PR/56932 CVS commit: src/sys/arch/m68k/m68k

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

The following reply was made to PR kern/56932; it has been noted by GNATS.

From: "Chuck Silvers" <chs%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/56932 CVS commit: src/sys/arch/m68k/m68k
Date: Sun, 31 Jul 2022 17:11:41 +0000

 Module Name:	src
 Committed By:	chs
 Date:		Sun Jul 31 17:11:41 UTC 2022
 
 Modified Files:
 	src/sys/arch/m68k/m68k: pmap_motorola.c
 
 Log Message:
 in pmap_enter_ptpage(), if we are allowed to fail then fail rather than
 waiting for memory to be available.  when we are mapping an anon or uobj page
 then we will be holding the lock for that page owner, and sleeping to wait
 for memory with a page owner lock held is illegal because the pagedaemon
 can wait for that lock, which will lead to deadlock.  fixes PR 56932.
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.76 -r1.77 src/sys/arch/m68k/m68k/pmap_motorola.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.