[PATCH] sched: cleanup, remove task_t, convert to struct task_struct

cleanup: remove task_t and convert all the uses to struct task_struct. I
introduced it for the scheduler anno and it was a mistake.

Conversion was mostly scripted, the result was reviewed and all
secondary whitespace and style impact (if any) was fixed up by hand.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

25 files changed, 203 insertions, 187 deletions

diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 01c8c8b2333..41ebf51a107 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -474,7 +474,7 @@ out:
  */
 
 unsigned long
-thread_saved_pc(task_t *t)
+thread_saved_pc(struct task_struct *t)
 {
 	unsigned long base = (unsigned long)task_stack_page(t);
 	unsigned long fp, sp = task_thread_info(t)->pcb.ksp;
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index eb8e8dc5ac8..2fbe4536fe1 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -678,7 +678,7 @@ copy_reg(const u64 *fr, u64 fnat, u64 *tr, u64 *tnat)
  */
 
 static void
-ia64_mca_modify_comm(const task_t *previous_current)
+ia64_mca_modify_comm(const struct task_struct *previous_current)
 {
 	char *p, comm[sizeof(current->comm)];
 	if (previous_current->pid)
@@ -709,7 +709,7 @@ ia64_mca_modify_comm(const task_t *previous_current)
  * that we can do backtrace on the MCA/INIT handler code itself.
  */
 
-static task_t *
+static struct task_struct *
 ia64_mca_modify_original_stack(struct pt_regs *regs,
 		const struct switch_stack *sw,
 		struct ia64_sal_os_state *sos,
@@ -719,7 +719,7 @@ ia64_mca_modify_original_stack(struct pt_regs *regs,
 	ia64_va va;
 	extern char ia64_leave_kernel[];	/* Need asm address, not function descriptor */
 	const pal_min_state_area_t *ms = sos->pal_min_state;
-	task_t *previous_current;
+	struct task_struct *previous_current;
 	struct pt_regs *old_regs;
 	struct switch_stack *old_sw;
 	unsigned size = sizeof(struct pt_regs) +
@@ -1023,7 +1023,7 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
 	pal_processor_state_info_t *psp = (pal_processor_state_info_t *)
 		&sos->proc_state_param;
 	int recover, cpu = smp_processor_id();
-	task_t *previous_current;
+	struct task_struct *previous_current;
 	struct ia64_mca_notify_die nd =
 		{ .sos = sos, .monarch_cpu = &monarch_cpu };
 
@@ -1352,7 +1352,7 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
 {
 	static atomic_t slaves;
 	static atomic_t monarchs;
-	task_t *previous_current;
+	struct task_struct *previous_current;
 	int cpu = smp_processor_id();
 	struct ia64_mca_notify_die nd =
 		{ .sos = sos, .monarch_cpu = &monarch_cpu };
diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c
index e1960979be2..6203ed4ec8c 100644
--- a/arch/ia64/kernel/smpboot.c
+++ b/arch/ia64/kernel/smpboot.c
@@ -124,7 +124,7 @@ extern void __devinit calibrate_delay (void);
 extern void start_ap (void);
 extern unsigned long ia64_iobase;
 
-task_t *task_for_booting_cpu;
+struct task_struct *task_for_booting_cpu;
 
 /*
  * State for each CPU
diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S
index ecfd637d702..01e7fa86aa4 100644
--- a/arch/mips/kernel/entry.S
+++ b/arch/mips/kernel/entry.S
@@ -65,7 +65,7 @@ need_resched:
 #endif
 
 FEXPORT(ret_from_fork)
-	jal	schedule_tail		# a0 = task_t *prev
+	jal	schedule_tail		# a0 = struct task_struct *prev
 
 FEXPORT(syscall_exit)
 	local_irq_disable		# make sure need_resched and
diff --git a/arch/mips/kernel/mips-mt.c b/arch/mips/kernel/mips-mt.c
index 02237a685ec..4dcc39f4295 100644
--- a/arch/mips/kernel/mips-mt.c
+++ b/arch/mips/kernel/mips-mt.c
@@ -47,7 +47,7 @@ unsigned long mt_fpemul_threshold = 0;
  * used in sys_sched_set/getaffinity() in kernel/sched.c, so
  * cloned here.
  */
-static inline task_t *find_process_by_pid(pid_t pid)
+static inline struct task_struct *find_process_by_pid(pid_t pid)
 {
 	return pid ? find_task_by_pid(pid) : current;
 }
@@ -62,7 +62,7 @@ asmlinkage long mipsmt_sys_sched_setaffinity(pid_t pid, unsigned int len,
 	cpumask_t new_mask;
 	cpumask_t effective_mask;
 	int retval;
-	task_t *p;
+	struct task_struct *p;
 
 	if (len < sizeof(new_mask))
 		return -EINVAL;
@@ -127,7 +127,7 @@ asmlinkage long mipsmt_sys_sched_getaffinity(pid_t pid, unsigned int len,
 	unsigned int real_len;
 	cpumask_t mask;
 	int retval;
-	task_t *p;
+	struct task_struct *p;
 
 	real_len = sizeof(mask);
 	if (len < real_len)
diff --git a/arch/um/kernel/tt/process_kern.c b/arch/um/kernel/tt/process_kern.c
index a9c1443fc54..8368c2dbe63 100644
--- a/arch/um/kernel/tt/process_kern.c
+++ b/arch/um/kernel/tt/process_kern.c
@@ -119,7 +119,7 @@ void suspend_new_thread(int fd)
 		panic("read failed in suspend_new_thread, err = %d", -err);
 }
 
-void schedule_tail(task_t *prev);
+void schedule_tail(struct task_struct *prev);
 
 static void new_thread_handler(int sig)
 {
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 6fb77952562..bfdb90242a9 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -2336,7 +2336,7 @@ static int fionbio(struct file *file, int __user *p)
 
 static int tiocsctty(struct tty_struct *tty, int arg)
 {
-	task_t *p;
+	struct task_struct *p;
 
 	if (current->signal->leader &&
 	    (current->signal->session == tty->session))
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 9c677bbd0b0..19ffb043abb 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -120,7 +120,7 @@ struct epoll_filefd {
  */
 struct wake_task_node {
 	struct list_head llink;
-	task_t *task;
+	struct task_struct *task;
 	wait_queue_head_t *wq;
 };
 
@@ -413,7 +413,7 @@ static void ep_poll_safewake(struct poll_safewake *psw, wait_queue_head_t *wq)
 {
 	int wake_nests = 0;
 	unsigned long flags;
-	task_t *this_task = current;
+	struct task_struct *this_task = current;
 	struct list_head *lsthead = &psw->wake_task_list, *lnk;
 	struct wake_task_node *tncur;
 	struct wake_task_node tnode;
diff --git a/include/asm-ia64/thread_info.h b/include/asm-ia64/thread_info.h
index 8bc9869e576..8adcde0934c 100644
--- a/include/asm-ia64/thread_info.h
+++ b/include/asm-ia64/thread_info.h
@@ -68,7 +68,7 @@ struct thread_info {
 #define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET)
 
 #define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR
-#define alloc_task_struct()	((task_t *)__get_free_pages(GFP_KERNEL | __GFP_COMP, KERNEL_STACK_SIZE_ORDER))
+#define alloc_task_struct()	((struct task_struct *)__get_free_pages(GFP_KERNEL | __GFP_COMP, KERNEL_STACK_SIZE_ORDER))
 #define free_task_struct(tsk)	free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
 
 #endif /* !__ASSEMBLY */
diff --git a/include/asm-m32r/system.h b/include/asm-m32r/system.h
index 66c4742f09e..311cebf44ef 100644
--- a/include/asm-m32r/system.h
+++ b/include/asm-m32r/system.h
@@ -18,7 +18,7 @@
  * switch_to(prev, next) should switch from task `prev' to `next'
  * `prev' will never be the same as `next'.
  *
- * `next' and `prev' should be task_t, but it isn't always defined
+ * `next' and `prev' should be struct task_struct, but it isn't always defined
  */
 
 #define switch_to(prev, next, last)  do { \
diff --git a/include/asm-sh/system.h b/include/asm-sh/system.h
index b752e5cbb83..ce2e60664a8 100644
--- a/include/asm-sh/system.h
+++ b/include/asm-sh/system.h
@@ -12,7 +12,7 @@
  */
 
 #define switch_to(prev, next, last) do {				\
- task_t *__last;							\
+ struct task_struct *__last;						\
  register unsigned long *__ts1 __asm__ ("r1") = &prev->thread.sp;	\
  register unsigned long *__ts2 __asm__ ("r2") = &prev->thread.pc;	\
  register unsigned long *__ts4 __asm__ ("r4") = (unsigned long *)prev;	\
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 8ebddba4448..c2797f04d93 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -184,11 +184,11 @@ extern unsigned long weighted_cpuload(const int cpu);
 extern rwlock_t tasklist_lock;
 extern spinlock_t mmlist_lock;
 
-typedef struct task_struct task_t;
+struct task_struct;
 
 extern void sched_init(void);
 extern void sched_init_smp(void);
-extern void init_idle(task_t *idle, int cpu);
+extern void init_idle(struct task_struct *idle, int cpu);
 
 extern cpumask_t nohz_cpu_mask;
 
@@ -383,7 +383,7 @@ struct signal_struct {
 	wait_queue_head_t	wait_chldexit;	/* for wait4() */
 
 	/* current thread group signal load-balancing target: */
-	task_t			*curr_target;
+	struct task_struct	*curr_target;
 
 	/* shared signal handling: */
 	struct sigpending	shared_pending;
@@ -699,7 +699,7 @@ extern int groups_search(struct group_info *group_info, gid_t grp);
     ((gi)->blocks[(i)/NGROUPS_PER_BLOCK][(i)%NGROUPS_PER_BLOCK])
 
 #ifdef ARCH_HAS_PREFETCH_SWITCH_STACK
-extern void prefetch_stack(struct task_struct*);
+extern void prefetch_stack(struct task_struct *t);
 #else
 static inline void prefetch_stack(struct task_struct *t) { }
 #endif
@@ -1031,9 +1031,9 @@ static inline void put_task_struct(struct task_struct *t)
 #define used_math() tsk_used_math(current)
 
 #ifdef CONFIG_SMP
-extern int set_cpus_allowed(task_t *p, cpumask_t new_mask);
+extern int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask);
 #else
-static inline int set_cpus_allowed(task_t *p, cpumask_t new_mask)
+static inline int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
 {
 	if (!cpu_isset(0, new_mask))
 		return -EINVAL;
@@ -1042,7 +1042,8 @@ static inline int set_cpus_allowed(task_t *p, cpumask_t new_mask)
 #endif
 
 extern unsigned long long sched_clock(void);
-extern unsigned long long current_sched_time(const task_t *current_task);
+extern unsigned long long
+current_sched_time(const struct task_struct *current_task);
 
 /* sched_exec is called by processes performing an exec */
 #ifdef CONFIG_SMP
@@ -1060,27 +1061,27 @@ static inline void idle_task_exit(void) {}
 extern void sched_idle_next(void);
 
 #ifdef CONFIG_RT_MUTEXES
-extern int rt_mutex_getprio(task_t *p);
-extern void rt_mutex_setprio(task_t *p, int prio);
-extern void rt_mutex_adjust_pi(task_t *p);
+extern int rt_mutex_getprio(struct task_struct *p);
+extern void rt_mutex_setprio(struct task_struct *p, int prio);
+extern void rt_mutex_adjust_pi(struct task_struct *p);
 #else
-static inline int rt_mutex_getprio(task_t *p)
+static inline int rt_mutex_getprio(struct task_struct *p)
 {
 	return p->normal_prio;
 }
 # define rt_mutex_adjust_pi(p)		do { } while (0)
 #endif
 
-extern void set_user_nice(task_t *p, long nice);
-extern int task_prio(const task_t *p);
-extern int task_nice(const task_t *p);
-extern int can_nice(const task_t *p, const int nice);
-extern int task_curr(const task_t *p);
+extern void set_user_nice(struct task_struct *p, long nice);
+extern int task_prio(const struct task_struct *p);
+extern int task_nice(const struct task_struct *p);
+extern int can_nice(const struct task_struct *p, const int nice);
+extern int task_curr(const struct task_struct *p);
 extern int idle_cpu(int cpu);
 extern int sched_setscheduler(struct task_struct *, int, struct sched_param *);
-extern task_t *idle_task(int cpu);
-extern task_t *curr_task(int cpu);
-extern void set_curr_task(int cpu, task_t *p);
+extern struct task_struct *idle_task(int cpu);
+extern struct task_struct *curr_task(int cpu);
+extern void set_curr_task(int cpu, struct task_struct *p);
 
 void yield(void);
 
@@ -1137,8 +1138,8 @@ extern void FASTCALL(wake_up_new_task(struct task_struct * tsk,
 #else
  static inline void kick_process(struct task_struct *tsk) { }
 #endif
-extern void FASTCALL(sched_fork(task_t * p, int clone_flags));
-extern void FASTCALL(sched_exit(task_t * p));
+extern void FASTCALL(sched_fork(struct task_struct * p, int clone_flags));
+extern void FASTCALL(sched_exit(struct task_struct * p));
 
 extern int in_group_p(gid_t);
 extern int in_egroup_p(gid_t);
@@ -1243,17 +1244,17 @@ extern NORET_TYPE void do_group_exit(int);
 extern void daemonize(const char *, ...);
 extern int allow_signal(int);
 extern int disallow_signal(int);
-extern task_t *child_reaper;
+extern struct task_struct *child_reaper;
 
 extern int do_execve(char *, char __user * __user *, char __user * __user *, struct pt_regs *);
 extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *);
-task_t *fork_idle(int);
+struct task_struct *fork_idle(int);
 
 extern void set_task_comm(struct task_struct *tsk, char *from);
 extern void get_task_comm(char *to, struct task_struct *tsk);
 
 #ifdef CONFIG_SMP
-extern void wait_task_inactive(task_t * p);
+extern void wait_task_inactive(struct task_struct * p);
 #else
 #define wait_task_inactive(p)	do { } while (0)
 #endif
@@ -1279,13 +1280,13 @@ extern void wait_task_inactive(task_t * p);
 /* de_thread depends on thread_group_leader not being a pid based check */
 #define thread_group_leader(p)	(p == p->group_leader)
 
-static inline task_t *next_thread(const task_t *p)
+static inline struct task_struct *next_thread(const struct task_struct *p)
 {
 	return list_entry(rcu_dereference(p->thread_group.next),
-				task_t, thread_group);
+			  struct task_struct, thread_group);
 }
 
-static inline int thread_group_empty(task_t *p)
+static inline int thread_group_empty(struct task_struct *p)
 {
 	return list_empty(&p->thread_group);
 }
diff --git a/kernel/capability.c b/kernel/capability.c
index 1a4d8a40d3f..c7685ad00a9 100644
--- a/kernel/capability.c
+++ b/kernel/capability.c
@@ -46,7 +46,7 @@ asmlinkage long sys_capget(cap_user_header_t header, cap_user_data_t dataptr)
      int ret = 0;
      pid_t pid;
      __u32 version;
-     task_t *target;
+     struct task_struct *target;
      struct __user_cap_data_struct data;
 
      if (get_user(version, &header->version))
@@ -96,7 +96,7 @@ static inline int cap_set_pg(int pgrp, kernel_cap_t *effective,
 			      kernel_cap_t *inheritable,
 			      kernel_cap_t *permitted)
 {
-	task_t *g, *target;
+	struct task_struct *g, *target;
 	int ret = -EPERM;
 	int found = 0;
 
@@ -128,7 +128,7 @@ static inline int cap_set_all(kernel_cap_t *effective,
 			       kernel_cap_t *inheritable,
 			       kernel_cap_t *permitted)
 {
-     task_t *g, *target;
+     struct task_struct *g, *target;
      int ret = -EPERM;
      int found = 0;
 
@@ -172,7 +172,7 @@ asmlinkage long sys_capset(cap_user_header_t header, const cap_user_data_t data)
 {
      kernel_cap_t inheritable, permitted, effective;
      __u32 version;
-     task_t *target;
+     struct task_struct *target;
      int ret;
      pid_t pid;
 
diff --git a/kernel/exit.c b/kernel/exit.c
index c595db14cf2..6664c084783 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -134,8 +134,8 @@ static void delayed_put_task_struct(struct rcu_head *rhp)
 
 void release_task(struct task_struct * p)
 {
+	struct task_struct *leader;
 	int zap_leader;
-	task_t *leader;
 repeat:
 	atomic_dec(&p->user->processes);
 	write_lock_irq(&tasklist_lock);
@@ -209,7 +209,7 @@ out:
  *
  * "I ask you, have you ever known what it is to be an orphan?"
  */
-static int will_become_orphaned_pgrp(int pgrp, task_t *ignored_task)
+static int will_become_orphaned_pgrp(int pgrp, struct task_struct *ignored_task)
 {
 	struct task_struct *p;
 	int ret = 1;
@@ -582,7 +582,8 @@ static void exit_mm(struct task_struct * tsk)
 	mmput(mm);
 }
 
-static inline void choose_new_parent(task_t *p, task_t *reaper)
+static inline void
+choose_new_parent(struct task_struct *p, struct task_struct *reaper)
 {
 	/*
 	 * Make sure we're not reparenting to ourselves and that
@@ -592,7 +593,8 @@ static inline void choose_new_parent(task_t *p, task_t *reaper)
 	p->real_parent = reaper;
 }
 
-static void reparent_thread(task_t *p, task_t *father, int traced)
+static void
+reparent_thread(struct task_struct *p, struct task_struct *father, int traced)
 {
 	/* We don't want people slaying init.  */
 	if (p->exit_signal != -1)
@@ -656,8 +658,8 @@ static void reparent_thread(task_t *p, task_t *father, int traced)
  * group, and if no such member exists, give it to
  * the global child reaper process (ie "init")
  */
-static void forget_original_parent(struct task_struct * father,
-					  struct list_head *to_release)
+static void
+forget_original_parent(struct task_struct *father, struct list_head *to_release)
 {
 	struct task_struct *p, *reaper = father;
 	struct list_head *_p, *_n;
@@ -680,7 +682,7 @@ static void forget_original_parent(struct task_struct * father,
 	 */
 	list_for_each_safe(_p, _n, &father->children) {
 		int ptrace;
-		p = list_entry(_p,struct task_struct,sibling);
+		p = list_entry(_p, struct task_struct, sibling);
 
 		ptrace = p->ptrace;
 
@@ -709,7 +711,7 @@ static void forget_original_parent(struct task_struct * father,
 			list_add(&p->ptrace_list, to_release);
 	}
 	list_for_each_safe(_p, _n, &father->ptrace_children) {
-		p = list_entry(_p,struct task_struct,ptrace_list);
+		p = list_entry(_p, struct task_struct, ptrace_list);
 		choose_new_parent(p, reaper);
 		reparent_thread(p, father, 1);
 	}
@@ -829,7 +831,7 @@ static void exit_notify(struct task_struct *tsk)
 
 	list_for_each_safe(_p, _n, &ptrace_dead) {
 		list_del_init(_p);
-		t = list_entry(_p,struct task_struct,ptrace_list);
+		t = list_entry(_p, struct task_struct, ptrace_list);
 		release_task(t);
 	}
 
@@ -1010,7 +1012,7 @@ asmlinkage void sys_exit_group(int error_code)
 	do_group_exit((error_code & 0xff) << 8);
 }
 
-static int eligible_child(pid_t pid, int options, task_t *p)
+static int eligible_child(pid_t pid, int options, struct task_struct *p)
 {
 	if (pid > 0) {
 		if (p->pid != pid)
@@ -1051,12 +1053,13 @@ static int eligible_child(pid_t pid, int options, task_t *p)
 	return 1;
 }
 
-static int wait_noreap_copyout(task_t *p, pid_t pid, uid_t uid,
+static int wait_noreap_copyout(struct task_struct *p, pid_t pid, uid_t uid,
 			       int why, int status,
 			       struct siginfo __user *infop,
 			       struct rusage __user *rusagep)
 {
 	int retval = rusagep ? getrusage(p, RUSAGE_BOTH, rusagep) : 0;
+
 	put_task_struct(p);
 	if (!retval)
 		retval = put_user(SIGCHLD, &infop->si_signo);
@@ -1081,7 +1084,7 @@ static int wait_noreap_copyout(task_t *p, pid_t pid, uid_t uid,
  * the lock and this task is uninteresting.  If we return nonzero, we have
  * released the lock and the system call should return.
  */
-static int wait_task_zombie(task_t *p, int noreap,
+static int wait_task_zombie(struct task_struct *p, int noreap,
 			    struct siginfo __user *infop,
 			    int __user *stat_addr, struct rusage __user *ru)
 {
@@ -1243,8 +1246,8 @@ static int wait_task_zombie(task_t *p, int noreap,
  * the lock and this task is uninteresting.  If we return nonzero, we have
  * released the lock and the system call should return.
  */
-static int wait_task_stopped(task_t *p, int delayed_group_leader, int noreap,
-			     struct siginfo __user *infop,
+static int wait_task_stopped(struct task_struct *p, int delayed_group_leader,
+			     int noreap, struct siginfo __user *infop,
 			     int __user *stat_addr, struct rusage __user *ru)
 {
 	int retval, exit_code;
@@ -1358,7 +1361,7 @@ bail_ref:
  * the lock and this task is uninteresting.  If we return nonzero, we have
  * released the lock and the system call should return.
  */
-static int wait_task_continued(task_t *p, int noreap,
+static int wait_task_continued(struct task_struct *p, int noreap,
 			       struct siginfo __user *infop,
 			       int __user *stat_addr, struct rusage __user *ru)
 {
@@ -1444,7 +1447,7 @@ repeat:
 		int ret;
 
 		list_for_each(_p,&tsk->children) {
-			p = list_entry(_p,struct task_struct,sibling);
+			p = list_entry(_p, struct task_struct, sibling);
 
 			ret = eligible_child(pid, options, p);
 			if (!ret)
diff --git a/kernel/fork.c b/kernel/fork.c
index 54953d8a6f1..56e4e07e45f 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -933,13 +933,13 @@ static inline void rt_mutex_init_task(struct task_struct *p)
  * parts of the process environment (as per the clone
  * flags). The actual kick-off is left to the caller.
  */
-static task_t *copy_process(unsigned long clone_flags,
-				 unsigned long stack_start,
-				 struct pt_regs *regs,
-				 unsigned long stack_size,
-				 int __user *parent_tidptr,
-				 int __user *child_tidptr,
-				 int pid)
+static struct task_struct *copy_process(unsigned long clone_flags,
+					unsigned long stack_start,
+					struct pt_regs *regs,
+					unsigned long stack_size,
+					int __user *parent_tidptr,
+					int __user *child_tidptr,
+					int pid)
 {
 	int retval;
 	struct task_struct *p = NULL;
@@ -1294,9 +1294,9 @@ struct pt_regs * __devinit __attribute__((weak)) idle_regs(struct pt_regs *regs)
 	return regs;
 }
 
-task_t * __devinit fork_idle(int cpu)
+struct task_struct * __devinit fork_idle(int cpu)
 {
-	task_t *task;
+	struct task_struct *task;
 	struct pt_regs regs;
 
 	task = copy_process(CLONE_VM, 0, idle_regs(&regs), 0, NULL, NULL, 0);
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 617304ce67d..d17766d40da 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -669,7 +669,7 @@ static int hrtimer_wakeup(struct hrtimer *timer)
 	return HRTIMER_NORESTART;
 }
 
-void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, task_t *task)
+void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, struct task_struct *task)
 {
 	sl->timer.function = hrtimer_wakeup;
 	sl->task = task;
diff --git a/kernel/pid.c b/kernel/pid.c
index eeb836b65ca..93e212f2067 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -218,7 +218,7 @@ struct pid * fastcall find_pid(int nr)
 	return NULL;
 }
 
-int fastcall attach_pid(task_t *task, enum pid_type type, int nr)
+int fastcall attach_pid(struct task_struct *task, enum pid_type type, int nr)
 {
 	struct pid_link *link;
 	struct pid *pid;
@@ -233,7 +233,7 @@ int fastcall attach_pid(task_t *task, enum pid_type type, int nr)
 	return 0;
 }
 
-void fastcall detach_pid(task_t *task, enum pid_type type)
+void fastcall detach_pid(struct task_struct *task, enum pid_type type)
 {
 	struct pid_link *link;
 	struct pid *pid;
@@ -267,7 +267,7 @@ struct task_struct * fastcall pid_task(struct pid *pid, enum pid_type type)
 /*
  * Must be called under rcu_read_lock() or with tasklist_lock read-held.
  */
-task_t *find_task_by_pid_type(int type, int nr)
+struct task_struct *find_task_by_pid_type(int type, int nr)
 {
 	return pid_task(find_pid(nr), type);
 }
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 335c5b932e1..9a111f70145 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -28,7 +28,7 @@
  *
  * Must be called with the tasklist lock write-held.
  */
-void __ptrace_link(task_t *child, task_t *new_parent)
+void __ptrace_link(struct task_struct *child, struct task_struct *new_parent)
 {
 	BUG_ON(!list_empty(&child->ptrace_list));
 	if (child->parent == new_parent)
@@ -46,7 +46,7 @@ void __ptrace_link(task_t *child, task_t *new_parent)
  * TASK_TRACED, resume it now.
  * Requires that irqs be disabled.
  */
-void ptrace_untrace(task_t *child)
+void ptrace_untrace(struct task_struct *child)
 {
 	spin_lock(&child->sighand->siglock);
 	if (child->state == TASK_TRACED) {
@@ -65,7 +65,7 @@ void ptrace_untrace(task_t *child)
  *
  * Must be called with the tasklist lock write-held.
  */
-void __ptrace_unlink(task_t *child)
+void __ptrace_unlink(struct task_struct *child)
 {
 	BUG_ON(!child->ptrace);
 
diff --git a/kernel/rtmutex-debug.c b/kernel/rtmutex-debug.c
index 353a853bc39..0c1faa950af 100644
--- a/kernel/rtmutex-debug.c
+++ b/kernel/rtmutex-debug.c
@@ -96,7 +96,7 @@ void deadlock_trace_off(void)
 	rt_trace_on = 0;
 }
 
-static void printk_task(task_t *p)
+static void printk_task(struct task_struct *p)
 {
 	if (p)
 		printk("%16s:%5d [%p, %3d]", p->comm, p->pid, p, p->prio);
@@ -231,7 +231,8 @@ void debug_rt_mutex_init(struct rt_mutex *lock, const char *name)
 	lock->name = name;
 }
 
-void rt_mutex_deadlock_account_lock(struct rt_mutex *lock, task_t *task)
+void
+rt_mutex_deadlock_account_lock(struct rt_mutex *lock, struct task_struct *task)
 {
 }
 
diff --git a/kernel/rtmutex-tester.c b/kernel/rtmutex-tester.c
index e82c2f84824..494dac872a1 100644
--- a/kernel/rtmutex-tester.c
+++ b/kernel/rtmutex-tester.c
@@ -33,7 +33,7 @@ struct test_thread_data {
 };
 
 static struct test_thread_data thread_data[MAX_RT_TEST_THREADS];
-static task_t *threads[MAX_RT_TEST_THREADS];
+static struct task_struct *threads[MAX_RT_TEST_THREADS];
 static struct rt_mutex mutexes[MAX_RT_TEST_MUTEXES];
 
 enum test_opcodes {
@@ -361,8 +361,8 @@ static ssize_t sysfs_test_command(struct sys_device *dev, const char *buf,
 static ssize_t sysfs_test_status(struct sys_device *dev, char *buf)
 {
 	struct test_thread_data *td;
+	struct task_struct *tsk;
 	char *curr = buf;
-	task_t *tsk;
 	int i;
 
 	td = container_of(dev, struct test_thread_data, sysdev);
diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c
index 91b699aa658..d2ef13b485e 100644
--- a/kernel/rtmutex.c
+++ b/kernel/rtmutex.c
@@ -157,7 +157,7 @@ int max_lock_depth = 1024;
  * Decreases task's usage by one - may thus free the task.
  * Returns 0 or -EDEADLK.
  */
-static int rt_mutex_adjust_prio_chain(task_t *task,
+static int rt_mutex_adjust_prio_chain(struct task_struct *task,
 				      int deadlock_detect,
 				      struct rt_mutex *orig_lock,
 				      struct rt_mutex_waiter *orig_waiter,
@@ -282,6 +282,7 @@ static int rt_mutex_adjust_prio_chain(task_t *task,
 	spin_unlock_irqrestore(&task->pi_lock, flags);
  out_put_task:
 	put_task_struct(task);
+
 	return ret;
 }
 
@@ -403,10 +404,10 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
 				   struct rt_mutex_waiter *waiter,
 				   int detect_deadlock)
 {
+	struct task_struct *owner = rt_mutex_owner(lock);
 	struct rt_mutex_waiter *top_waiter = waiter;
-	task_t *owner = rt_mutex_owner(lock);
-	int boost = 0, res;
 	unsigned long flags;
+	int boost = 0, res;
 
 	spin_lock_irqsave(&current->pi_lock, flags);
 	__rt_mutex_adjust_prio(current);
@@ -527,9 +528,9 @@ static void remove_waiter(struct rt_mutex *lock,
 			  struct rt_mutex_waiter *waiter)
 {
 	int first = (waiter == rt_mutex_top_waiter(lock));
-	int boost = 0;
-	task_t *owner = rt_mutex_owner(lock);
+	struct task_struct *owner = rt_mutex_owner(lock);
 	unsigned long flags;
+	int boost = 0;
 
 	spin_lock_irqsave(&current->pi_lock, flags);
 	plist_del(&waiter->list_entry, &lock->wait_list);
diff --git a/kernel/sched.c b/kernel/sched.c
index b0326141f84..021b3121951 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -179,7 +179,7 @@ static unsigned int static_prio_timeslice(int static_prio)
 		return SCALE_PRIO(DEF_TIMESLICE, static_prio);
 }
 
-static inline unsigned int task_timeslice(task_t *p)
+static inline unsigned int task_timeslice(struct task_struct *p)
 {
 	return static_prio_timeslice(p->static_prio);
 }
@@ -227,7 +227,7 @@ struct runqueue {
 
 	unsigned long expired_timestamp;
 	unsigned long long timestamp_last_tick;
-	task_t *curr, *idle;
+	struct task_struct *curr, *idle;
 	struct mm_struct *prev_mm;
 	prio_array_t *active, *expired, arrays[2];
 	int best_expired_prio;
@@ -240,7 +240,7 @@ struct runqueue {
 	int active_balance;
 	int push_cpu;
 
-	task_t *migration_thread;
+	struct task_struct *migration_thread;
 	struct list_head migration_queue;
 #endif
 
@@ -291,16 +291,16 @@ static DEFINE_PER_CPU(struct runqueue, runqueues);
 #endif
 
 #ifndef __ARCH_WANT_UNLOCKED_CTXSW
-static inline int task_running(runqueue_t *rq, task_t *p)
+static inline int task_running(runqueue_t *rq, struct task_struct *p)
 {
 	return rq->curr == p;
 }
 
-static inline void prepare_lock_switch(runqueue_t *rq, task_t *next)
+static inline void prepare_lock_switch(runqueue_t *rq, struct task_struct *next)
 {
 }
 
-static inline void finish_lock_switch(runqueue_t *rq, task_t *prev)
+static inline void finish_lock_switch(runqueue_t *rq, struct task_struct *prev)
 {
 #ifdef CONFIG_DEBUG_SPINLOCK
 	/* this is a valid case when another task releases the spinlock */
@@ -317,7 +317,7 @@ static inline void finish_lock_switch(runqueue_t *rq, task_t *prev)
 }
 
 #else /* __ARCH_WANT_UNLOCKED_CTXSW */
-static inline int task_running(runqueue_t *rq, task_t *p)
+static inline int task_running(runqueue_t *rq, struct task_struct *p)
 {
 #ifdef CONFIG_SMP
 	return p->oncpu;
@@ -326,7 +326,7 @@ static inline int task_running(runqueue_t *rq, task_t *p)
 #endif
 }
 
-static inline void prepare_lock_switch(runqueue_t *rq, task_t *next)
+static inline voi