h , +include .In sys/cdefs.h , and it is okay to depend on that. .Bd -literal @@ -144,7 +150,7 @@ #include .Ed .Pp -Do not use files in +Do not include files in .Pa /usr/include for files in the kernel. .Pp @@ -166,7 +172,7 @@ #include .Ed .Pp -Leave another blank line before the user include files. +Leave another blank line before the local include files. .Bd -literal #include "pathnames.h" /* Local includes in double quotes. */ .Ed