mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-30 16:07:39 +00:00
b16d8c231e
Building a 32-bit kernel with CONFIG_X86_USE_3DNOW and CONFIG_EFI_STUB leads to the following build error, drivers/firmware/efi/libstub/lib.a(efi-stub-helper.o): In function `efi_relocate_kernel': efi-stub-helper.c:(.text+0xda5): undefined reference to `_mmx_memcpy' This is due to the fact that the EFI boot stub pulls in the 3DNow optimized versions of the memcpy() prototype from arch/x86/include/asm/string_32.h, even though the _mmx_memcpy() implementation isn't available in the EFI stub. For now, predicate CONFIG_EFI_STUB on !CONFIG_X86_USE_3DNOW. This is most definitely a temporary fix. A complete solution will involve selectively including kernel headers/symbols into the early-boot execution environment of the EFI boot stub, i.e. something analogous to the way that the _SETUP symbol is used. Previous attempts have been made to fix this kind of problem, though none seem to have ever been merged, http://lkml.kernel.org/r/20120329104822.GA17233@x1.osrc.amd.com Clearly, this problem has been around for a long time. Reported-by: Ingo Molnar <mingo@kernel.org> Cc: Borislav Petkov <bp@suse.de> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Link: http://lkml.kernel.org/r/1407193939-27813-1-git-send-email-matt@console-pimps.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> |
||
---|---|---|
.. | ||
alpha | ||
arc | ||
arm | ||
arm64 | ||
avr32 | ||
blackfin | ||
c6x | ||
cris | ||
frv | ||
hexagon | ||
ia64 | ||
m32r | ||
m68k | ||
metag | ||
microblaze | ||
mips | ||
mn10300 | ||
openrisc | ||
parisc | ||
powerpc | ||
s390 | ||
score | ||
sh | ||
sparc | ||
tile | ||
um | ||
unicore32 | ||
x86 | ||
xtensa | ||
.gitignore | ||
Kconfig |