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[RFA] linux-nat.c, linux_thread_alive, user errno instead of err


kill_lwp doesn't return errno.

2011-03-01  Michael Snyder  <msnyder@msnyder-server.eng.vmware.com>

	* linux-nat.c (linux_thread_alive): kill_lwp does not return
	an errno.

Index: linux-nat.c
===================================================================
RCS file: /cvs/src/src/gdb/linux-nat.c,v
retrieving revision 1.197
diff -u -p -u -p -r1.197 linux-nat.c
--- linux-nat.c	1 Mar 2011 00:40:22 -0000	1.197
+++ linux-nat.c	1 Mar 2011 23:50:34 -0000
@@ -4045,7 +4045,7 @@ linux_thread_alive (ptid_t ptid)
     fprintf_unfiltered (gdb_stdlog,
 			"LLTA: KILL(SIG0) %s (%s)\n",
 			target_pid_to_str (ptid),
-			err ? safe_strerror (err) : "OK");
+			err ? safe_strerror (errno) : "OK");
 
   if (err != 0)
     return 0;

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