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-rw-r--r--libc/sysdeps/linux/common/bits/kernel-features.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/common/bits/kernel-features.h b/libc/sysdeps/linux/common/bits/kernel-features.h
index db0a6d8d9..8481f0640 100644
--- a/libc/sysdeps/linux/common/bits/kernel-features.h
+++ b/libc/sysdeps/linux/common/bits/kernel-features.h
@@ -448,3 +448,20 @@
#if __LINUX_KERNEL_VERSION >= 0x020609 && defined __alpha__
#define __ASSUME_IEEE_RAISE_EXCEPTION 1
#endif
+
+/* Support for the FUTEX_CLOCK_REALTIME flag was added in 2.6.29. */
+#if __LINUX_KERNEL_VERSION >= 0x02061d
+# define __ASSUME_FUTEX_CLOCK_REALTIME 1
+#endif
+
+/* Support for PI futexes was added in 2.6.18. */
+#if __LINUX_KERNEL_VERSION >= 0x020612
+# define __ASSUME_FUTEX_LOCK_PI 1
+#endif
+
+/* Support for private futexes was added in 2.6.22. */
+#if __LINUX_KERNEL_VERSION >= 0x020616
+# define __ASSUME_PRIVATE_FUTEX 1
+#endif
+
+