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/usr/share/systemtap/runtime/autoconf-grsecurity.c is in systemtap-common 1.6-1ubuntu1.

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/* PR10551: pax/grsecurity changes linux/module.h */

#include <linux/module.h>

struct module *t;
unsigned size;

void foo (void)
{
   size += t->init_size_rw + t->init_size_rx + t->core_size_rw + t->core_size_rx;  
}