From: Joseph Myers <joseph@codesourcery.com>
Date: Wed, 1 Jun 2022 14:45:48 +0000 (+0000)
Subject: Add MADV_DONTNEED_LOCKED from Linux 5.18 to bits/mman-linux.h
X-Git-Tag: glibc-2.36~209
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=de3501d60fac6d194954e0ccc7bd297f53442b3e;p=thirdparty%2Fglibc.git

Add MADV_DONTNEED_LOCKED from Linux 5.18 to bits/mman-linux.h

Linux 5.18 adds a constant MADV_DONTNEED_LOCKED (defined in multiple
header files, but with the same value on all architectures).  Add this
constant to bits/mman-linux.h.

Tested for x86_64.
---

diff --git a/sysdeps/unix/sysv/linux/bits/mman-linux.h b/sysdeps/unix/sysv/linux/bits/mman-linux.h
index 85bc4d3c3c8..cb5ad30ef9c 100644
--- a/sysdeps/unix/sysv/linux/bits/mman-linux.h
+++ b/sysdeps/unix/sysv/linux/bits/mman-linux.h
@@ -93,6 +93,8 @@
 				   readable.  */
 # define MADV_POPULATE_WRITE 23	/* Populate (prefault) page tables
 				   writable.  */
+# define MADV_DONTNEED_LOCKED 24 /* Like MADV_DONTNEED, but drop
+				    locked pages too.  */
 # define MADV_HWPOISON	  100	/* Poison a page for testing.  */
 #endif