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From: Mateusz Guzik <mjg@FreeBSD.org>
Date: Tue, 24 Jan 2017 21:48:58 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r312723 - head/sys/kern
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Author: mjg
Date: Tue Jan 24 21:48:57 2017
New Revision: 312723
URL: https://svnweb.freebsd.org/changeset/base/312723

Log:
  proc: perform a lockless check in sys_issetugid
  
  Discussed with:	kib
  MFC after:	1 week

Modified:
  head/sys/kern/kern_prot.c

Modified: head/sys/kern/kern_prot.c
==============================================================================
--- head/sys/kern/kern_prot.c	Tue Jan 24 21:30:31 2017	(r312722)
+++ head/sys/kern/kern_prot.c	Tue Jan 24 21:48:57 2017	(r312723)
@@ -1225,9 +1225,7 @@ sys_issetugid(register struct thread *td
 	 * a user without an exec - programs cannot know *everything*
 	 * that libc *might* have put in their data segment.
 	 */
-	PROC_LOCK(p);
 	td->td_retval[0] = (p->p_flag & P_SUGID) ? 1 : 0;
-	PROC_UNLOCK(p);
 	return (0);
 }