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GCC can generate better code around descriptor update and access functions when there is not an explicit "eax" register constraint. Testing: You won't boot if this is messed up, since the TSS descriptor will be corrupted. Verified the assembler and booted. Signed-off-by: Zachary Amsden <zach@vmware.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>