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-rw-r--r--libc/sysdeps/linux/x86_64/bits/mman.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/x86_64/bits/mman.h b/libc/sysdeps/linux/x86_64/bits/mman.h
index b1a8b93d3..880390055 100644
--- a/libc/sysdeps/linux/x86_64/bits/mman.h
+++ b/libc/sysdeps/linux/x86_64/bits/mman.h
@@ -90,6 +90,8 @@
# define MADV_WILLNEED 3 /* Will need these pages. */
# define MADV_DONTNEED 4 /* Don't need these pages. */
# define MADV_REMOVE 5 /* Remove these pages and resources. */
+# define MADV_DONTFORK 10 /* Do not inherit across fork. */
+# define MADV_DOFORK 11 /* Do inherit across fork. */
#endif
/* The POSIX people had to invent similar names for the same things. */