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SubjectRe: [PATCH] mtd: rawnand: meson: Fix linking error on 32-bit platforms
On Wed, Jan 30, 2019 at 10:32:20AM +0100, Miquel Raynal wrote:
> Hi Liang, Nathan,
>
> Liang Yang <liang.yang@amlogic.com> 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@gmail.com>
> > > ---
> > > 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@amlogic.com>
>
> 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,
> Miquèl

Hi Miquel,

That is totally fine by me, thanks for the quick response!

Nathan

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