From: Amos Jeffries <squid3@treenet.co.nz>
Date: Wed, 24 Apr 2013 07:47:19 +0000 (-0600)
Subject: Hurd: define MAP_NORESERVE as no-op when missing
X-Git-Tag: SQUID_3_4_0_1~188
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=def2dae16254ab9b38ed80ebc1578be61a56c15c;p=thirdparty%2Fsquid.git

Hurd: define MAP_NORESERVE as no-op when missing

Some systems like GNU Hurd provide teh mmap() API but lack MAP_NORESERVE
support. This option is an optimization, so we can define the macro
ourselves to nil and apparently not suffer (many) bad side effects.
---

diff --git a/src/DiskIO/Mmapped/MmappedFile.cc b/src/DiskIO/Mmapped/MmappedFile.cc
index 5ae8c50a94..82a4d68b52 100644
--- a/src/DiskIO/Mmapped/MmappedFile.cc
+++ b/src/DiskIO/Mmapped/MmappedFile.cc
@@ -21,6 +21,11 @@
 #include <errno.h>
 #endif
 
+// Some systems such as Hurd provide mmap() API but do not support MAP_NORESERVE
+#ifndef MAP_NORESERVE
+#define MAP_NORESERVE 0
+#endif
+
 CBDATA_CLASS_INIT(MmappedFile);
 
 // helper class to deal with mmap(2) offset alignment and other low-level specs