Move uio enums to sys/_uio.h.

Include _uio.h instead of uio.h in several headers to reduce header
polution.

Fix a few places that relied on header polution to get the uio.h header.

I have not moved struct uio as many more things that use it rely on
header polution to get other definitions from uio.h.

Reviewed by:	cem, kib, markj
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D14811

1 files changed, 4 insertions, 3 deletions

diff --git a/sys/sys/syscallsubr.h b/sys/sys/syscallsubr.h
index d03595286694..33e16c1f7f0c 100644
--- a/sys/sys/syscallsubr.h
+++ b/sys/sys/syscallsubr.h
@@ -31,13 +31,14 @@
 #define _SYS_SYSCALLSUBR_H_
 
 #include <sys/signal.h>
-#include <sys/uio.h>
 #include <sys/socket.h>
 #include <sys/mac.h>
 #include <sys/mount.h>
 #include <sys/_cpuset.h>
 #include <sys/_domainset.h>
+#include <sys/_uio.h>
 
+struct __wrusage;
 struct file;
 struct filecaps;
 enum idtype;
@@ -55,12 +56,12 @@ struct pollfd;
 struct ogetdirentries_args;
 struct rlimit;
 struct rusage;
+struct sched_param;
 union semun;
 struct sockaddr;
 struct stat;
 struct thr_param;
-struct sched_param;
-struct __wrusage;
+struct uio;
 
 int	kern___getcwd(struct thread *td, char *buf, enum uio_seg bufseg,
 	    size_t buflen, size_t path_max);