sched/wait, fs/fscache: Convert wait_on_atomic_t() usage to the new wait_var_event() API

The old wait_on_atomic_t() is going to get removed, use the more
flexible wait_var_event() API instead.

No change in functionality.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2 files changed, 5 insertions, 4 deletions

diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c
index ff84258132bb..d705125665f0 100644
--- a/fs/fscache/cookie.c
+++ b/fs/fscache/cookie.c
@@ -557,9 +557,10 @@ void __fscache_disable_cookie(struct fscache_cookie *cookie, bool invalidate)
          * n_active reaches 0).  This makes sure outstanding reads and writes
          * have completed.
          */
-        if (!atomic_dec_and_test(&cookie->n_active))
-                wait_on_atomic_t(&cookie->n_active, atomic_t_wait,
-                                 TASK_UNINTERRUPTIBLE);
+        if (!atomic_dec_and_test(&cookie->n_active)) {
+                wait_var_event(&cookie->n_active,
+                               !atomic_read(&cookie->n_active));
+        }
 
         /* Make sure any pending writes are cancelled. */
         if (cookie->def->type != FSCACHE_COOKIE_TYPE_INDEX)
diff --git a/include/linux/fscache-cache.h b/include/linux/fscache-cache.h
index 4c467ef50159..3b03e29e2f1a 100644
--- a/include/linux/fscache-cache.h
+++ b/include/linux/fscache-cache.h
@@ -496,7 +496,7 @@ static inline bool __fscache_unuse_cookie(struct fscache_cookie *cookie)
 
 static inline void __fscache_wake_unused_cookie(struct fscache_cookie *cookie)
 {
-        wake_up_atomic_t(&cookie->n_active);
+        wake_up_var(&cookie->n_active);
 }
 
 /**