From 40a4d331c7fdacd1d7e20101b4e5cdedc566b53b Mon Sep 17 00:00:00 2001
From: David Carlier <devnexen@gmail.com>
Date: Wed, 4 Dec 2024 22:09:51 +0000
Subject: [PATCH] Adding MAP_DROPPABLE for Linux (6.11)

ref: https://github.com/torvalds/linux/blob/feffde684ac29a3b7aec82d2df850fbdbdee55e4/include/uapi/linux/mman.h#L20
---
 libc-test/build.rs               | 3 +++
 libc-test/semver/linux.txt       | 1 +
 src/unix/linux_like/linux/mod.rs | 1 +
 3 files changed, 5 insertions(+)

diff --git a/libc-test/build.rs b/libc-test/build.rs
index 2927837976f9..a384cddfb71d 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -4246,6 +4246,9 @@ fn test_linux(target: &str) {
             "EPIOCSPARAMS"
             | "EPIOCGPARAMS" => true,
 
+            // FIXME: Requires >= 6.11 kernel headers.
+            "MAP_DROPPABLE" => true,
+
             _ => false,
         }
     });
diff --git a/libc-test/semver/linux.txt b/libc-test/semver/linux.txt
index f658187fbca9..5d2bdf61d02a 100644
--- a/libc-test/semver/linux.txt
+++ b/libc-test/semver/linux.txt
@@ -1586,6 +1586,7 @@ MADV_UNMERGEABLE
 MADV_WILLNEED
 MADV_WIPEONFORK
 MAP_DENYWRITE
+MAP_DROPPABLE
 MAP_EXECUTABLE
 MAP_FILE
 MAP_FIXED_NOREPLACE
diff --git a/src/unix/linux_like/linux/mod.rs b/src/unix/linux_like/linux/mod.rs
index eb24e71b60ba..0a958b4f6b4c 100644
--- a/src/unix/linux_like/linux/mod.rs
+++ b/src/unix/linux_like/linux/mod.rs
@@ -4767,6 +4767,7 @@ pub const UDP_NO_CHECK6_RX: c_int = 102;
 
 // include/uapi/linux/mman.h
 pub const MAP_SHARED_VALIDATE: c_int = 0x3;
+pub const MAP_DROPPABLE: c_int = 0x8;
 
 // include/uapi/asm-generic/mman-common.h
 pub const MAP_FIXED_NOREPLACE: c_int = 0x100000;