linux-kernel - Re: [PATCH v3] powerpc/fsl-85xx: fix compile error

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Date:   Mon, 16 Mar 2020 20:41:12 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     WANG Wenhu <wenhu.wang@...o.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        WANG Wenhu <wenhu.wang@...o.com>,
        Allison Randal <allison@...utok.net>,
        Richard Fontana <rfontana@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Cc:     trivial@...nel.org, kernel@...o.com,
        stable <stable@...r.kernel.org>
Subject: Re: [PATCH v3] powerpc/fsl-85xx: fix compile error

WANG Wenhu <wenhu.wang@...o.com> writes:
> Include "linux/of_address.h" to fix the compile error for
> mpc85xx_l2ctlr_of_probe() when compiling fsl_85xx_cache_sram.c.
>
>   CC      arch/powerpc/sysdev/fsl_85xx_l2ctlr.o
> arch/powerpc/sysdev/fsl_85xx_l2ctlr.c: In function ‘mpc85xx_l2ctlr_of_probe’:
> arch/powerpc/sysdev/fsl_85xx_l2ctlr.c:90:11: error: implicit declaration of function ‘of_iomap’; did you mean ‘pci_iomap’? [-Werror=implicit-function-declaration]
>   l2ctlr = of_iomap(dev->dev.of_node, 0);
>            ^~~~~~~~
>            pci_iomap
> arch/powerpc/sysdev/fsl_85xx_l2ctlr.c:90:9: error: assignment makes pointer from integer without a cast [-Werror=int-conversion]
>   l2ctlr = of_iomap(dev->dev.of_node, 0);
>          ^
> cc1: all warnings being treated as errors
> scripts/Makefile.build:267: recipe for target 'arch/powerpc/sysdev/fsl_85xx_l2ctlr.o' failed
> make[2]: *** [arch/powerpc/sysdev/fsl_85xx_l2ctlr.o] Error 1
>
> Fixes: commit 6db92cc9d07d ("powerpc/85xx: add cache-sram support")

The syntax is:

Fixes: 6db92cc9d07d ("powerpc/85xx: add cache-sram support")

> Cc: stable <stable@...r.kernel.org>

The commit above went into v2.6.37.

So no one has noticed this bug since then, how? Or did something else
change to expose the problem?

cheers