Unverified Commit 3cd9763c authored by René Rebe's avatar René Rebe Committed by Nathan Chancellor
Browse files

modpost: Amend ppc64 save/restfpr symnames for -Os build 



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)

Signed-off-by: default avatarRené Rebe <rene@exactco.de>
Link: https://patch.msgid.link/20251123.131330.407910684435629198.rene@exactco.de


Signed-off-by: default avatarNathan Chancellor <nathan@kernel.org>
parent 87abe931

scripts/mod/modpost.c

+4 −0
Original line number Diff line number Diff line
@@ -602,6 +602,10 @@ static int ignore_undef_symbol(struct elf_info *info, const char *symname) 
		/* Special register function linked on all modules during final link of .ko */

		if (strstarts(symname, "_restgpr0_") ||

		    strstarts(symname, "_savegpr0_") ||

		    strstarts(symname, "_restgpr1_") ||

		    strstarts(symname, "_savegpr1_") ||

		    strstarts(symname, "_restfpr_") ||

		    strstarts(symname, "_savefpr_") ||

		    strstarts(symname, "_restvr_") ||

		    strstarts(symname, "_savevr_") ||

		    strcmp(symname, ".TOC.") == 0)