svn commit: r296543 - head/sys/compat/linux

[Dmitry Chagin]

Author: dchagin
Date: Tue Mar  8 19:20:57 2016
New Revision: 296543
URL: https://svnweb.freebsd.org/changeset/base/296543

Log:
  Put a commit message from r296502 about Linux alarm() system call
  behaviour to the source.
  
  Suggested by:	emaste@
  
  MFC after:	1 week

Modified:
  head/sys/compat/linux/linux_misc.c

Modified: head/sys/compat/linux/linux_misc.c
==============================================================================
--- head/sys/compat/linux/linux_misc.c	Tue Mar  8 19:08:55 2016	(r296542)
+++ head/sys/compat/linux/linux_misc.c	Tue Mar  8 19:20:57 2016	(r296543)
@@ -206,6 +206,11 @@ linux_alarm(struct thread *td, struct li
 	it.it_value.tv_usec = 0;
 	it.it_interval.tv_sec = 0;
 	it.it_interval.tv_usec = 0;
+	/*
+	 * According to POSIX and Linux implementation
+	 * the alarm() system call is always successfull.
+	 * Ignore errors and return 0 as a Linux do.
+	 */
 	kern_setitimer(td, ITIMER_REAL, &it, &old_it);
 	if (timevalisset(&old_it.it_value)) {
 		if (old_it.it_value.tv_usec != 0)