This removes superflous freezer calls as they are no longer needed
as the VFS now performs filesystem freezing/thaw if the filesystem has
support for it.

The following Coccinelle rule was used as follows:

spatch --sp-file fs-freeze-cleanup.cocci --in-place fs/$FS/

@ has_freeze_fs @
identifier super_ops;
expression freeze_op;
@@

struct super_operations super_ops = {
        .freeze_fs = freeze_op,
};

@ remove_set_freezable depends on has_freeze_fs @
expression time;
statement S, S2, S3;
expression task;
@@

(
-       set_freezable();
|
-       if (try_to_freeze())
-               continue;
|
-       try_to_freeze();
|
-       freezable_schedule();
+       schedule();
|
-       freezable_schedule_timeout(time);
+       schedule_timeout(time);
|
-       if (freezing(task)) { S }
|
-       if (freezing(task)) { S }
-       else
        { S2 }
|
-       freezing(current)
)

Generated-by: Coccinelle SmPL
Signed-off-by: Luis R. Rodriguez <[email protected]>
---
 fs/xfs/xfs_trans_ail.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c
index cef89f7127d3..1f3dd10a9d00 100644
--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@ -513,7 +513,6 @@ xfsaild(
        long            tout = 0;       /* milliseconds */
 
        current->flags |= PF_MEMALLOC;
-       set_freezable();
 
        while (1) {
                if (tout && tout <= 20)
@@ -551,19 +550,17 @@ xfsaild(
                if (!xfs_ail_min(ailp) &&
                    ailp->xa_target == ailp->xa_target_prev) {
                        spin_unlock(&ailp->xa_lock);
-                       freezable_schedule();
+                       schedule();
                        tout = 0;
                        continue;
                }
                spin_unlock(&ailp->xa_lock);
 
                if (tout)
-                       freezable_schedule_timeout(msecs_to_jiffies(tout));
+                       schedule_timeout(msecs_to_jiffies(tout));
 
                __set_current_state(TASK_RUNNING);
 
-               try_to_freeze();
-
                tout = xfsaild_push(ailp);
        }
 
-- 
2.15.0

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