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authorJeremy Fitzhardinge <jeremy@goop.org>2008-07-12 02:22:00 -0700
committerIngo Molnar <mingo@elte.hu>2008-07-16 11:08:27 +0200
commit6a52e4b1cddd90fbfde8fb67021657936ee74b07 (patch)
treec876e1fafe89169f373f6b04739242b5d646fcf7 /fs/ramfs
parent71415c6a0877d5944d5dc3060f3b03513746158d (diff)
downloadlinux-6a52e4b1cddd90fbfde8fb67021657936ee74b07.tar.bz2
x86_64: further cleanup of 32-bit compat syscall mechanisms
AMD only supports "syscall" from 32-bit compat usermode. Intel and Centaur(?) only support "sysenter" from 32-bit compat usermode. Set the X86 feature bits accordingly, and set up the vdso in accordance with those bits. On the offchance we run on in a 64-bit environment which supports neither syscall nor sysenter from 32-bit mode, then fall back to the int $0x80 vdso. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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