linux-kernel - Re: [PATCH v2] kbuild: Handle builtin dtb file names containing hyphens

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Date:   Fri, 9 Mar 2018 01:25:18 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     James Hogan <jhogan@...nel.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Kevin Cernekee <cernekee@...il.com>,
        devicetree@...r.kernel.org,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux-MIPS <linux-mips@...ux-mips.org>,
        stable <stable@...r.kernel.org>
Subject: Re: [PATCH v2] kbuild: Handle builtin dtb file names containing hyphens

2018-03-08 20:02 GMT+09:00 James Hogan <jhogan@...nel.org>:
> cmd_dt_S_dtb constructs the assembly source to incorporate a devicetree
> FDT (that is, the .dtb file) as binary data in the kernel image. This
> assembly source contains labels before and after the binary data. The
> label names incorporate the file name of the corresponding .dtb file.
> Hyphens are not legal characters in labels, so .dtb files built into the
> kernel with hyphens in the file name result in errors like the
> following:
>
> bcm3368-netgear-cvg834g.dtb.S: Assembler messages:
> bcm3368-netgear-cvg834g.dtb.S:5: Error: : no such section
> bcm3368-netgear-cvg834g.dtb.S:5: Error: junk at end of line, first unrecognized character is `-'
> bcm3368-netgear-cvg834g.dtb.S:6: Error: unrecognized opcode `__dtb_bcm3368-netgear-cvg834g_begin:'
> bcm3368-netgear-cvg834g.dtb.S:8: Error: unrecognized opcode `__dtb_bcm3368-netgear-cvg834g_end:'
> bcm3368-netgear-cvg834g.dtb.S:9: Error: : no such section
> bcm3368-netgear-cvg834g.dtb.S:9: Error: junk at end of line, first unrecognized character is `-'
>
> Fix this by updating cmd_dt_S_dtb to transform all hyphens from the file
> name to underscores when constructing the labels.
>
> As of v4.16-rc2, 1139 .dts files across ARM64, ARM, MIPS and PowerPC
> contain hyphens in their names, but the issue only currently manifests
> on Broadcom MIPS platforms, as that is the only place where such files
> are built into the kernel. For example when CONFIG_DT_NETGEAR_CVG834G=y,
> or on BMIPS kernels when the dtbs target is used (in the latter case it
> admittedly shouldn't really build all the dtb.o files, but thats a
> separate issue).
>
> Fixes: 695835511f96 ("MIPS: BMIPS: rename bcm96358nb4ser to bcm6358-neufbox4-sercom")
> Signed-off-by: James Hogan <jhogan@...nel.org>
> Reviewed-by: Frank Rowand <frowand.list@...il.com>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>
> Cc: Michal Marek <michal.lkml@...kovi.net>
> Cc: Ralf Baechle <ralf@...ux-mips.org>
> Cc: Florian Fainelli <f.fainelli@...il.com>
> Cc: Kevin Cernekee <cernekee@...il.com>
> Cc: devicetree@...r.kernel.org
> Cc: linux-kbuild@...r.kernel.org
> Cc: linux-mips@...ux-mips.org
> Cc: <stable@...r.kernel.org> # 4.9+
> ---
> Changes in v2:
>  - Rewrite commit message (thanks Frank for some improved wording).
>  - Add Franks' reviewed-by.

Applied to linux-kbuild/fixes.  Thanks!

-- 
Best Regards
Masahiro Yamada