Re: [dpdk-dev] [PATCH v2 1/3] test/rcu: fix the compiling error for armv8.2

[Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>]

> > <snip>
> >
> > > > Subject: [EXT] [PATCH v2 1/3] test/rcu: fix the compiling error
> > > > for
> > > > armv8.2
> > > >
> > > > With "-march=armv8.2-a" specified, a compiling error generated:
> > > > app/test/test_rcu_qsbr.c:234:10: error: comparison of integer
> > > > expressions of different signedness: ‘unsigned int’ and ‘int’
> > > > [-Werror=sign-compare]
> > > >
> > > > Fixes: b87089b0bb19 ("test/rcu: add API and functional tests")
> > > > Cc: stable@dpdk.org
> > > >
> > > > Signed-off-by: Gavin Hu <gavin.hu@arm.com>
> > > > Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
> > > > Reviewed-by: Steve Capper <steve.capper@arm.com>
> > >
> > >
> > > Reviewed-by: Jerin Jacob <jerinj@marvell.com>
> > This should be fixed already due to commit 104dbec2081.
> > Gavin, can you please verify? If yes, we can skip this patch.
> No, just ran and the issue persisted with the above commit in place.
> I see the above commit was to fix a limited range of data type issue, this
> commit is to fix a signedness issue.
> ~/dpdk/app/test/test_rcu_qsbr.c: In function
> ‘test_rcu_qsbr_thread_unregister’:
> ~/dpdk/app/test/test_rcu_qsbr.c:233:10: error: comparison of integer
> expressions of different signedness: ‘unsigned int’ and ‘int’ [-Werror=sign-
> compare]
>     if (i == (RTE_MAX_LCORE - 10))
Ok, it is the right side of the 'if' (not the left side).

Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>

> >
> > >
> > >
> > > > ---
> > > >  app/test/test_rcu_qsbr.c | 2 +-
> > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > >
> > > > diff --git a/app/test/test_rcu_qsbr.c b/app/test/test_rcu_qsbr.c
> > > > index 1d273e3..b008c9d 100644
> > > > --- a/app/test/test_rcu_qsbr.c
> > > > +++ b/app/test/test_rcu_qsbr.c
> > > > @@ -231,7 +231,7 @@ test_rcu_qsbr_thread_unregister(void)
> > > >  /* Update quiescent state counter */  for (i = 0; i <
> > > > num_threads[j]; i++) {
> > > >  /* Skip one update */
> > > > -if (i == (RTE_MAX_LCORE - 10))
> > > > +if (i == (unsigned int)(RTE_MAX_LCORE - 10))
> > > >  continue;
> > > >  rte_rcu_qsbr_quiescent(t[0],
> > > >  (j == 2) ? (RTE_MAX_LCORE - 1) : i);
> > > > --
> > > > 2.7.4
> >
>