imfs.h: warning cast from pointer to integer of different size

[Sebastian Huber]

----- Joel Sherrill <joel.sherrill at oarcorp.com> schrieb:
> 
> 
> On March 19, 2015 9:52:56 AM CDT, Gedare Bloom <gedare at rtems.org> wrote:
> >On Thu, Mar 19, 2015 at 10:49 AM, Joel Sherrill
> ><joel.sherrill at oarcorp.com> wrote:
> >> Hi
> >>
> >> On one platform, we get a warning for this piece of code in imfs.h
> >>
> >> static inline ino_t IMFS_node_to_ino( const IMFS_jnode_t *node )
> >> {
> >>   return (ino_t) node;
> >> }
> >>
> >> On this target, "typedef unsigned long ino_t;" and
> >> sizeof(void *) < sizeof(unsigned long) so the cast is safe.
> >>
> >> Would we be better off with ino_t being uintptr_t since we
> >> do cast it back and forth?
> >>
> >> Any other suggestions?
> >>
> >The safest fix is to use the new CPU_Uint32ptr type. This resolves to
> >uintptr_t on most 32-bit+ archs.
> 
> The type ino_t is defined in newlib so this doesn't work.

The only requirement on the ino number is that it uniquely indentifies a node in a file system.  We only have a problem if sizeof(IMFS_jnode_t *) > sizeof(long).