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SubjectRe: linux-next: build failure after merge of the nand tree
Hi Paul,

Paul Cercueil <paul@crapouillou.net> wrote on Tue, 02 Apr 2019 01:31:52
+0200:

> Hi Stephen,
>
> Le mar. 2 avril 2019 à 1:14, Stephen Rothwell <sfr@canb.auug.org.au> a écrit :
> > Hi all,
> >
> > After merging the nand tree, today's linux-next build (x86_64
> > allmodconfig) failed like this:
> >
> > drivers/mtd/nand/raw/ingenic/ingenic_ecc.c:26:5: error: redefinition > of 'ingenic_ecc_calculate'
> > int ingenic_ecc_calculate(struct ingenic_ecc *ecc,
> > ^~~~~~~~~~~~~~~~~~~~~
> > In file included from drivers/mtd/nand/raw/ingenic/ingenic_ecc.c:14:
> > drivers/mtd/nand/raw/ingenic/ingenic_ecc.h:39:5: note: previous > definition of 'ingenic_ecc_calculate' was here
> > int ingenic_ecc_calculate(struct ingenic_ecc *ecc,
> > ^~~~~~~~~~~~~~~~~~~~~
> > drivers/mtd/nand/raw/ingenic/ingenic_ecc.c:47:5: error: redefinition > of 'ingenic_ecc_correct'
> > int ingenic_ecc_correct(struct ingenic_ecc *ecc,
> > ^~~~~~~~~~~~~~~~~~~
> > In file included from drivers/mtd/nand/raw/ingenic/ingenic_ecc.c:14:
> > drivers/mtd/nand/raw/ingenic/ingenic_ecc.h:46:5: note: previous > definition of 'ingenic_ecc_correct' was here
> > int ingenic_ecc_correct(struct ingenic_ecc *ecc,
> > ^~~~~~~~~~~~~~~~~~~
> > drivers/mtd/nand/raw/ingenic/ingenic_ecc.c:93:21: error: redefinition > of 'of_ingenic_ecc_get'
> > struct ingenic_ecc *of_ingenic_ecc_get(struct device_node *of_node)
> > ^~~~~~~~~~~~~~~~~~
> > In file included from drivers/mtd/nand/raw/ingenic/ingenic_ecc.c:14:
> > drivers/mtd/nand/raw/ingenic/ingenic_ecc.h:57:21: note: previous > definition of 'of_ingenic_ecc_get' was here
> > struct ingenic_ecc *of_ingenic_ecc_get(struct device_node *np)
> > ^~~~~~~~~~~~~~~~~~
> > drivers/mtd/nand/raw/ingenic/ingenic_ecc.c:119:6: error: redefinition > of 'ingenic_ecc_release'
> > void ingenic_ecc_release(struct ingenic_ecc *ecc)
> > ^~~~~~~~~~~~~~~~~~~
> > In file included from drivers/mtd/nand/raw/ingenic/ingenic_ecc.c:14:
> > drivers/mtd/nand/raw/ingenic/ingenic_ecc.h:53:6: note: previous > definition of 'ingenic_ecc_release' was here
> > void ingenic_ecc_release(struct ingenic_ecc *ecc)
> > ^~~~~~~~~~~~~~~~~~~
> >
> > Caused by commit
> >
> > 8278ad0d709a ("mtd: rawnand: ingenic: Separate top-level and SoC > specific code")
> >
> > I have used the nand tree from next-20190401 for today.
>
> That makes no sense to me; from the offsets of the errors in the ingenic_ecc.h
> file, it seems that CONFIG_MTD_NAND_INGENIC_ECC is not set, and in this case
> ingenic_ecc.c should not be compiled at all.
>

I think

#ifdef FOO

evaluates to true if

FOO=y

while we can have

FOO=m

which is evaluated to false, hence the double definition with
allmodconfig.

Here is a diff solving the issue, if you are fine with it I will
correct in-place and push -f nand/next for tomorrow's build.

---8<---
diff --git a/drivers/mtd/nand/raw/ingenic/ingenic_ecc.h b/drivers/mtd/nand/raw/ingenic/ingenic_ecc.h
index d0486f963cc9..2cda439b5e11 100644
--- a/drivers/mtd/nand/raw/ingenic/ingenic_ecc.h
+++ b/drivers/mtd/nand/raw/ingenic/ingenic_ecc.h
@@ -25,7 +25,7 @@ struct ingenic_ecc_params {
int strength;
};

-#ifdef CONFIG_MTD_NAND_INGENIC_ECC
+#if IS_ENABLED(CONFIG_MTD_NAND_INGENIC_ECC)
int ingenic_ecc_calculate(struct ingenic_ecc *ecc,
struct ingenic_ecc_params *params,
const u8 *buf, u8 *ecc_code);
--->8---

Thanks,
Miquèl

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