workqueue: deprecate flush[_delayed]_work_sync()

flush[_delayed]_work_sync() are now spurious.  Mark them deprecated
and convert all users to flush[_delayed]_work().

If you're cc'd and wondering what's going on: Now all workqueues are
non-reentrant and the regular flushes guarantee that the work item is
not pending or running on any CPU on return, so there's no reason to
use the sync flushes at all and they're going away.

This patch doesn't make any functional difference.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Mattia Dongili <malattia@linux.it>
Cc: Kent Yoder <key@linux.vnet.ibm.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: Bryan Wu <bryan.wu@canonical.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-wireless@vger.kernel.org
Cc: Anton Vorontsov <cbou@mail.ru>
Cc: Sangbeom Kim <sbkim73@samsung.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Petr Vandrovec <petr@vandrovec.name>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Avi Kivity <avi@redhat.com> 

2 files changed, 3 insertions, 3 deletions

diff --git a/drivers/char/sonypi.c b/drivers/char/sonypi.c
index f87780502b41..320debbe32fa 100644
--- a/drivers/char/sonypi.c
+++ b/drivers/char/sonypi.c
@@ -1433,7 +1433,7 @@ static int __devexit sonypi_remove(struct platform_device *dev)
         sonypi_disable();
 
         synchronize_irq(sonypi_device.irq);
-        flush_work_sync(&sonypi_device.input_work);
+        flush_work(&sonypi_device.input_work);
 
         if (useinput) {
                 input_unregister_device(sonypi_device.input_key_dev);
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index 817f0ee202b6..3af9f4d1a23f 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -1172,7 +1172,7 @@ int tpm_release(struct inode *inode, struct file *file)
         struct tpm_chip *chip = file->private_data;
 
         del_singleshot_timer_sync(&chip->user_read_timer);
-        flush_work_sync(&chip->work);
+        flush_work(&chip->work);
         file->private_data = NULL;
         atomic_set(&chip->data_pending, 0);
         kfree(chip->data_buffer);
@@ -1225,7 +1225,7 @@ ssize_t tpm_read(struct file *file, char __user *buf,
         int rc;
 
         del_singleshot_timer_sync(&chip->user_read_timer);
-        flush_work_sync(&chip->work);
+        flush_work(&chip->work);
         ret_size = atomic_read(&chip->data_pending);
         atomic_set(&chip->data_pending, 0);
         if (ret_size > 0) {     /* relay data */