Merge branch 'work.poll2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull more poll annotation updates from Al Viro:
 "This is preparation to solving the problems you've mentioned in the
  original poll series.

  After this series, the kernel is ready for running

      for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
            L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
            for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
      done

  as a for bulk search-and-replace.

  After that, the kernel is ready to apply the patch to unify
  {de,}mangle_poll(), and then get rid of kernel-side POLL... uses
  entirely, and we should be all done with that stuff.

  Basically, that's what you suggested wrt KPOLL..., except that we can
  use EPOLL... instead - they already are arch-independent (and equal to
  what is currently kernel-side POLL...).

  After the preparations (in this series) switch to returning EPOLL...
  from ->poll() instances is completely mechanical and kernel-side
  POLL... can go away. The last step (killing kernel-side POLL... and
  unifying {de,}mangle_poll() has to be done after the
  search-and-replace job, since we need userland-side POLL... for
  unified {de,}mangle_poll(), thus the cherry-pick at the last step.

  After that we will have:

   - POLL{IN,OUT,...} *not* in __poll_t, so any stray instances of
     ->poll() still using those will be caught by sparse.

   - eventpoll.c and select.c warning-free wrt __poll_t

   - no more kernel-side definitions of POLL... - userland ones are
     visible through the entire kernel (and used pretty much only for
     mangle/demangle)

   - same behavior as after the first series (i.e. sparc et.al. epoll(2)
     working correctly)"

* 'work.poll2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  annotate ep_scan_ready_list()
  ep_send_events_proc(): return result via esed->res
  preparation to switching ->poll() to returning EPOLL...
  add EPOLLNVAL, annotate EPOLL... and event_poll->event
  use linux/poll.h instead of asm/poll.h
  xen: fix poll misannotation
  smc: missing poll annotations

2 files changed, 19 insertions, 17 deletions

diff --git a/include/linux/poll.h b/include/linux/poll.h
index 04781a753326..d23104b32931 100644
--- a/include/linux/poll.h
+++ b/include/linux/poll.h
@@ -11,6 +11,7 @@
 #include <linux/sysctl.h>
 #include <linux/uaccess.h>
 #include <uapi/linux/poll.h>
+#include <uapi/linux/eventpoll.h>
 
 extern struct ctl_table epoll_table[]; /* for sysctl */
 /* ~832 bytes of stack space used max in sys_select/sys_poll before allocating
@@ -22,7 +23,7 @@ extern struct ctl_table epoll_table[]; /* for sysctl */
 #define WQUEUES_STACK_ALLOC     (MAX_STACK_ALLOC - FRONTEND_STACK_ALLOC)
 #define N_INLINE_POLL_ENTRIES   (WQUEUES_STACK_ALLOC / sizeof(struct poll_table_entry))
 
-#define DEFAULT_POLLMASK (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)
+#define DEFAULT_POLLMASK (EPOLLIN | EPOLLOUT | EPOLLRDNORM | EPOLLWRNORM)
 
 struct poll_table_struct;
 
diff --git a/include/uapi/linux/eventpoll.h b/include/uapi/linux/eventpoll.h
index 63e21be30f15..bf48e71f2634 100644
--- a/include/uapi/linux/eventpoll.h
+++ b/include/uapi/linux/eventpoll.h
@@ -28,20 +28,21 @@
 #define EPOLL_CTL_MOD 3
 
 /* Epoll event masks */
-#define EPOLLIN         0x00000001
-#define EPOLLPRI        0x00000002
-#define EPOLLOUT        0x00000004
-#define EPOLLERR        0x00000008
-#define EPOLLHUP        0x00000010
-#define EPOLLRDNORM     0x00000040
-#define EPOLLRDBAND     0x00000080
-#define EPOLLWRNORM     0x00000100
-#define EPOLLWRBAND     0x00000200
-#define EPOLLMSG        0x00000400
-#define EPOLLRDHUP      0x00002000
+#define EPOLLIN         (__force __poll_t)0x00000001
+#define EPOLLPRI        (__force __poll_t)0x00000002
+#define EPOLLOUT        (__force __poll_t)0x00000004
+#define EPOLLERR        (__force __poll_t)0x00000008
+#define EPOLLHUP        (__force __poll_t)0x00000010
+#define EPOLLNVAL       (__force __poll_t)0x00000020
+#define EPOLLRDNORM     (__force __poll_t)0x00000040
+#define EPOLLRDBAND     (__force __poll_t)0x00000080
+#define EPOLLWRNORM     (__force __poll_t)0x00000100
+#define EPOLLWRBAND     (__force __poll_t)0x00000200
+#define EPOLLMSG        (__force __poll_t)0x00000400
+#define EPOLLRDHUP      (__force __poll_t)0x00002000
 
 /* Set exclusive wakeup mode for the target file descriptor */
-#define EPOLLEXCLUSIVE (1U << 28)
+#define EPOLLEXCLUSIVE (__force __poll_t)(1U << 28)
 
 /*
  * Request the handling of system wakeup events so as to prevent system suspends
@@ -53,13 +54,13 @@
  *
  * Requires CAP_BLOCK_SUSPEND
  */
-#define EPOLLWAKEUP (1U << 29)
+#define EPOLLWAKEUP (__force __poll_t)(1U << 29)
 
 /* Set the One Shot behaviour for the target file descriptor */
-#define EPOLLONESHOT (1U << 30)
+#define EPOLLONESHOT (__force __poll_t)(1U << 30)
 
 /* Set the Edge Triggered behaviour for the target file descriptor */
-#define EPOLLET (1U << 31)
+#define EPOLLET (__force __poll_t)(1U << 31)
 
 /* 
  * On x86-64 make the 64bit structure have the same alignment as the
@@ -74,7 +75,7 @@
 #endif
 
 struct epoll_event {
-        __u32 events;
+        __poll_t events;
         __u64 data;
 } EPOLL_PACKED;