From: Nathan Chancellor <nathan@kernel.org>
To: linux-kbuild@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
"René Rebe" <rene@exactco.de>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
Christophe Leroy <chleroy@kernel.org>
Subject: Re: [PATCH V2] modpost: Amend ppc64 save/restfpr symnames for -Os build
Date: Tue, 03 Feb 2026 17:16:23 -0700 [thread overview]
Message-ID: <177016418333.1146354.10778952252153726089.b4-ty@kernel.org> (raw)
In-Reply-To: <20251123.131330.407910684435629198.rene@exactco.de>
On Sun, 23 Nov 2025 13:13:30 +0100, René Rebe wrote:
> Building a size optimized ppc64 kernel (-Os), gcc emits more FP
> save/restore symbols, that the linker generates on demand into the
> .sfpr section. Explicitly allow-list those in scripts/mod/modpost.c,
> too. They are needed for the amdgpu in-kernel floating point support.
>
> MODPOST Module.symvers
> ERROR: modpost: "_restfpr_20" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "_restfpr_26" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "_restfpr_22" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "_savegpr1_27" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "_savegpr1_25" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "_restfpr_28" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "_savegpr1_29" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "_savefpr_20" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "_savefpr_22" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "_restfpr_15" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> WARNING: modpost: suppressed 56 unresolved symbol warnings because there were too many)
>
> [...]
Applied to
https://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux.git kbuild-next
Thanks!
[1/1] modpost: Amend ppc64 save/restfpr symnames for -Os build
https://git.kernel.org/kbuild/c/3cd9763ce4ad9
Please look out for regression or issue reports or other follow up
comments, as they may result in the patch/series getting dropped or
reverted. Patches applied to an "unstable" branch are accepted pending
wider testing in -next and any post-commit review; they will generally
be moved to the main branch in a week if no issues are found.
Best regards,
--
Nathan Chancellor <nathan@kernel.org>
prev parent reply other threads:[~2026-02-04 0:16 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-23 12:13 [PATCH V2] modpost: Amend ppc64 save/restfpr symnames for -Os build René Rebe
2025-11-23 14:57 ` Christophe Leroy (CS GROUP)
2025-11-23 15:09 ` René Rebe
2025-11-23 15:25 ` René Rebe
2026-02-03 6:48 ` Nathan Chancellor
2026-02-03 9:18 ` René Rebe
2025-11-26 0:16 ` Erhard Furtner
2026-02-04 0:16 ` Nathan Chancellor [this message]
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