freebsd_amp_hwpstate/sys/miscfs/union
Bruce Evans f57e65478d Introduced a type `vop_t' for vnode operation functions and used
it 1138 times (:-() in casts and a few more times in declarations.
This change is null for the i386.

The type has to be `typedef int vop_t(void *)' and not `typedef
int vop_t()' because `gcc -Wstrict-prototypes' warns about the
latter.  Since vnode op functions are called with args of different
(struct pointer) types, neither of these function types is any use
for type checking of the arg, so it would be preferable not to use
the complete function type, especially since using the complete
type requires adding 1138 casts to avoid compiler warnings and
another 40+ casts to reverse the function pointer conversions before
calling the functions.
1995-11-09 08:17:23 +00:00
..
README BSD 4.4 Lite Kernel Sources 1994-05-24 10:09:53 +00:00
libc.opendir.c Added $Id$ 1994-08-02 07:55:43 +00:00
union.h Introduced a type `vop_t' for vnode operation functions and used 1995-11-09 08:17:23 +00:00
union_subr.c The `cred' and `proc' args were missing for some VOP_OPEN() and VOP_CLOSE() 1995-08-17 11:53:51 +00:00
union_vfsops.c Remove trailing whitespace. 1995-05-30 08:16:23 +00:00
union_vnops.c Introduced a type `vop_t' for vnode operation functions and used 1995-11-09 08:17:23 +00:00

README

If you plan on using union mounts, then you should consider replacing
"libc/gen/opendir.c" in the C library with the file "libc.opendir.c"
in this directory.  The replacement version of opendir() automatically
removes duplicate names when a union stack is encountered.  You will
then need to rebuild the C library and all commands.

@(#)README	8.1 (Berkeley) 2/15/94