From ed1af4f8262b3edaefd33dba8ff695439ce0b9db Mon Sep 17 00:00:00 2001
From: Linus Groh <mail@linusgroh.de>
Date: Sun, 15 Dec 2024 15:52:10 +0000
Subject: [PATCH] Don't use madvise() on SerenityOS

SerenityOS only supports MADV_SET_VOLATILE/MADV_SET_NONVOLATILE and
returns EINVAL for MADV_DONTNEED:
https://github.com/SerenityOS/serenity/blob/b88cd185a0ec40fc10405b555507aa6f0aab8222/Kernel/Syscalls/mmap.cpp#L355-L388

See: https://github.com/ivmai/bdwgc/issues/688
---
 os_dep.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/os_dep.c b/os_dep.c
index 4f8ede626..24af7934e 100644
--- a/os_dep.c
+++ b/os_dep.c
@@ -2770,7 +2770,7 @@ block_unmap_inner(ptr_t start_addr, size_t len)
 #    ifdef SN_TARGET_PS3
     ps3_free_mem(start_addr, len);
 #    elif defined(AIX) || defined(COSMO) || defined(CYGWIN32) \
-        || defined(HPUX) || defined(SERENITY)                 \
+        || defined(HPUX)                                      \
         || (defined(LINUX) && !defined(PREFER_MMAP_PROT_NONE))
     /* On AIX, mmap(PROT_NONE) fails with ENOMEM unless the       */
     /* environment variable XPG_SUS_ENV is set to ON.             */