Re: [PATCH] MIPS: tracing: Optimize the implementation

[Ralf Baechle <ralf@linux-mips.org>]

On Fri, Mar 12, 2010 at 09:50:53AM +0100, Thomas Bogendoerfer wrote:

> On Fri, Mar 12, 2010 at 02:07:37AM +0800, Wu Zhangjin wrote:
> > +/*
> > + * If the Instruction Pointer is in module space (0xc0000000), return ture;
> > + * otherwise, it is in kernel space (0x80000000), return false.
> > + */
> > +#define in_module(ip) (unlikely((ip) & 0x40000000))
> > +
> 
> looks broken for 64bit, but maybe this is a 32bit only feature...

This gem did already exist in the old code, so no regression:

        if (ip & 0x40000000) {

  Ralf