• Steven Rostedt's avatar
    ftrace: consolidate mutexes · e6ea44e9
    Steven Rostedt authored
    Impact: clean up
    
    Now that ftrace_lock is a mutex, there is no reason to have three
    different mutexes protecting similar data. All the mutex paths
    are not in hot paths, so having a mutex to cover more data is
    not a problem.
    
    This patch removes the ftrace_sysctl_lock and ftrace_start_lock
    and uses the ftrace_lock to protect the locations that were protected
    by these locks. By doing so, this change also removes some of
    the lock nesting that was taking place.
    
    There are still more mutexes in ftrace.c that can probably be
    consolidated, but they can be dealt with later. We need to be careful
    about the way the locks are nested, and by consolidating, we can cause
    a recursive deadlock.
    Signed-off-by: default avatarSteven Rostedt <srostedt@redhat.com>
    e6ea44e9
ftrace.c 47.8 KB