[Bug runtime/20132] New: on rawhide, struct inode has changed

["dsmith at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=20132

            Bug ID: 20132
           Summary: on rawhide, struct inode has changed
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: runtime
          Assignee: systemtap at sourceware dot org
          Reporter: dsmith at redhat dot com
  Target Milestone: ---

On rawhide (4.7.0-0.rc0.git5.1.fc25.x86_64), the kernel's 'struct inode' has
changed so that 'i_mutex' no longer exists. Starting with the following commit,
a set of wrapper functions has been added in preparation for the removal of
switching that mutex to a rwsem.

====
commit 5955102c9984fa081b2d570cfac75c97eecf8f3b
Author: Al Viro <viro@zeniv.linux.org.uk>
Date:   Fri Jan 22 15:40:57 2016 -0500

    wrappers for ->i_mutex access

    parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested},
    inode_foo(inode) being mutex_foo(&inode->i_mutex).

    Please, use those for access to ->i_mutex; over the coming cycle
    ->i_mutex will become rwsem, with ->lookup() done with it held
    only shared.
====

The runtime should be updated to handle this change.

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