PR/52239 CVS commit: src/sys/uvm

["Chuck Silvers" <chs%netbsd.org@localhost>]

The following reply was made to PR kern/52239; it has been noted by GNATS.

From: "Chuck Silvers" <chs%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/52239 CVS commit: src/sys/uvm
Date: Fri, 19 May 2017 15:30:19 +0000

 Module Name:	src
 Committed By:	chs
 Date:		Fri May 19 15:30:19 UTC 2017
 
 Modified Files:
 	src/sys/uvm: uvm_map.c uvm_mmap.c
 
 Log Message:
 make MAP_FIXED mapping operations atomic. fixes PR 52239.
 previously, unmapping any entries being replaced was done separately
 from entering the new mapping, which allowed another thread doing
 a non-MAP_FIXED mapping to allocate the range out from under the
 MAP_FIXED thread.
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.346 -r1.347 src/sys/uvm/uvm_map.c
 cvs rdiff -u -r1.164 -r1.165 src/sys/uvm/uvm_mmap.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.