kernel.h: fix might_sleep kernel-doc

Put the kernel-doc for might_sleep() _immediately_ before the macro
(no intervening lines).  Otherwise kernel-doc complains like so:

Warning(linux-2.6.27-rc3-git2//include/linux/kernel.h:129): No description found for parameter 'file'
Warning(linux-2.6.27-rc3-git2//include/linux/kernel.h:129): No description found for parameter 'line'

because kernel-doc is looking at the wrong function prototype (i.e.,
__might_sleep).  [Yes, I have a todo note to myself to check/warn for that
inconsistency in scripts/kernel-doc.]

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: <Uwe.Kleine-Koenig@digi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/kernel.h

@@ -116,6 +116,8 @@ extern int _cond_resched(void);
 # define might_resched() do { } while (0)
 #endif
 
+#ifdef CONFIG_DEBUG_SPINLOCK_SLEEP
+  void __might_sleep(char *file, int line);
 /**
  * might_sleep - annotation for functions that can sleep
  *
@@ -126,8 +128,6 @@ extern int _cond_resched(void);
  * be bitten later when the calling function happens to sleep when it is not
  * supposed to.
  */
-#ifdef CONFIG_DEBUG_SPINLOCK_SLEEP
-  void __might_sleep(char *file, int line);
 # define might_sleep() \
 	do { __might_sleep(__FILE__, __LINE__); might_resched(); } while (0)
 #else