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-rw-r--r--sysdeps/unix/sysv/linux/sys/eventfd.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/sys/eventfd.h b/sysdeps/unix/sysv/linux/sys/eventfd.h
index 7c6cf7196d..d942df4bf9 100644
--- a/sysdeps/unix/sysv/linux/sys/eventfd.h
+++ b/sysdeps/unix/sysv/linux/sys/eventfd.h
@@ -28,6 +28,8 @@ typedef uint64_t eventfd_t;
 /* Flags for signalfd.  */
 enum
   {
+    EFD_SEMAPHORE = 1,
+#define EFD_SEMAPHORE EFD_SEMAPHORE
     EFD_CLOEXEC = 02000000,
 #define EFD_CLOEXEC EFD_CLOEXEC
     EFD_NONBLOCK = 04000