Make sure kernel configured properly for sparse checkings

diff --git a/kernel/include/linux/netfilter/ipset/ip_set_compat.h b/kernel/include/linux/netfilter/ipset/ip_set_compat.h
index 940a3c3d76d70f6c32a52ce5c19d9650e6060bb4..f5edef68d2ee06d09ff082ee4c81a12e65f2e17b 100644 (file)
--- a/kernel/include/linux/netfilter/ipset/ip_set_compat.h
+++ b/kernel/include/linux/netfilter/ipset/ip_set_compat.h
@@ -20,6 +20,12 @@
 #define        __rcu
 #endif
 
+#ifdef CHECK_KCONFIG
+#ifndef CONFIG_SPARSE_RCU_POINTER
+#error "CONFIG_SPARSE_RCU_POINTER must be enabled"
+#endif
+#endif
+
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 35)
 #define xt_action_param                xt_match_param
 #endif