Merge branch 'task_killable' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc

* 'task_killable' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc: (22 commits)
  Remove commented-out code copied from NFS
  NFS: Switch from intr mount option to TASK_KILLABLE
  Add wait_for_completion_killable
  Add wait_event_killable
  Add schedule_timeout_killable
  Use mutex_lock_killable in vfs_readdir
  Add mutex_lock_killable
  Use lock_page_killable
  Add lock_page_killable
  Add fatal_signal_pending
  Add TASK_WAKEKILL
  exit: Use task_is_*
  signal: Use task_is_*
  sched: Use task_contributes_to_load, TASK_ALL and TASK_NORMAL
  ptrace: Use task_is_*
  power: Use task_is_*
  wait: Use TASK_NORMAL
  proc/base.c: Use task_is_*
  proc/array.c: Use TASK_REPORT
  perfmon: Use task_is_*
  ...

Fixed up conflicts in NFS/sunrpc manually..

9 files changed, 102 insertions, 23 deletions

diff --git a/include/linux/completion.h b/include/linux/completion.h
index 33d6aaf94447..d2961b66d53d 100644
--- a/include/linux/completion.h
+++ b/include/linux/completion.h
@@ -44,6 +44,7 @@ static inline void init_completion(struct completion *x)
 
 extern void wait_for_completion(struct completion *);
 extern int wait_for_completion_interruptible(struct completion *x);
+extern int wait_for_completion_killable(struct completion *x);
 extern unsigned long wait_for_completion_timeout(struct completion *x,
 						   unsigned long timeout);
 extern unsigned long wait_for_completion_interruptible_timeout(
diff --git a/include/linux/mutex.h b/include/linux/mutex.h
index 601479772b98..05c590352dd7 100644
--- a/include/linux/mutex.h
+++ b/include/linux/mutex.h
@@ -125,15 +125,20 @@ static inline int fastcall mutex_is_locked(struct mutex *lock)
 extern void mutex_lock_nested(struct mutex *lock, unsigned int subclass);
 extern int __must_check mutex_lock_interruptible_nested(struct mutex *lock,
 					unsigned int subclass);
+extern int __must_check mutex_lock_killable_nested(struct mutex *lock,
+					unsigned int subclass);
 
 #define mutex_lock(lock) mutex_lock_nested(lock, 0)
 #define mutex_lock_interruptible(lock) mutex_lock_interruptible_nested(lock, 0)
+#define mutex_lock_killable(lock) mutex_lock_killable_nested(lock, 0)
 #else
 extern void fastcall mutex_lock(struct mutex *lock);
 extern int __must_check fastcall mutex_lock_interruptible(struct mutex *lock);
+extern int __must_check fastcall mutex_lock_killable(struct mutex *lock);
 
 # define mutex_lock_nested(lock, subclass) mutex_lock(lock)
 # define mutex_lock_interruptible_nested(lock, subclass) mutex_lock_interruptible(lock)
+# define mutex_lock_killable_nested(lock, subclass) mutex_lock_killable(lock)
 #endif
 
 /*
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 099ddb4481c0..a69ba80f2dfe 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -556,14 +556,7 @@ extern void * nfs_root_data(void);
 
 #define nfs_wait_event(clnt, wq, condition)				\
 ({									\
-	int __retval = 0;						\
-	if (clnt->cl_intr) {						\
-		sigset_t oldmask;					\
-		rpc_clnt_sigmask(clnt, &oldmask);			\
-		__retval = wait_event_interruptible(wq, condition);	\
-		rpc_clnt_sigunmask(clnt, &oldmask);			\
-	} else								\
-		wait_event(wq, condition);				\
+	int __retval = wait_event_killable(wq, condition);		\
 	__retval;							\
 })
 
diff --git a/include/linux/nfs_mount.h b/include/linux/nfs_mount.h
index a3ade89a64d2..df7c6b7a7ebb 100644
--- a/include/linux/nfs_mount.h
+++ b/include/linux/nfs_mount.h
@@ -48,7 +48,7 @@ struct nfs_mount_data {
 /* bits in the flags field */
 
 #define NFS_MOUNT_SOFT		0x0001	/* 1 */
-#define NFS_MOUNT_INTR		0x0002	/* 1 */
+#define NFS_MOUNT_INTR		0x0002	/* 1 */ /* now unused, but ABI */
 #define NFS_MOUNT_SECURE	0x0004	/* 1 */
 #define NFS_MOUNT_POSIX		0x0008	/* 1 */
 #define NFS_MOUNT_NOCTO		0x0010	/* 1 */
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index db8a410ae9e1..4b62a105622b 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -157,6 +157,7 @@ static inline pgoff_t linear_page_index(struct vm_area_struct *vma,
 }
 
 extern void FASTCALL(__lock_page(struct page *page));
+extern int FASTCALL(__lock_page_killable(struct page *page));
 extern void FASTCALL(__lock_page_nosync(struct page *page));
 extern void FASTCALL(unlock_page(struct page *page));
 
@@ -171,6 +172,19 @@ static inline void lock_page(struct page *page)
 }
 
 /*
+ * lock_page_killable is like lock_page but can be interrupted by fatal
+ * signals.  It returns 0 if it locked the page and -EINTR if it was
+ * killed while waiting.
+ */
+static inline int lock_page_killable(struct page *page)
+{
+	might_sleep();
+	if (TestSetPageLocked(page))
+		return __lock_page_killable(page);
+	return 0;
+}
+
+/*
  * lock_page_nosync should only be used if we can't pin the page's inode.
  * Doesn't play quite so well with block device plugging.
  */
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 9d4797609aa5..6c333579d9da 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -172,13 +172,35 @@ print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
 #define TASK_RUNNING		0
 #define TASK_INTERRUPTIBLE	1
 #define TASK_UNINTERRUPTIBLE	2
-#define TASK_STOPPED		4
-#define TASK_TRACED		8
+#define __TASK_STOPPED		4
+#define __TASK_TRACED		8
 /* in tsk->exit_state */
 #define EXIT_ZOMBIE		16
 #define EXIT_DEAD		32
 /* in tsk->state again */
 #define TASK_DEAD		64
+#define TASK_WAKEKILL		128
+
+/* Convenience macros for the sake of set_task_state */
+#define TASK_KILLABLE		(TASK_WAKEKILL | TASK_UNINTERRUPTIBLE)
+#define TASK_STOPPED		(TASK_WAKEKILL | __TASK_STOPPED)
+#define TASK_TRACED		(TASK_WAKEKILL | __TASK_TRACED)
+
+/* Convenience macros for the sake of wake_up */
+#define TASK_NORMAL		(TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE)
+#define TASK_ALL		(TASK_NORMAL | __TASK_STOPPED | __TASK_TRACED)
+
+/* get_task_state() */
+#define TASK_REPORT		(TASK_RUNNING | TASK_INTERRUPTIBLE | \
+				 TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \
+				 __TASK_TRACED)
+
+#define task_is_traced(task)	((task->state & __TASK_TRACED) != 0)
+#define task_is_stopped(task)	((task->state & __TASK_STOPPED) != 0)
+#define task_is_stopped_or_traced(task)	\
+			((task->state & (__TASK_STOPPED | __TASK_TRACED)) != 0)
+#define task_contributes_to_load(task)	\
+				((task->state & TASK_UNINTERRUPTIBLE) != 0)
 
 #define __set_task_state(tsk, state_value)		\
 	do { (tsk)->state = (state_value); } while (0)
@@ -302,6 +324,7 @@ extern int in_sched_functions(unsigned long addr);
 #define	MAX_SCHEDULE_TIMEOUT	LONG_MAX
 extern signed long FASTCALL(schedule_timeout(signed long timeout));
 extern signed long schedule_timeout_interruptible(signed long timeout);
+extern signed long schedule_timeout_killable(signed long timeout);
 extern signed long schedule_timeout_uninterruptible(signed long timeout);
 asmlinkage void schedule(void);
 
@@ -1892,7 +1915,14 @@ static inline int signal_pending(struct task_struct *p)
 {
 	return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING));
 }
-  
+
+extern int FASTCALL(__fatal_signal_pending(struct task_struct *p));
+
+static inline int fatal_signal_pending(struct task_struct *p)
+{
+	return signal_pending(p) && __fatal_signal_pending(p);
+}
+
 static inline int need_resched(void)
 {
 	return unlikely(test_thread_flag(TIF_NEED_RESCHED));
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index 3e9addc741c1..129a86e25d29 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -41,7 +41,6 @@ struct rpc_clnt {
 	struct rpc_iostats *	cl_metrics;	/* per-client statistics */
 
 	unsigned int		cl_softrtry : 1,/* soft timeouts */
-				cl_intr     : 1,/* interruptible */
 				cl_discrtry : 1,/* disconnect before retry */
 				cl_autobind : 1;/* use getport() */
 
@@ -111,7 +110,6 @@ struct rpc_create_args {
 
 /* Values for "flags" field */
 #define RPC_CLNT_CREATE_HARDRTRY	(1UL << 0)
-#define RPC_CLNT_CREATE_INTR		(1UL << 1)
 #define RPC_CLNT_CREATE_AUTOBIND	(1UL << 2)
 #define RPC_CLNT_CREATE_NONPRIVPORT	(1UL << 3)
 #define RPC_CLNT_CREATE_NOPING		(1UL << 4)
@@ -137,8 +135,6 @@ int		rpc_call_sync(struct rpc_clnt *clnt, struct rpc_message *msg,
 struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred,
 			       int flags);
 void		rpc_restart_call(struct rpc_task *);
-void		rpc_clnt_sigmask(struct rpc_clnt *clnt, sigset_t *oldset);
-void		rpc_clnt_sigunmask(struct rpc_clnt *clnt, sigset_t *oldset);
 void		rpc_setbufsize(struct rpc_clnt *, unsigned int, unsigned int);
 size_t		rpc_max_payload(struct rpc_clnt *);
 void		rpc_force_rebind(struct rpc_clnt *);
diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h
index ce3d1b132729..f689f02e6793 100644
--- a/include/linux/sunrpc/sched.h
+++ b/include/linux/sunrpc/sched.h
@@ -137,7 +137,6 @@ struct rpc_task_setup {
 #define RPC_TASK_DYNAMIC	0x0080		/* task was kmalloc'ed */
 #define RPC_TASK_KILLED		0x0100		/* task was killed */
 #define RPC_TASK_SOFT		0x0200		/* Use soft timeouts */
-#define RPC_TASK_NOINTR		0x0400		/* uninterruptible task */
 
 #define RPC_IS_ASYNC(t)		((t)->tk_flags & RPC_TASK_ASYNC)
 #define RPC_IS_SWAPPER(t)	((t)->tk_flags & RPC_TASK_SWAPPER)
@@ -145,7 +144,6 @@ struct rpc_task_setup {
 #define RPC_ASSASSINATED(t)	((t)->tk_flags & RPC_TASK_KILLED)
 #define RPC_DO_CALLBACK(t)	((t)->tk_callback != NULL)
 #define RPC_IS_SOFT(t)		((t)->tk_flags & RPC_TASK_SOFT)
-#define RPC_TASK_UNINTERRUPTIBLE(t) ((t)->tk_flags & RPC_TASK_NOINTR)
 
 #define RPC_TASK_RUNNING	0
 #define RPC_TASK_QUEUED		1
diff --git a/include/linux/wait.h b/include/linux/wait.h
index 0e686280450b..1f4fb0a81ecd 100644
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -152,14 +152,15 @@ int FASTCALL(out_of_line_wait_on_bit(void *, int, int (*)(void *), unsigned));
 int FASTCALL(out_of_line_wait_on_bit_lock(void *, int, int (*)(void *), unsigned));
 wait_queue_head_t *FASTCALL(bit_waitqueue(void *, int));
 
-#define wake_up(x)			__wake_up(x, TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, 1, NULL)
-#define wake_up_nr(x, nr)		__wake_up(x, TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, nr, NULL)
-#define wake_up_all(x)			__wake_up(x, TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, 0, NULL)
+#define wake_up(x)			__wake_up(x, TASK_NORMAL, 1, NULL)
+#define wake_up_nr(x, nr)		__wake_up(x, TASK_NORMAL, nr, NULL)
+#define wake_up_all(x)			__wake_up(x, TASK_NORMAL, 0, NULL)
+#define wake_up_locked(x)		__wake_up_locked((x), TASK_NORMAL)
+
 #define wake_up_interruptible(x)	__wake_up(x, TASK_INTERRUPTIBLE, 1, NULL)
 #define wake_up_interruptible_nr(x, nr)	__wake_up(x, TASK_INTERRUPTIBLE, nr, NULL)
 #define wake_up_interruptible_all(x)	__wake_up(x, TASK_INTERRUPTIBLE, 0, NULL)
-#define	wake_up_locked(x)		__wake_up_locked((x), TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE)
-#define wake_up_interruptible_sync(x)   __wake_up_sync((x),TASK_INTERRUPTIBLE, 1)
+#define wake_up_interruptible_sync(x)	__wake_up_sync((x), TASK_INTERRUPTIBLE, 1)
 
 #define __wait_event(wq, condition) 					\
 do {									\
@@ -345,6 +346,47 @@ do {									\
 	__ret;								\
 })
 
+#define __wait_event_killable(wq, condition, ret)			\
+do {									\
+	DEFINE_WAIT(__wait);						\
+									\
+	for (;;) {							\
+		prepare_to_wait(&wq, &__wait, TASK_KILLABLE);		\
+		if (condition)						\
+			break;						\
+		if (!fatal_signal_pending(current)) {			\
+			schedule();					\
+			continue;					\
+		}							\
+		ret = -ERESTARTSYS;					\
+		break;							\
+	}								\
+	finish_wait(&wq, &__wait);					\
+} while (0)
+
+/**
+ * wait_event_killable - sleep until a condition gets true
+ * @wq: the waitqueue to wait on
+ * @condition: a C expression for the event to wait for
+ *
+ * The process is put to sleep (TASK_KILLABLE) until the
+ * @condition evaluates to true or a signal is received.
+ * The @condition is checked each time the waitqueue @wq is woken up.
+ *
+ * wake_up() has to be called after changing any variable that could
+ * change the result of the wait condition.
+ *
+ * The function will return -ERESTARTSYS if it was interrupted by a
+ * signal and 0 if @condition evaluated to true.
+ */
+#define wait_event_killable(wq, condition)				\
+({									\
+	int __ret = 0;							\
+	if (!(condition))						\
+		__wait_event_killable(wq, condition, __ret);		\
+	__ret;								\
+})
+
 /*
  * Must be called with the spinlock in the wait_queue_head_t held.
  */