On Fri, Sep 06, 2013 at 05:28:07PM -0400, beh...@converseincode.com wrote: > From: Behan Webster <beh...@converseincode.com> > > A macro to get the current stack pointer which allows for a single place in > which to do so with ASM. Before this named registers (a gcc extension) was > used > to get the stack pointer. Using ASM is a more portable way of getting the > stack > pointer which works with both gcc and clang. This macro is of the same name > used in the X86 arch.
This will result in less optimal code - rather than the compiler being able to mask directly with 'sp', it's going to have to use this bit of assembly to first move it into another register. Why do we want this change? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
