On Wed, 4 Jun 2014, scame...@beardog.cce.hp.com wrote:
> > Find_first_zero_bit considers BITS_PER_LONG bits at a time, and thus may > > return a larger number than the maximum position argument if that position > > is not a multiple of BITS_PER_LONG. > > > > The semantic match that finds this problem is as follows: > > (http://coccinelle.lip6.fr/) > > > > // <smpl> > > @@ > > expression e1,e2,e3; > > statement S1,S2; > > @@ > > > > e1 = find_first_zero_bit(e2,e3) > > ... > > if (e1 > > - == > > + >= > > e3) > > S1 else S2 > > // </smpl> > > > > Signed-off-by: Julia Lawall <julia.law...@lip6.fr> > > > > --- > > drivers/block/cciss.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff -u -p a/drivers/block/cciss.c b/drivers/block/cciss.c > > --- a/drivers/block/cciss.c > > +++ b/drivers/block/cciss.c > > @@ -980,7 +980,7 @@ static CommandList_struct *cmd_alloc(ctl > > > > do { > > i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds); > > - if (i == h->nr_cmds) > > + if (i >= h->nr_cmds) > > return NULL; > > } while (test_and_set_bit(i, h->cmd_pool_bits) != 0); > > c = h->cmd_pool + i; > > > Thanks. Ack. > > You can add > > Reviewed-by: Stephen M. Cameron <scame...@beardog.cce.hp.com> > > to this patch if you want. > > You might consider adding "Cc: sta...@vger.kernel.org" into the > sign-off area as well. Likewise here, the change is not needed. julia -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
