CVS commit: src/sys/kern

[David Young <dyoung%netbsd.org@localhost>]

Module Name:    src
Committed By:   dyoung
Date:           Wed Apr 29 01:03:43 UTC 2009

Modified Files:
        src/sys/kern: vfs_subr.c vfs_syscalls.c

Log Message:
Extract common code from vfs_rootmountalloc(9) and mount_domount() into
a new struct mount-allocation routine, vfs_mountalloc(9).  Documentation
updates will follow.

Attention: Synchronization Oversight Committee!  In mount_domount(),
I postpone the call mutex_enter(&mp->mnt_updating) until right before
the VFS_MOUNT(9) call because (1) that looks to me like the earliest
possible opportunity for mp to become visible to any other LWP, because
it was just kmem_zalloc(9)'d and (2) it made extracting the common code
much easier.  Tell me if my reasoning is faulty.


To generate a diff of this commit:
cvs rdiff -u -r1.375 -r1.376 src/sys/kern/vfs_subr.c
cvs rdiff -u -r1.392 -r1.393 src/sys/kern/vfs_syscalls.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.