On Tue, 6 Aug 2013, Steven Rostedt wrote: > I don't remember why I didn't use this in the first place. Perhaps I was > still in the "get_cpu" mind set. > > Also, what's the difference between "__this_cpu_inc()" and > "this_cpu_inc()"?
The fallback logic for arches not supporting segment prefixes is differnt. this_cpu_inc() disables interrupts. __this_cpu_inc() is used when you know that the scheduler cannot move the process. The code generated by both is the same on x86. > > int is_debug_stack(unsigned long addr); > > void debug_stack_set_zero(void); > > Might as well change is_debug_stack() to use __this_cpu_read() instead > of __get_cpu_var(). True and that will also shave off some instructions. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
