On Fri, Jun 10, 2011 at 10:38:38PM +0530, Naman shekhar Mishra wrote: > I have seen this macro at a lot of places. e.g. ENTRY(system_call).Can anyone tell me where is it defined and what does it do? > (kernel version 2.6.39). You can find it in include/linux/linkage.h. HTH a bit, Jonathan Neuschäfer