linux-kernel - Re: [PATCH v3 2/3] powerpc/reloc64: add support for 32-bit CRC pseudo-symbols

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Date:   Fri, 25 Nov 2016 22:29:01 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        jeyu@...hat.com
Cc:     will.deacon@....com, rusty@...tcorp.com.au,
        akpm@...ux-foundation.org, benh@...nel.crashing.org,
        paulus@...ba.org, Ard Biesheuvel <ard.biesheuvel@...aro.org>
Subject: Re: [PATCH v3 2/3] powerpc/reloc64: add support for 32-bit CRC pseudo-symbols

Ard Biesheuvel <ard.biesheuvel@...aro.org> writes:

> diff --git a/arch/powerpc/relocs_check.sh b/arch/powerpc/relocs_check.sh
> index ec2d5c835170..2f510fbc87da 100755
> --- a/arch/powerpc/relocs_check.sh
> +++ b/arch/powerpc/relocs_check.sh
> @@ -43,7 +43,8 @@ R_PPC_ADDR16_HA
>  R_PPC_RELATIVE
>  R_PPC_NONE' |
>  	grep -E -v '\<R_PPC64_ADDR64[[:space:]]+mach_' |
> -	grep -E -v '\<R_PPC64_ADDR64[[:space:]]+__crc_'
> +	grep -E -v '\<R_PPC64_ADDR64[[:space:]]+__crc_' |
> +	grep -E -v '\<R_PPC64_ADDR32[[:space:]]+\*ABS\*'

I'm still getting:

WARNING: 24 bad relocations
c000000000d307c4 R_PPC64_ADDR32    __crc___arch_hweight16
c000000000d307c8 R_PPC64_ADDR32    __crc___arch_hweight32
c000000000d307cc R_PPC64_ADDR32    __crc___arch_hweight64
c000000000d307d0 R_PPC64_ADDR32    __crc___arch_hweight8
c000000000d30848 R_PPC64_ADDR32    __crc___bswapdi2
c000000000d30854 R_PPC64_ADDR32    __crc___clear_user
c000000000d30868 R_PPC64_ADDR32    __crc___copy_tofrom_user
c000000000d30d4c R_PPC64_ADDR32    __crc__mcount
c000000000d31344 R_PPC64_ADDR32    __crc_copy_page
c000000000d3141c R_PPC64_ADDR32    __crc_current_stack_pointer
c000000000d31840 R_PPC64_ADDR32    __crc_empty_zero_page
c000000000d31a7c R_PPC64_ADDR32    __crc_flush_dcache_range
c000000000d31a84 R_PPC64_ADDR32    __crc_flush_icache_range
c000000000d32608 R_PPC64_ADDR32    __crc_load_fp_state
c000000000d32614 R_PPC64_ADDR32    __crc_load_vr_state
c000000000d32828 R_PPC64_ADDR32    __crc_memchr
c000000000d32830 R_PPC64_ADDR32    __crc_memcmp
c000000000d32834 R_PPC64_ADDR32    __crc_memcpy
c000000000d32840 R_PPC64_ADDR32    __crc_memmove
c000000000d32888 R_PPC64_ADDR32    __crc_memset
c000000000d33c9c R_PPC64_ADDR32    __crc_store_fp_state
c000000000d33ca0 R_PPC64_ADDR32    __crc_store_vr_state
c000000000d33cf0 R_PPC64_ADDR32    __crc_strncmp
c000000000d33cf4 R_PPC64_ADDR32    __crc_strncpy


If I just add those to the whitelist it builds, but then things aren't
happy at boot:


[    7.607687] kvm: disagrees about version of symbol module_layout
[    7.846799] virtio: disagrees about version of symbol module_layout
[   22.012615] crc32c_vpmsum: disagrees about version of symbol module_layout
[   22.012959] libcrc32c: disagrees about version of symbol module_layout


cheers