diff options
| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2015-02-02 11:47:31 -0500 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2015-02-02 11:47:31 -0500 |
| commit | dfbc1534eac550b37df592a8a0b550cd47539d0b (patch) | |
| tree | ec2f50ac271be0bad556e5e22a204bddc1f63a9a /include/linux/rmap.h | |
| parent | 7eeafbcab47fe9860e5106286db83d60e3f35644 (diff) | |
| parent | 163f9eb95a10371ead59b62087e0d4e7ce53112e (diff) | |
Merge branch 'debugfs_automount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs into trace/ftrace/tracefs
Pull in Al Viro's changes to debugfs that implement the new primitive:
debugfs_create_automount(), that creates a directory in debugfs that will
safely mount another file system automatically when debugfs is mounted.
This will let tracefs automount itself on top of debugfs/tracing directory.
Diffstat (limited to 'include/linux/rmap.h')
| -rw-r--r-- | include/linux/rmap.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/rmap.h b/include/linux/rmap.h index c0c2bce6b0b7..d9d7e7e56352 100644 --- a/include/linux/rmap.h +++ b/include/linux/rmap.h @@ -37,6 +37,16 @@ struct anon_vma { atomic_t refcount; /* + * Count of child anon_vmas and VMAs which points to this anon_vma. + * + * This counter is used for making decision about reusing anon_vma + * instead of forking new one. See comments in function anon_vma_clone. + */ + unsigned degree; + + struct anon_vma *parent; /* Parent of this anon_vma */ + + /* * NOTE: the LSB of the rb_root.rb_node is set by * mm_take_all_locks() _after_ taking the above lock. So the * rb_root must only be read/written after taking the above lock |