[PATCH] delay accounting: temporarily enable by default

Enable delay accounting by default so that feature gets coverage testing
without requiring special measures.

Earlier, it was off by default and had to be enabled via a boot time param.
 This patch reverses the default behaviour to improve coverage testing.  It
can be removed late in the kernel development cycle if its believed users
shouldn't have to incur any cost if they don't want delay accounting.  Or
it can be retained forever if the utility of the stats is deemed common
enough to warrant keeping the feature on.

Signed-off-by: Shailabh Nagar <nagar@watson.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/delayacct.h b/include/linux/delayacct.h
index 8a284cc6fd5f..11487b6e7127 100644
--- a/include/linux/delayacct.h
+++ b/include/linux/delayacct.h
@@ -55,7 +55,7 @@ static inline void delayacct_tsk_init(struct task_struct *tsk)
 {
         /* reinitialize in case parent's non-null pointer was dup'ed*/
         tsk->delays = NULL;
-        if (unlikely(delayacct_on))
+        if (delayacct_on)
                 __delayacct_tsk_init(tsk);
 }
 
@@ -80,7 +80,7 @@ static inline void delayacct_blkio_end(void)
 static inline int delayacct_add_tsk(struct taskstats *d,
                                         struct task_struct *tsk)
 {
-        if (likely(!delayacct_on) || !tsk->delays)
+        if (!delayacct_on || !tsk->delays)
                 return 0;
         return __delayacct_add_tsk(d, tsk);
 }