[SCM] Hurd branch, master, updated. v0.7-101-g5eef605

[Justus Winter]

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- Log -----------------------------------------------------------------
commit 5eef605eb523e4148ccd22578327492178cfd0c4
Author: Flavio Cruz <address@hidden>
Date:   Tue Mar 15 04:50:02 2016 -0400

    netfs: Remove global reference count lock.
    
    * libnetfs/drop-node.c: Remove use of netfs_node_refcnt_lock.
    * libnetfs/init-init.c: Remove netfs_node_refcnt_lock.
    * libnetfs/make-node.c: Initialize refcounts in refcounts_init.
    * libnetfs/netfs.h: Use refcounts_t for tracking node references. Remove
    netfs_node_refcnt_lock. Add netfs_nref_light, netfs_nrele_light and
    handler netfs_try_dropping_softrefs. Adjust comments.
    * libnetfs/nput.c: Use refcounts_t. Call netfs_try_dropping_softrefs to
    remove any soft reference that the translator might have acquired
    during the lifetime of the node. Implement empty
    netfs_try_dropping_softrefs.
    * libnetfs/nref.c: Implement netfs_nref_light.
    * libnetfs/nrele.c: Use refcounts_t and netfs_try_dropping_softrefs.
    Implement netfs_nrele_light.
    * ftpfs/dir.c: Use netfs_nref without locking the old
    netfs_node_refcnt_lock.
    * ftpfs/node.c: Likewise.
    * usermux/mux.c: Use netfs_nref to increase hard references of the node.
    * hostmux/mux.c: Use netfs_nref to increase hard references of the node.
    * trans/fakeroot.c (new_node): Use a light reference when storing a node in 
the
    hash table.
    * trans/fakeroot.c (netfs_try_dropping_softrefs): Implement
    netfs_try_dropping_softrefs to remove the node from the hash table.
    * trans/fakeroot.c (netfs_node_norefs): Remove code to remove the node
    from the hash table.
    * trans/fakeroot.c (netfs_S_dir_lookup): Simplify lookup code since we
    don't need to lock netfs_node_refcnt_lock anymore.
    * procfs/netfs.c: Remove use of netfs_node_refcnt_lock.
    * nfs/cache.c: Add mutex to handle exclusive access to nodehash. This
    replaces the use of netfs_node_refcnt_lock.
    * nfs/cache.c (lookup_handle): Use nodehash_ihash_lock when accessing
    nodehash. Use netfs_nref_light to add one soft reference to the node
    just added to nodehash.
    * nfs/cache.c (netfs_node_norefs): Use netfs_nref. Don't use
    netfs_node_refcnt_lock and don't remove the node from nodehash here.
    * nfs/cache.c (netfs_try_dropping_softrefs): Drop the light reference
    when the node has no more hard references.
    * nfs/cache.c (recache_handle): Use nodehash_ihash_lock instead.
    * nfs/ops.c (netds_attempt_unlink): Use refcounts_references.
    * console/console.c (netfs_node_norefs): Use a soft reference to store
    a node in dir_node, cons_node, disp_node, inp_node.
    * console/console.c (netfs_try_dropping_softrefs): When dropping all
    soft references remove node pointer from the fields above.

-----------------------------------------------------------------------

Summary of changes:
 console/console.c    |   64 +++++++++++++++++++++++++++++---------------------
 ftpfs/dir.c          |   27 ++++----------------
 ftpfs/node.c         |    8 +-----
 hostmux/mux.c        |    6 +---
 libnetfs/drop-node.c |    1 -
 libnetfs/init-init.c |    2 -
 libnetfs/make-node.c |    2 +-
 libnetfs/netfs.h     |   42 +++++++++++++++++++++-----------
 libnetfs/nput.c      |   27 ++++++++++++++-------
 libnetfs/nref.c      |   10 +++++--
 libnetfs/nrele.c     |   37 +++++++++++++++++++++++-----
 nfs/cache.c          |   40 ++++++++++++++++++-------------
 nfs/ops.c            |    5 +++-
 procfs/netfs.c       |    4 ---
 trans/fakeroot.c     |   45 +++++++++++++++++++++--------------
 usermux/mux.c        |    6 +---
 16 files changed, 185 insertions(+), 141 deletions(-)


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