svn commit: r275514 - in head/sys: sys vm

[John Baldwin]

Author: jhb
Date: Fri Dec  5 15:24:42 2014
New Revision: 275514
URL: https://svnweb.freebsd.org/changeset/base/275514

Log:
  Always ignore the deprecated MAP_RENAME and MAP_NORESERVE flags to mmap().
  Some old libraries may be used even with newer binaries (specifically the
  Nvidia driver libraries).
  
  Differential Revision:	https://reviews.freebsd.org/D1262
  Reviewed by:	kib

Modified:
  head/sys/sys/param.h
  head/sys/vm/vm_mmap.c

Modified: head/sys/sys/param.h
==============================================================================
--- head/sys/sys/param.h	Fri Dec  5 15:02:30 2014	(r275513)
+++ head/sys/sys/param.h	Fri Dec  5 15:24:42 2014	(r275514)
@@ -81,7 +81,6 @@
 #define	P_OSREL_SIGSEGV		700004
 #define	P_OSREL_MAP_ANON	800104
 #define	P_OSREL_MAP_FSTRICT	1100036
-#define	P_OSREL_MAP_RENAME	1100039
 
 #define	P_OSREL_MAJOR(x)	((x) / 100000)
 #endif

Modified: head/sys/vm/vm_mmap.c
==============================================================================
--- head/sys/vm/vm_mmap.c	Fri Dec  5 15:02:30 2014	(r275513)
+++ head/sys/vm/vm_mmap.c	Fri Dec  5 15:24:42 2014	(r275514)
@@ -222,8 +222,7 @@ sys_mmap(td, uap)
 	/*
 	 * Ignore old flags that used to be defined but did not do anything.
 	 */
-	if (td->td_proc->p_osrel < P_OSREL_MAP_RENAME)
-		flags &= ~(MAP_RESERVED0020 | MAP_RESERVED0040);
+	flags &= ~(MAP_RESERVED0020 | MAP_RESERVED0040);
 	
 	/*
 	 * Enforce the constraints.