On 0207T1039, Konstantin Belousov wrote:
> On Mon, Feb 06, 2017 at 03:03:11PM -0800, John Baldwin wrote:
> > On Monday, February 06, 2017 08:57:12 PM Edward Tomasz Napierala wrote:
> > > Author: trasz
> > > Date: Mon Feb  6 20:57:12 2017
> > > New Revision: 313352
> > > URL: https://svnweb.freebsd.org/changeset/base/313352
> > > 
> > > Log:
> > >   Add kern_vm_mmap2(), kern_vm_mprotect(), kern_vm_msync(), 
> > > kern_vm_munlock(),
> > >   kern_vm_munmap(), and kern_vm_madvise(), and use them in various compats
> > >   instead of their sys_*() counterparts.
> > >   
> > >   Reviewed by:    ed, dchagin, kib
> > >   MFC after:      2 weeks
> > >   Sponsored by:   DARPA, AFRL
> > >   Differential Revision:  https://reviews.freebsd.org/D9378
> > 
> > I know kib@ suggested kern_vm_<foo> instead of the vm_<foo> you had 
> > suggested,
> > but just kern_<foo> would be more consistent.  That is what we have done 
> > with
> > every other system call.  (e.g. there isn't kern_socket_bind, 
> > kern_socket_listen,
> > etc., but just kern_bind() and kern_listen()).
> 
> Note that the kern_vm_* functions are not quite regular syscall helpers.
> The big issue with them, which caused my suggestion, is that the
> functions cannot be declared in sys/syscallsubr.h, because their
> declarations depend on the vm/*.h namespace.

Exactly; they use vm-specific types (vm_offset_t, for example).  And I
wanted to avoid changing the types all over the place, at least for now.

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