Merge branch 'sched-wait-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull wait_var_event updates from Ingo Molnar:
 "This introduces the new wait_var_event() API, which is a more flexible
  waiting primitive than wait_on_atomic_t().

  All wait_on_atomic_t() users are migrated over to the new API and
  wait_on_atomic_t() is removed. The migration fixes one bug and should
  result in no functional changes for the other usecases"

* 'sched-wait-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/wait: Improve __var_waitqueue() code generation
  sched/wait: Remove the wait_on_atomic_t() API
  sched/wait, arch/mips: Fix and convert wait_on_atomic_t() usage to the new wait_var_event() API
  sched/wait, fs/ocfs2: Convert wait_on_atomic_t() usage to the new wait_var_event() API
  sched/wait, fs/nfs: Convert wait_on_atomic_t() usage to the new wait_var_event() API
  sched/wait, fs/fscache: Convert wait_on_atomic_t() usage to the new wait_var_event() API
  sched/wait, fs/btrfs: Convert wait_on_atomic_t() usage to the new wait_var_event() API
  sched/wait, fs/afs: Convert wait_on_atomic_t() usage to the new wait_var_event() API
  sched/wait, drivers/media: Convert wait_on_atomic_t() usage to the new wait_var_event() API
  sched/wait, drivers/drm: Convert wait_on_atomic_t() usage to the new wait_var_event() API
  sched/wait: Introduce wait_var_event()

2 files changed, 4 insertions, 2 deletions

diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index 57028d49c202..b9e9bf628849 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -781,6 +781,8 @@ int mips_set_process_fp_mode(struct task_struct *task, unsigned int value)
         atomic_set(&task->mm->context.fp_mode_switching, 0);
         preempt_enable();
 
+        wake_up_var(&task->mm->context.fp_mode_switching);
+
         return 0;
 }
 
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 0ae4a731cc12..967e9e4e795e 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1248,8 +1248,8 @@ static int enable_restore_fp_context(int msa)
          * If an FP mode switch is currently underway, wait for it to
          * complete before proceeding.
          */
-        wait_on_atomic_t(&current->mm->context.fp_mode_switching,
-                         atomic_t_wait, TASK_KILLABLE);
+        wait_var_event(&current->mm->context.fp_mode_switching,
+                       !atomic_read(&current->mm->context.fp_mode_switching));
 
         if (!used_math()) {
                 /* First time FP context user. */