linux-kernel - Re: Build regressions/improvements in v5.18-rc4

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Date:   Mon, 25 Apr 2022 09:42:56 +0200 (CEST)
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     linux-kernel@...r.kernel.org
cc:     Song Liu <song@...nel.org>, Christoph Hellwig <hch@....de>,
        Rik van Riel <riel@...riel.com>, sparclinux@...r.kernel.org,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        linux-media@...r.kernel.org
Subject: Re: Build regressions/improvements in v5.18-rc4

On Mon, 25 Apr 2022, Geert Uytterhoeven wrote:
> JFYI, when comparing v5.18-rc4[1] to v5.18-rc3[3], the summaries are:
>  - build errors: +6/-7

   + /kisskb/src/drivers/media/platform/nxp/imx-pxp.h: error: initializer element is not constant:  => 582:38

powerpc-gcc5/powerpc-allmodconfig

Seen before, looks like one more large 32-bit constant with bit 31 set
lacking the "U" suffix.

   + error: arch/sparc/kernel/head_32.o: relocation truncated to fit: R_SPARC_WDISP22 against `.init.text':  => (.head.text+0x5040), (.head.text+0x5100)
   + error: arch/sparc/kernel/head_32.o: relocation truncated to fit: R_SPARC_WDISP22 against symbol `leon_smp_cpu_startup' defined in .text section in arch/sparc/kernel/trampoline_32.o:  => (.init.text+0xa4)
   + error: arch/sparc/kernel/process_32.o: relocation truncated to fit: R_SPARC_WDISP22 against `.text':  => (.fixup+0xc), (.fixup+0x4)
   + error: arch/sparc/kernel/signal_32.o: relocation truncated to fit: R_SPARC_WDISP22 against `.text':  => (.fixup+0x4), (.fixup+0x10), (.fixup+0x34), (.fixup+0x1c), (.fixup+0x28)

sparc64/sparc-allmodconfig

   + error: page_alloc.c: undefined reference to `vmalloc_huge':  => .init.text+0x1458), .init.text+0x13de), .init.text+0x1466)

sh4-gcc10/se7619_defconfig
m68k-gcc8/m5272c3_defconfig
m68k-gcc11/m5272c3_defconfig

Anything with CONFIG_MMU=n, I guess.
vmalloc_huge() is provided by mm/vmalloc.c, which is not compiled if
CONFIG_MMU=n.

> [1] http://kisskb.ellerman.id.au/kisskb/branch/linus/head/af2d861d4cd2a4da5137f795ee3509e6f944a25b/ (all 96 configs)
> [3] http://kisskb.ellerman.id.au/kisskb/branch/linus/head/b2d229d4ddb17db541098b83524d901257e93845/ (all 96 configs)

Gr{oetje,eeting}s,

 						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
 							    -- Linus Torvalds