Merge branch 'misc.poll' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull poll annotations from Al Viro:
 "This introduces a __bitwise type for POLL### bitmap, and propagates
  the annotations through the tree. Most of that stuff is as simple as
  'make ->poll() instances return __poll_t and do the same to local
  variables used to hold the future return value'.

  Some of the obvious brainos found in process are fixed (e.g. POLLIN
  misspelled as POLL_IN). At that point the amount of sparse warnings is
  low and most of them are for genuine bugs - e.g. ->poll() instance
  deciding to return -EINVAL instead of a bitmap. I hadn't touched those
  in this series - it's large enough as it is.

  Another problem it has caught was eventpoll() ABI mess; select.c and
  eventpoll.c assumed that corresponding POLL### and EPOLL### were
  equal. That's true for some, but not all of them - EPOLL### are
  arch-independent, but POLL### are not.

  The last commit in this series separates userland POLL### values from
  the (now arch-independent) kernel-side ones, converting between them
  in the few places where they are copied to/from userland. AFAICS, this
  is the least disruptive fix preserving poll(2) ABI and making epoll()
  work on all architectures.

  As it is, it's simply broken on sparc - try to give it EPOLLWRNORM and
  it will trigger only on what would've triggered EPOLLWRBAND on other
  architectures. EPOLLWRBAND and EPOLLRDHUP, OTOH, are never triggered
  at all on sparc. With this patch they should work consistently on all
  architectures"

* 'misc.poll' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (37 commits)
  make kernel-side POLL... arch-independent
  eventpoll: no need to mask the result of epi_item_poll() again
  eventpoll: constify struct epoll_event pointers
  debugging printk in sg_poll() uses %x to print POLL... bitmap
  annotate poll(2) guts
  9p: untangle ->poll() mess
  ->si_band gets POLL... bitmap stored into a user-visible long field
  ring_buffer_poll_wait() return value used as return value of ->poll()
  the rest of drivers/*: annotate ->poll() instances
  media: annotate ->poll() instances
  fs: annotate ->poll() instances
  ipc, kernel, mm: annotate ->poll() instances
  net: annotate ->poll() instances
  apparmor: annotate ->poll() instances
  tomoyo: annotate ->poll() instances
  sound: annotate ->poll() instances
  acpi: annotate ->poll() instances
  crypto: annotate ->poll() instances
  block: annotate ->poll() instances
  x86: annotate ->poll() instances
  ...

8 files changed, 12 insertions, 12 deletions

diff --git a/drivers/net/ieee802154/ca8210.c b/drivers/net/ieee802154/ca8210.c
index 7900ed066d8a..e412dfdda7dd 100644
--- a/drivers/net/ieee802154/ca8210.c
+++ b/drivers/net/ieee802154/ca8210.c
@@ -2638,12 +2638,12 @@ static long ca8210_test_int_ioctl(
  *
  * Return: set of poll return flags
  */
-static unsigned int ca8210_test_int_poll(
+static __poll_t ca8210_test_int_poll(
 	struct file *filp,
 	struct poll_table_struct *ptable
 )
 {
-	unsigned int return_flags = 0;
+	__poll_t return_flags = 0;
 	struct ca8210_priv *priv = filp->private_data;
 
 	poll_wait(filp, &priv->test.readq, ptable);
diff --git a/drivers/net/ppp/ppp_async.c b/drivers/net/ppp/ppp_async.c
index 1b28e6e702f5..bdc4d23627c5 100644
--- a/drivers/net/ppp/ppp_async.c
+++ b/drivers/net/ppp/ppp_async.c
@@ -334,7 +334,7 @@ ppp_asynctty_ioctl(struct tty_struct *tty, struct file *file,
 }
 
 /* No kernel lock - fine */
-static unsigned int
+static __poll_t
 ppp_asynctty_poll(struct tty_struct *tty, struct file *file, poll_table *wait)
 {
 	return 0;
diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c
index 264d4af0bf69..ef6b2126b23a 100644
--- a/drivers/net/ppp/ppp_generic.c
+++ b/drivers/net/ppp/ppp_generic.c
@@ -531,10 +531,10 @@ static ssize_t ppp_write(struct file *file, const char __user *buf,
 }
 
 /* No kernel lock - fine */
-static unsigned int ppp_poll(struct file *file, poll_table *wait)
+static __poll_t ppp_poll(struct file *file, poll_table *wait)
 {
 	struct ppp_file *pf = file->private_data;
-	unsigned int mask;
+	__poll_t mask;
 
 	if (!pf)
 		return 0;
diff --git a/drivers/net/ppp/ppp_synctty.c b/drivers/net/ppp/ppp_synctty.c
index 7196f00f0991..047f6c68a441 100644
--- a/drivers/net/ppp/ppp_synctty.c
+++ b/drivers/net/ppp/ppp_synctty.c
@@ -327,7 +327,7 @@ ppp_synctty_ioctl(struct tty_struct *tty, struct file *file,
 }
 
 /* No kernel lock - fine */
-static unsigned int
+static __poll_t
 ppp_sync_poll(struct tty_struct *tty, struct file *file, poll_table *wait)
 {
 	return 0;
diff --git a/drivers/net/tap.c b/drivers/net/tap.c
index 0a886fda0129..f39c6f876e67 100644
--- a/drivers/net/tap.c
+++ b/drivers/net/tap.c
@@ -572,10 +572,10 @@ static int tap_release(struct inode *inode, struct file *file)
 	return 0;
 }
 
-static unsigned int tap_poll(struct file *file, poll_table *wait)
+static __poll_t tap_poll(struct file *file, poll_table *wait)
 {
 	struct tap_queue *q = file->private_data;
-	unsigned int mask = POLLERR;
+	__poll_t mask = POLLERR;
 
 	if (!q)
 		goto out;
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index a8ec589d1359..7548d8a11bdf 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1257,12 +1257,12 @@ static void tun_net_init(struct net_device *dev)
 /* Character device part */
 
 /* Poll */
-static unsigned int tun_chr_poll(struct file *file, poll_table *wait)
+static __poll_t tun_chr_poll(struct file *file, poll_table *wait)
 {
 	struct tun_file *tfile = file->private_data;
 	struct tun_struct *tun = tun_get(tfile);
 	struct sock *sk;
-	unsigned int mask = 0;
+	__poll_t mask = 0;
 
 	if (!tun)
 		return POLLERR;
diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c
index 6ea16260ec76..f6b000ddcd15 100644
--- a/drivers/net/wan/cosa.c
+++ b/drivers/net/wan/cosa.c
@@ -924,7 +924,7 @@ static int chrdev_tx_done(struct channel_data *chan, int size)
 	return 1;
 }
 
-static unsigned int cosa_poll(struct file *file, poll_table *poll)
+static __poll_t cosa_poll(struct file *file, poll_table *poll)
 {
 	pr_info("cosa_poll is here\n");
 	return 0;
diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00debug.c b/drivers/net/wireless/ralink/rt2x00/rt2x00debug.c
index f4fdad2ed319..72c55d1f8903 100644
--- a/drivers/net/wireless/ralink/rt2x00/rt2x00debug.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00debug.c
@@ -301,7 +301,7 @@ exit:
 	return status;
 }
 
-static unsigned int rt2x00debug_poll_queue_dump(struct file *file,
+static __poll_t rt2x00debug_poll_queue_dump(struct file *file,
 						poll_table *wait)
 {
 	struct rt2x00debug_intf *intf = file->private_data;