x86, efi: Fix processor-specific memcpy() build error
authorMatt Fleming <matt.fleming@intel.com>
Tue, 20 Nov 2012 13:07:46 +0000 (13:07 +0000)
committerMatt Fleming <matt.fleming@intel.com>
Tue, 20 Nov 2012 20:52:07 +0000 (20:52 +0000)
commit0f905a43ce955b638139bd84486194770a6a2c08
tree21756a91c7a08a6aec779926a4c38781071b8d3e
parentcaaa8c6339ccefee6e834c4a8b0bec7e721e7357
x86, efi: Fix processor-specific memcpy() build error

Building for Athlon/Duron/K7 results in the following build error,

arch/x86/boot/compressed/eboot.o: In function `__constant_memcpy3d':
eboot.c:(.text+0x385): undefined reference to `_mmx_memcpy'
arch/x86/boot/compressed/eboot.o: In function `efi_main':
eboot.c:(.text+0x1a22): undefined reference to `_mmx_memcpy'

because the boot stub code doesn't link with the kernel proper, and
therefore doesn't have access to the 3DNow version of memcpy. So,
follow the example of misc.c and #undef memcpy so that we use the
version provided by misc.c.

See https://bugzilla.kernel.org/show_bug.cgi?id=50391

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Reported-by: Ryan Underwood <nemesis@icequake.net>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: stable@vger.kernel.org
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
arch/x86/boot/compressed/eboot.c