gdb/

* linux-nat.c (kill_lwp): Minor cleanup, move definition of
	tkill_failed into ifdef HAVE_TKILL_SYSCALL.  Move setting of errno
	there too.  Delete unnecessary resetting of errno after syscall.
	Minor comment changes to match gdbserver/linux-low.c:kill_lwp.

	gdbserver/
	* linux-low.c (kill_lwp): Use __NR_tkill instead of SYS_tkill.
	Move definition of tkill_failed to ifdef __NR_tkill to avoid gcc
	warning ifndef __NR_tkill.  Move setting of errno there too.
	Delete unnecessary resetting of errno after syscall.
	Minor comment changes to match gdb/linux-nat.c:kill_lwp.

gdb/ChangeLog

@@ -1,3 +1,10 @@
+2009-12-21  Doug Evans  <dje@google.com>
+
+	* linux-nat.c (kill_lwp): Minor cleanup, move definition of
+	tkill_failed into ifdef HAVE_TKILL_SYSCALL.  Move setting of errno
+	there too.  Delete unnecessary resetting of errno after syscall.
+	Minor comment changes to match gdbserver/linux-low.c:kill_lwp.
+
 2009-12-21  Alan Modra  <amodra@gmail.com>
 
 	* MAINTAINERS: Update my email address.

gdb/gdbserver/ChangeLog

@@ -1,5 +1,11 @@
 2009-12-21  Doug Evans  <dje@google.com>
 
+	* linux-low.c (kill_lwp): Use __NR_tkill instead of SYS_tkill.
+	Move definition of tkill_failed to ifdef __NR_tkill to avoid gcc
+	warning ifndef __NR_tkill.  Move setting of errno there too.
+	Delete unnecessary resetting of errno after syscall.
+	Minor comment changes to match gdb/linux-nat.c:kill_lwp.
+
 	* configure.ac: Check for dladdr.
 	* config.in: Regenerate.
 	* configure: Regenerate.

gdb/gdbserver/linux-low.c

@@ -1572,25 +1572,29 @@ linux_wait (ptid_t ptid,
   return event_ptid;
 }
 
-/* Send a signal to an LWP.  For LinuxThreads, kill is enough; however, if
-   thread groups are in use, we need to use tkill.  */
+/* Send a signal to an LWP.  */
 
 static int
 kill_lwp (unsigned long lwpid, int signo)
 {
-  static int tkill_failed;
+  /* Use tkill, if possible, in case we are using nptl threads.  If tkill
+     fails, then we are not using nptl threads and we should be using kill.  */
 
-  errno = 0;
+#ifdef __NR_tkill
+  {
+    static int tkill_failed;
 
-#ifdef SYS_tkill
-  if (!tkill_failed)
-    {
-      int ret = syscall (SYS_tkill, lwpid, signo);
-      if (errno != ENOSYS)
-	return ret;
-      errno = 0;
-      tkill_failed = 1;
-    }
+    if (!tkill_failed)
+      {
+	int ret;
+
+	errno = 0;
+	ret = syscall (__NR_tkill, lwpid, signo);
+	if (errno != ENOSYS)
+	  return ret;
+	tkill_failed = 1;
+      }
+  }
 #endif
 
   return kill (lwpid, signo);

gdb/linux-nat.c

@@ -2034,27 +2034,29 @@ linux_nat_resume (struct target_ops *ops,
     target_async (inferior_event_handler, 0);
 }
 
-/* Issue kill to specified lwp.  */
-
-static int tkill_failed;
+/* Send a signal to an LWP.  */
 
 static int
 kill_lwp (int lwpid, int signo)
 {
-  errno = 0;
-
-/* Use tkill, if possible, in case we are using nptl threads.  If tkill
-   fails, then we are not using nptl threads and we should be using kill.  */
+  /* Use tkill, if possible, in case we are using nptl threads.  If tkill
+     fails, then we are not using nptl threads and we should be using kill.  */
 
 #ifdef HAVE_TKILL_SYSCALL
-  if (!tkill_failed)
-    {
-      int ret = syscall (__NR_tkill, lwpid, signo);
-      if (errno != ENOSYS)
-	return ret;
-      errno = 0;
-      tkill_failed = 1;
-    }
+  {
+    static int tkill_failed;
+
+    if (!tkill_failed)
+      {
+	int ret;
+
+	errno = 0;
+	ret = syscall (__NR_tkill, lwpid, signo);
+	if (errno != ENOSYS)
+	  return ret;
+	tkill_failed = 1;
+      }
+  }
 #endif
 
   return kill (lwpid, signo);