diff --git a/include/common/hathreads.h b/include/common/hathreads.h
index 7cbb349..308bcb1 100644
--- a/include/common/hathreads.h
+++ b/include/common/hathreads.h
@@ -443,6 +443,7 @@
 	START_LOCK,
 	TLSKEYS_REF_LOCK,
 	AUTH_LOCK,
+	LOGSRV_LOCK,
 	OTHER_LOCK,
 	LOCK_LABELS
 };
@@ -559,6 +560,7 @@
 	case START_LOCK:           return "START";
 	case TLSKEYS_REF_LOCK:     return "TLSKEYS_REF";
 	case AUTH_LOCK:            return "AUTH";
+	case LOGSRV_LOCK:          return "LOGSRV";
 	case OTHER_LOCK:           return "OTHER";
 	case LOCK_LABELS:          break; /* keep compiler happy */
 	};
diff --git a/include/proto/log.h b/include/proto/log.h
index b05ab3e..7b056c5 100644
--- a/include/proto/log.h
+++ b/include/proto/log.h
@@ -54,6 +54,17 @@
 extern THREAD_LOCAL char *logline_rfc5424;
 
 
+/*
+ * Test if <idx> index numbered from 0 is in <rg> range with low and high
+ * limits of indexes numbered from 1.
+ */
+static inline int in_smp_log_range(struct smp_log_range *rg, unsigned int idx)
+{
+       if (idx + 1 <= rg->high && idx + 1 >= rg->low)
+               return 1;
+       return 0;
+}
+
 /* Initialize/Deinitialize log buffers used for syslog messages */
 int init_log_buffers();
 void deinit_log_buffers();
diff --git a/include/types/log.h b/include/types/log.h
index 9f9912a..affcd92 100644
--- a/include/types/log.h
+++ b/include/types/log.h
@@ -26,6 +26,7 @@
 #include <sys/un.h>
 #include <netinet/in.h>
 #include <common/config.h>
+#include <common/hathreads.h>
 #include <common/mini-clist.h>
 
 #define NB_LOG_FACILITIES       24
@@ -202,6 +203,7 @@
 	int minlvl;
 	int maxlen;
 	struct logsrv *ref;
+	__decl_hathreads(HA_SPINLOCK_T lock);
 };
 
 #endif /* _TYPES_LOG_H */