PR/57537 CVS commit: src/sys/external/bsd/drm2/linux

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

The following reply was made to PR kern/57537; it has been noted by GNATS.

From: "Taylor R Campbell" <riastradh%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/57537 CVS commit: src/sys/external/bsd/drm2/linux
Date: Sat, 29 Jul 2023 22:43:56 +0000

 Module Name:	src
 Committed By:	riastradh
 Date:		Sat Jul 29 22:43:56 UTC 2023
 
 Modified Files:
 	src/sys/external/bsd/drm2/linux: linux_ww_mutex.c
 
 Log Message:
 drm/linux_ww_mutex: Fix wait loops.
 
 If cv_wait_sig returns because a signal is delivered, we may
 nonetheless have been granted the lock.  It is harmless for us to
 ignore this fact in three of the four paths, but in
 ww_mutex_state_wait_sig, we may now have ownership of the lock and
 MUST NOT return failure because the caller MUST release the lock
 before destroying the ww_acquire_ctx.
 
 While here, restructure the other three loops for clarity, so they
 match the structure of the fourth and so they have a little less
 impenetrable negation.
 
 PR kern/57537
 
 XXX pullup-8
 XXX pullup-9
 XXX pullup-10
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.14 -r1.15 src/sys/external/bsd/drm2/linux/linux_ww_mutex.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.