diff --git a/include/linux/mm.h b/include/linux/mm.h
index 4bf80ba3..744a14ce 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2,6 +2,7 @@
 #ifndef _TOOLS_LINUX_MM_H
 #define _TOOLS_LINUX_MM_H
 
+#include <sys/syscall.h>
 #include <linux/types.h>
 
 struct sysinfo {
@@ -20,6 +21,11 @@ struct sysinfo {
 	__u32 mem_unit;			/* Memory unit size in bytes */
 };
 
-extern void si_meminfo(struct sysinfo * val);
+
+
+static inline void si_meminfo(struct sysinfo *val)
+{
+	BUG_ON(syscall(SYS_sysinfo, val));
+}
 
 #endif /* _TOOLS_LINUX_MM_H */
diff --git a/linux/shrinker.c b/linux/shrinker.c
index 91f633b5..7658fb7e 100644
--- a/linux/shrinker.c
+++ b/linux/shrinker.c
@@ -33,21 +33,6 @@ void unregister_shrinker(struct shrinker *shrinker)
 	mutex_unlock(&shrinker_lock);
 }
 
-struct meminfo {
-	u64		total;
-	u64		available;
-};
-
-void si_meminfo(struct sysinfo *val)
-{
-	long page_size = sysconf(_SC_PAGESIZE);
-	memset(val, 0, sizeof(*val));
-	val->mem_unit = 1;
-
-	val->totalram = sysconf(_SC_PHYS_PAGES) * page_size;
-	val->freeram  = sysconf(_SC_AVPHYS_PAGES) * page_size;
-}
-
 static void run_shrinkers_allocation_failed(gfp_t gfp_mask)
 {
 	struct shrinker *shrinker;