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)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 3 Dec 2012 19:46:37 +0000 (11:46 -0800)
commit8433fcce61cd330b1096e2e4d7601d5251d95b6c
tree934d8378e980fe658c4d02b2eaaa8bf0fde751fe
parent9d4f96299744ee7b8e2c4ad30ee915f1671e9fba
x86, efi: Fix processor-specific memcpy() build error

commit 0f905a43ce955b638139bd84486194770a6a2c08 upstream.

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>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/x86/boot/compressed/eboot.c