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From: Nathan Chancellor <natechancellor@gmail.com>
To: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Boris Brezillon <bbrezillon@kernel.org>,
	Richard Weinberger <richard@nod.at>,
	linux-kernel@vger.kernel.org, Liang Yang <liang.yang@amlogic.com>,
	linux-mtd@lists.infradead.org,
	Kevin Hilman <khilman@baylibre.com>,
	linux-amlogic@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] mtd: rawnand: meson: Fix linking error on 32-bit platforms
Date: Wed, 30 Jan 2019 08:27:06 -0700	[thread overview]
Message-ID: <20190130152706.GA31999@archlinux-ryzen> (raw)
In-Reply-To: <20190130103220.27b13ab9@xps13>

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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  reply	other threads:[~2019-01-30 15:27 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-29 21:46 [PATCH] mtd: rawnand: meson: Fix linking error on 32-bit platforms Nathan Chancellor
2019-01-30  5:20 ` Liang Yang
2019-01-30  9:26 ` Liang Yang
2019-01-30  9:32   ` Miquel Raynal
2019-01-30 15:27     ` Nathan Chancellor [this message]
2019-01-31  2:42       ` Liang Yang
2019-02-05 19:06 ` Miquel Raynal

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