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* [glibc/maskray/unnest] Add MADV_POPULATE_READ and MADV_POPULATE_WRITE from Linux 5.14 to bits/mman-linux.h
@ 2021-09-23  6:36 Fangrui Song
  0 siblings, 0 replies; only message in thread
From: Fangrui Song @ 2021-09-23  6:36 UTC (permalink / raw)
  To: glibc-cvs

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=3561106278cddd2f007bd27fd4c3e90caaf14b43

commit 3561106278cddd2f007bd27fd4c3e90caaf14b43
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Tue Sep 14 14:19:24 2021 +0000

    Add MADV_POPULATE_READ and MADV_POPULATE_WRITE from Linux 5.14 to bits/mman-linux.h
    
    Linux 5.14 adds constants MADV_POPULATE_READ and MADV_POPULATE_WRITE
    (with the same values on all architectures).  Add these to glibc's
    bits/mman-linux.h.
    
    Tested for x86_64.

Diff:
---
 sysdeps/unix/sysv/linux/bits/mman-linux.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sysdeps/unix/sysv/linux/bits/mman-linux.h b/sysdeps/unix/sysv/linux/bits/mman-linux.h
index 3b1ae418e0..31451c28d9 100644
--- a/sysdeps/unix/sysv/linux/bits/mman-linux.h
+++ b/sysdeps/unix/sysv/linux/bits/mman-linux.h
@@ -89,6 +89,10 @@
 # define MADV_KEEPONFORK  19	/* Undo MADV_WIPEONFORK.  */
 # define MADV_COLD        20	/* Deactivate these pages.  */
 # define MADV_PAGEOUT     21	/* Reclaim these pages.  */
+# define MADV_POPULATE_READ 22	/* Populate (prefault) page tables
+				   readable.  */
+# define MADV_POPULATE_WRITE 23	/* Populate (prefault) page tables
+				   writable.  */
 # define MADV_HWPOISON	  100	/* Poison a page for testing.  */
 #endif


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