Re: [PATCH] time: tick-sched: use bool for tick_stopped

[yuankuiz]

On 2018-04-21 03:24 AM, Joe Perches wrote:
> On Fri, 2018-04-20 at 14:44 +0800, yuankuiz@xxxxxxxxxxxxxx wrote:
> > On 2018-04-20 09:47 AM, yuankuiz@xxxxxxxxxxxxxx wrote:
> []
> > > [ZJ] Further prototyping has been given based on gcc for both of
> > > x86_64 and armv8-a,
> > >      unsigned int and bool share the same 1 bytes without the
> > > addtional storage for sure.
> > >      Open this and welcome if any other difference behaviour could be
> > > captured.
> >
> > [ZJ] Typo.. change 4 bytes above to 1 byte actually.
>
> Not really.
>
> unsigned int is 4 and bool is generally 1.
> Alignment padding after a bool may exist.
[ZJ] Depending on how to pack, the size was padded is variance. For 
example.
     In case of the "unsigned char" at the following, pack is happened 
and result 1 bytes.(if no more than 8 bits are used)
     In case of the "int" at the following, pack is happened but result 
4 bytes.
     I mean, I demo it but use the 1# case due for another thread 
discussion on the ichx_desc() so move a little bit from the tick_sched 
struct.