[rtems commit] posix/src/mutexinit.c: Fix used before initialized warning

[Joel Sherrill]

On Tue, Apr 25, 2017 at 7:25 PM, Gedare Bloom <gedare at rtems.org> wrote:

> On Tue, Apr 25, 2017 at 7:14 PM, Joel Sherrill <joel at rtems.org> wrote:
> > Module:    rtems
> > Branch:    master
> > Commit:    6601684f74f0ea1ec44fb52ec75d52215af11f5f
> > Changeset: http://git.rtems.org/rtems/commit/?id=
> 6601684f74f0ea1ec44fb52ec75d52215af11f5f
> >
> > Author:    Joel Sherrill <joel at rtems.org>
> > Date:      Tue Apr 25 13:57:03 2017 -0500
> >
> > posix/src/mutexinit.c: Fix used before initialized warning
> >
> > ---
> >
> >  cpukit/posix/src/mutexinit.c | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/cpukit/posix/src/mutexinit.c b/cpukit/posix/src/mutexinit.c
> > index 39139a4..47e0bcb 100644
> > --- a/cpukit/posix/src/mutexinit.c
> > +++ b/cpukit/posix/src/mutexinit.c
> > @@ -40,6 +40,9 @@ int pthread_mutex_init(
> >    const Scheduler_Control   *scheduler;
> >    Priority_Control           priority;
> >
> > +  /* initialize to avoid warning for used uninitialized */
> > +  priority = 0;
> > +
> The warning is spurious. You could refactor the code so the compiler
> doesn't get confused.
>

If you see how to do it, please go ahead. I have looked into this multiple
times over the years and not found the magic.



>
> >    if ( attr ) the_attr = attr;
> >    else        the_attr = &_POSIX_Mutex_Default_attributes;
> >
> >
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