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    SubjectRe: Important for fs devs: rcu-walk merged upstream
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    On Tue, 11 Jan 2011, Nick Piggin wrote:
    > On Saturday, 8 January 2011, Marco Stornelli <marco.stornelli@gmail.com> wrote:
    > > Il 08/01/2011 03:54, Nick Piggin ha scritto:
    > >> The vfs-scale branch is now upstream. If you haven't
    > >> looked yet, your filesystem is likely to have been
    > >> touched, so check it out.
    > >>
    > >> Also look at Documentation/filesystems/porting and
    > >> path-lookup.txt.
    > >
    > > Nick, in the porting file I read:
    > >
    > > ..........hazards on dentries and inodes (see
    > > Documentation/filesystems/path-walk.txt). ..........
    > >  ^^^^^^^^^^^^^
    > >
    > > Should it be "path-lookup.txt"?
    > >
    > > Marco
    > >
    >
    > Hi, yes thanks I'll fix it

    Also you use IPERM_RCU instead of IPERM_FLAG_RCU in the documentation.

    Thanks,
    Miklos


    diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
    index 07a32b4..c2819ee 100644
    --- a/Documentation/filesystems/porting
    +++ b/Documentation/filesystems/porting
    @@ -383,5 +383,5 @@ Documentation/filesystems/vfs.txt for more details.

    permission and check_acl are inode permission checks that are called
    on many or all directory inodes on the way down a path walk (to check for
    -exec permission). These must now be rcu-walk aware (flags & IPERM_RCU). See
    -Documentation/filesystems/vfs.txt for more details.
    +exec permission). These must now be rcu-walk aware (flags & IPERM_FLAG_RCU).
    +See Documentation/filesystems/vfs.txt for more details.
    diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
    index fbb324e..de8a967 100644
    --- a/Documentation/filesystems/vfs.txt
    +++ b/Documentation/filesystems/vfs.txt
    @@ -415,9 +415,9 @@ otherwise noted.
    permission: called by the VFS to check for access rights on a POSIX-like
    filesystem.

    - May be called in rcu-walk mode (flags & IPERM_RCU). If in rcu-walk
    - mode, the filesystem must check the permission without blocking or
    - storing to the inode.
    + May be called in rcu-walk mode (flags & IPERM_FLAG_RCU). If in
    + rcu-walk mode, the filesystem must check the permission without
    + blocking or storing to the inode.

    If a situation is encountered that rcu-walk cannot handle, return
    -ECHILD and it will be called again in ref-walk mode.
    5B5B
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