CVS commit: [netbsd-10] src/sys/uvm

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Wed Dec 21 09:33:17 UTC 2022

Modified Files:
        src/sys/uvm [netbsd-10]: uvm_swap.c

Log Message:
Pull up following revision(s) (requested by chs in ticket #13):

        sys/uvm/uvm_swap.c: revision 1.207

swap: disallow user opens of swap block device

the swap/drum block device was never intended to allow user opens,
but when the internal VOP_OPEN() in uvm_swap_init() was added
back in rev 1.135, the d_open method was changed from always-fail
to always-succeed in order to allow the new initial internal open.
this had the side effect of incorrectly allowing user opens too.
fix this by replacing the swap_bdevsw d_open with one that succeeds
for the first call but fails for all subsequent calls.


To generate a diff of this commit:
cvs rdiff -u -r1.206 -r1.206.4.1 src/sys/uvm/uvm_swap.c

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