CVS commit: src/sys

[Chuck Silvers <chs%netbsd.org@localhost>]

Module Name:    src
Committed By:   chs
Date:           Wed Sep  1 16:56:20 UTC 2010

Modified Files:
        src/sys/miscfs/genfs: genfs_io.c genfs_node.h genfs_vnops.c
        src/sys/ufs/ufs: ufs_inode.c
        src/sys/uvm: uvm_pager.h

Log Message:
replace the earlier workaround for PR 40389 with a better fix.
the earlier change caused data corruption by freeing pages
without invaliding their mappings.  instead of the trylock/retry,
just take the genfs-node lock before calling VOP_GETPAGES()
and pass a new flag to tell it that we're already holding this lock.


To generate a diff of this commit:
cvs rdiff -u -r1.39 -r1.40 src/sys/miscfs/genfs/genfs_io.c
cvs rdiff -u -r1.19 -r1.20 src/sys/miscfs/genfs/genfs_node.h
cvs rdiff -u -r1.182 -r1.183 src/sys/miscfs/genfs/genfs_vnops.c
cvs rdiff -u -r1.82 -r1.83 src/sys/ufs/ufs/ufs_inode.c
cvs rdiff -u -r1.38 -r1.39 src/sys/uvm/uvm_pager.h

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