Re: [PATCH] mtd: rawnand: meson: Fix linking error on 32-bit platforms

[Liang Yang]

Hi Miquel, Nathan,

On 2019/1/30 23:27, Nathan Chancellor wrote:
> On Wed, Jan 30, 2019 at 10:32:20AM +0100, Miquel Raynal wrote:
> > Hi Liang, Nathan,
> >
> > Liang Yang <liang.yang@xxxxxxxxxxx> wrote on Wed, 30 Jan 2019 17:26:39
> > +0800:
> >
> > > Hi Nathan,
> > >
> > > On 2019/1/30 5:46, Nathan Chancellor wrote:
> > > > On arm little endian allyesconfig:
> > > >
> > > >     ld.lld: error: undefined symbol: __aeabi_uldivmod
> > > >     >>> referenced by meson_nand.c
> > > >     >>> mtd/nand/raw/meson_nand.o:(meson_nfc_setup_data_interface) in archive drivers/built-in.a
> > > >
> > > > The dividend tBERS_max is u64, meaning we need to use DIV_ROUND_UP_ULL
> > > > (which wraps do_div) to prevent the compiler from emitting
> > > > __aebi_uldivmod.
> > > >
> > > > Fixes: 2d570b34b41a ("mtd: rawnand: meson: add support for Amlogic NAND flash controller")
> > > > Signed-off-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
> > > > ---
> > > >    drivers/mtd/nand/raw/meson_nand.c | 4 ++--
> > > >    1 file changed, 2 insertions(+), 2 deletions(-)
> > > >
> > > > diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c
> > > > index e858d58d97b0..6f12a96195d1 100644
> > > > --- a/drivers/mtd/nand/raw/meson_nand.c
> > > > +++ b/drivers/mtd/nand/raw/meson_nand.c
> > > > @@ -1116,8 +1116,8 @@ int meson_nfc_setup_data_interface(struct nand_chip *nand, int csline,
> > > >    				       div * NFC_CLK_CYCLE);
> > > >    	meson_chip->tadl = DIV_ROUND_UP(PSEC_TO_NSEC(timings->tADL_min),
> > > >    					div * NFC_CLK_CYCLE);
> > > > -	tbers_clocks = DIV_ROUND_UP(PSEC_TO_NSEC(timings->tBERS_max),
> > > > -				    div * NFC_CLK_CYCLE);
> > > > +	tbers_clocks = DIV_ROUND_UP_ULL(PSEC_TO_NSEC(timings->tBERS_max),
> > > > +					div * NFC_CLK_CYCLE);
> > >
> > > Looks good to me:
> > >
> > > Acked-by: Liang Yang <liang.yang@xxxxxxxxxxx>
> >
> > This is nand/next material, so if you don't mind I would like to squash
> > this fix into the original commit inserting the driver.
> >
> >
> > Thanks,
> > MiquÃl
>
> Hi Miquel,
>
> That is totally fine by me, thanks for the quick response!
>
> Nathan
it is ok with me.
> .