svn commit: r356907 - stable/11/sys/compat/linuxkpi/common/src

[Konstantin Belousov]

Author: kib
Date: Mon Jan 20 09:16:06 2020
New Revision: 356907
URL: https://svnweb.freebsd.org/changeset/base/356907

Log:
  MFC r356682:
  Code must not unlock a mutex while owning the thread lock.

Modified:
  stable/11/sys/compat/linuxkpi/common/src/linux_rcu.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/compat/linuxkpi/common/src/linux_rcu.c
==============================================================================
--- stable/11/sys/compat/linuxkpi/common/src/linux_rcu.c	Mon Jan 20 08:55:27 2020	(r356906)
+++ stable/11/sys/compat/linuxkpi/common/src/linux_rcu.c	Mon Jan 20 09:16:06 2020	(r356907)
@@ -296,14 +296,13 @@ linux_synchronize_rcu(void)
 	    "linux_synchronize_rcu() can sleep");
 
 	td = curthread;
+	DROP_GIANT();
 
 	/*
 	 * Synchronizing RCU might change the CPU core this function
 	 * is running on. Save current values:
 	 */
 	thread_lock(td);
-
-	DROP_GIANT();
 
 	old_cpu = PCPU_GET(cpuid);
 	old_pinned = td->td_pinned;