On Thu, Nov 19, 2009 at 08:01:57PM +0100, Thomas Gleixner wrote:
> Just compiled with -mincoming-stack-boundary=4 and the problem goes
> away as gcc now thinks that the incoming stack is already 16 byte
> aligned. But that might break code which actually uses SSE
Please don't do this, lying to the compiler is just going to result in
wrong-code sooner or later, with the above switch gcc will assume the
incoming stack is 16-byte aligned (which is not true in the ix86 kernel)
and could very well e.g. optimize away code that looks at
alignment of stack variables etc.
Jakub
