Module Name:	syssrc
Committed By:	chs
Date:		Thu Dec  6 04:29:24 UTC 2001

Modified Files:
	syssrc/sys/miscfs/genfs: layer_extern.h layer_vnops.c
	syssrc/sys/miscfs/nullfs: null_vnops.c
	syssrc/sys/miscfs/overlay: overlay_vnops.c
	syssrc/sys/miscfs/umapfs: umap_vnops.c
	syssrc/sys/miscfs/union: union_vnops.c

Log Message:
add VOP_GETPAGES and VOP_PUTPAGES methods for layered filesystems.
drop the interlock on the upper layer, acquire the interlock on the
lower layer.


To generate a diff of this commit:
cvs rdiff -r1.4 -r1.5 syssrc/sys/miscfs/genfs/layer_extern.h
cvs rdiff -r1.9 -r1.10 syssrc/sys/miscfs/genfs/layer_vnops.c
cvs rdiff -r1.23 -r1.24 syssrc/sys/miscfs/nullfs/null_vnops.c
cvs rdiff -r1.7 -r1.8 syssrc/sys/miscfs/overlay/overlay_vnops.c
cvs rdiff -r1.20 -r1.21 syssrc/sys/miscfs/umapfs/umap_vnops.c
cvs rdiff -r1.57 -r1.58 syssrc/sys/miscfs/union/union_vnops.c

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