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-rw-r--r--misc/sys/mman.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/misc/sys/mman.h b/misc/sys/mman.h
index 4aa4a52118..5b53cd2133 100644
--- a/misc/sys/mman.h
+++ b/misc/sys/mman.h
@@ -114,6 +114,13 @@ extern int munlockall (void) __THROW;
    differ from ADDR.  */
 extern void *mremap (void *__addr, size_t __old_len, size_t __new_len,
 		     int __may_move) __THROW;
+
+/* mincore returns the memory residency status of the pages in the
+   current process's address space specified by [start, start + len).
+   The status is returned in a vector of bytes.  The least significant
+   bit of each byte is 1 if the referenced page is in memory, otherwise
+   it is zero.  */
+extern int mincore (void *__start, size_t __len, unsigned char *__vec);
 #endif
 
 __END_DECLS