x86: change testing logic in putuser_64.S.

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Instead of operating over a register we need to put back
into normal state afterwards (the memory position), just
sub from rbx, which is trashed anyway. We can save a few instructions.

Also, this is the i386 way.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Glauber Costa 2008-06-24 16:51:59 -03:00 • committed by Ingo Molnar

parent 0ada316403

commit 663aa96df3

1 changed files with 12 additions and 21 deletions

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arch/x86/lib/putuser_64.S

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