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-rw-r--r--sysdeps/unix/sysv/linux/bits/mman-shared.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/bits/mman-shared.h b/sysdeps/unix/sysv/linux/bits/mman-shared.h
index 5bbcbbc14a..bee99c2384 100644
--- a/sysdeps/unix/sysv/linux/bits/mman-shared.h
+++ b/sysdeps/unix/sysv/linux/bits/mman-shared.h
@@ -28,12 +28,21 @@
 #  define MFD_HUGETLB 4U
 # endif
 
+/* Flags for mlock2.  */
+# ifndef MLOCK_ONFAULT
+#  define MLOCK_ONFAULT 1U
+# endif
+
 __BEGIN_DECLS
 
 /* Create a new memory file descriptor.  NAME is a name for debugging.
    FLAGS is a combination of the MFD_* constants.  */
 int memfd_create (const char *__name, unsigned int __flags) __THROW;
 
+/* Lock pages from ADDR (inclusive) to ADDR + LENGTH (exclusive) into
+   memory.  FLAGS is a combination of the MLOCK_* flags above.  */
+int mlock2 (const void *__addr, size_t __length, unsigned int __flags) __THROW;
+
 __END_DECLS
 
 #endif /* __USE_GNU */