Merge branch 'linus' into core/softlockup

Conflicts:
	kernel/sysctl.c

1 files changed, 90 insertions, 46 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index d05e2b3ae41a..763b525227dc 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -68,7 +68,7 @@ struct sched_param {
 #include <linux/smp.h>
 #include <linux/sem.h>
 #include <linux/signal.h>
-#include <linux/fs_struct.h>
+#include <linux/path.h>
 #include <linux/compiler.h>
 #include <linux/completion.h>
 #include <linux/pid.h>
@@ -97,6 +97,7 @@ struct futex_pi_state;
 struct robust_list_head;
 struct bio;
 struct bts_tracer;
+struct fs_struct;
 
 /*
  * List of flags we want to share for kernel threads,
@@ -137,6 +138,8 @@ extern unsigned long nr_uninterruptible(void);
 extern unsigned long nr_active(void);
 extern unsigned long nr_iowait(void);
 
+extern unsigned long get_parent_ip(unsigned long addr);
+
 struct seq_file;
 struct cfs_rq;
 struct task_group;
@@ -334,7 +337,9 @@ extern signed long 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);
 asmlinkage void schedule(void);
+extern int mutex_spin_on_owner(struct mutex *lock, struct thread_info *owner);
 
 struct nsproxy;
 struct user_namespace;
@@ -392,8 +397,15 @@ extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);
                 (mm)->hiwater_vm = (mm)->total_vm;      \
 } while (0)
 
-#define get_mm_hiwater_rss(mm)  max((mm)->hiwater_rss, get_mm_rss(mm))
-#define get_mm_hiwater_vm(mm)   max((mm)->hiwater_vm, (mm)->total_vm)
+static inline unsigned long get_mm_hiwater_rss(struct mm_struct *mm)
+{
+        return max(mm->hiwater_rss, get_mm_rss(mm));
+}
+
+static inline unsigned long get_mm_hiwater_vm(struct mm_struct *mm)
+{
+        return max(mm->hiwater_vm, mm->total_vm);
+}
 
 extern void set_dumpable(struct mm_struct *mm, int value);
 extern int get_dumpable(struct mm_struct *mm);
@@ -541,25 +553,8 @@ struct signal_struct {
 
         struct list_head cpu_timers[3];
 
-        /* job control IDs */
-
-        /*
-         * pgrp and session fields are deprecated.
-         * use the task_session_Xnr and task_pgrp_Xnr routines below
-         */
-
-        union {
-                pid_t pgrp __deprecated;
-                pid_t __pgrp;
-        };
-
         struct pid *tty_old_pgrp;
 
-        union {
-                pid_t session __deprecated;
-                pid_t __session;
-        };
-
         /* boolean value for session group leader */
         int leader;
 
@@ -1001,6 +996,7 @@ struct sched_class {
                               struct rq *busiest, struct sched_domain *sd,
                               enum cpu_idle_type idle);
         void (*pre_schedule) (struct rq *this_rq, struct task_struct *task);
+        int (*needs_post_schedule) (struct rq *this_rq);
         void (*post_schedule) (struct rq *this_rq);
         void (*task_wake_up) (struct rq *this_rq, struct task_struct *task);
 
@@ -1055,6 +1051,10 @@ struct sched_entity {
         u64                     last_wakeup;
         u64                     avg_overlap;
 
+        u64                     start_runtime;
+        u64                     avg_wakeup;
+        u64                     nr_migrations;
+
 #ifdef CONFIG_SCHEDSTATS
         u64                     wait_start;
         u64                     wait_max;
@@ -1070,7 +1070,6 @@ struct sched_entity {
         u64                     exec_max;
         u64                     slice_max;
 
-        u64                     nr_migrations;
         u64                     nr_migrations_cold;
         u64                     nr_failed_migrations_affine;
         u64                     nr_failed_migrations_running;
@@ -1167,6 +1166,7 @@ struct task_struct {
 #endif
 
         struct list_head tasks;
+        struct plist_node pushable_tasks;
 
         struct mm_struct *mm, *active_mm;
 
@@ -1178,13 +1178,14 @@ struct task_struct {
         /* ??? */
         unsigned int personality;
         unsigned did_exec:1;
+        unsigned in_execve:1;   /* Tell the LSMs that the process is doing an
+                                 * execve */
         pid_t pid;
         pid_t tgid;
 
-#ifdef CONFIG_CC_STACKPROTECTOR
         /* Canary value for the -fstack-protector gcc feature */
         unsigned long stack_canary;
-#endif
+
         /* 
          * pointers to (original) parent process, youngest child, younger sibling,
          * older sibling, respectively.  (p->father can be replaced with 
@@ -1330,6 +1331,7 @@ struct task_struct {
         int lockdep_depth;
         unsigned int lockdep_recursion;
         struct held_lock held_locks[MAX_LOCK_DEPTH];
+        gfp_t lockdep_reclaim_gfp;
 #endif
 
 /* journalling filesystem info */
@@ -1407,6 +1409,8 @@ struct task_struct {
         int curr_ret_stack;
         /* Stack of return addresses for return function tracing */
         struct ftrace_ret_stack *ret_stack;
+        /* time stamp for last schedule */
+        unsigned long long ftrace_timestamp;
         /*
          * Number of functions that haven't been traced
          * because of depth overrun.
@@ -1421,6 +1425,9 @@ struct task_struct {
 #endif
 };
 
+/* Future-safe accessor for struct task_struct's cpus_allowed. */
+#define tsk_cpumask(tsk) (&(tsk)->cpus_allowed)
+
 /*
  * Priority of a process goes from 0..MAX_PRIO-1, valid RT
  * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH
@@ -1452,16 +1459,6 @@ static inline int rt_task(struct task_struct *p)
         return rt_prio(p->prio);
 }
 
-static inline void set_task_session(struct task_struct *tsk, pid_t session)
-{
-        tsk->signal->__session = session;
-}
-
-static inline void set_task_pgrp(struct task_struct *tsk, pid_t pgrp)
-{
-        tsk->signal->__pgrp = pgrp;
-}
-
 static inline struct pid *task_pid(struct task_struct *task)
 {
         return task->pids[PIDTYPE_PID].pid;
@@ -1472,6 +1469,11 @@ static inline struct pid *task_tgid(struct task_struct *task)
         return task->group_leader->pids[PIDTYPE_PID].pid;
 }
 
+/*
+ * Without tasklist or rcu lock it is not safe to dereference
+ * the result of task_pgrp/task_session even if task == current,
+ * we can race with another thread doing sys_setsid/sys_setpgid.
+ */
 static inline struct pid *task_pgrp(struct task_struct *task)
 {
         return task->group_leader->pids[PIDTYPE_PGID].pid;
@@ -1497,17 +1499,23 @@ struct pid_namespace;
  *
  * see also pid_nr() etc in include/linux/pid.h
  */
+pid_t __task_pid_nr_ns(struct task_struct *task, enum pid_type type,
+                        struct pid_namespace *ns);
 
 static inline pid_t task_pid_nr(struct task_struct *tsk)
 {
         return tsk->pid;
 }
 
-pid_t task_pid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);
+static inline pid_t task_pid_nr_ns(struct task_struct *tsk,
+                                        struct pid_namespace *ns)
+{
+        return __task_pid_nr_ns(tsk, PIDTYPE_PID, ns);
+}
 
 static inline pid_t task_pid_vnr(struct task_struct *tsk)
 {
-        return pid_vnr(task_pid(tsk));
+        return __task_pid_nr_ns(tsk, PIDTYPE_PID, NULL);
 }
 
 
@@ -1524,31 +1532,34 @@ static inline pid_t task_tgid_vnr(struct task_struct *tsk)
 }
 
 
-static inline pid_t task_pgrp_nr(struct task_struct *tsk)
+static inline pid_t task_pgrp_nr_ns(struct task_struct *tsk,
+                                        struct pid_namespace *ns)
 {
-        return tsk->signal->__pgrp;
+        return __task_pid_nr_ns(tsk, PIDTYPE_PGID, ns);
 }
 
-pid_t task_pgrp_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);
-
 static inline pid_t task_pgrp_vnr(struct task_struct *tsk)
 {
-        return pid_vnr(task_pgrp(tsk));
+        return __task_pid_nr_ns(tsk, PIDTYPE_PGID, NULL);
 }
 
 
-static inline pid_t task_session_nr(struct task_struct *tsk)
+static inline pid_t task_session_nr_ns(struct task_struct *tsk,
+                                        struct pid_namespace *ns)
 {
-        return tsk->signal->__session;
+        return __task_pid_nr_ns(tsk, PIDTYPE_SID, ns);
 }
 
-pid_t task_session_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);
-
 static inline pid_t task_session_vnr(struct task_struct *tsk)
 {
-        return pid_vnr(task_session(tsk));
+        return __task_pid_nr_ns(tsk, PIDTYPE_SID, NULL);
 }
 
+/* obsolete, do not use */
+static inline pid_t task_pgrp_nr(struct task_struct *tsk)
+{
+        return task_pgrp_nr_ns(tsk, &init_pid_ns);
+}
 
 /**
  * pid_alive - check that a task structure is not stale
@@ -1672,6 +1683,16 @@ static inline int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
         return set_cpus_allowed_ptr(p, &new_mask);
 }
 
+/*
+ * Architectures can set this to 1 if they have specified
+ * CONFIG_HAVE_UNSTABLE_SCHED_CLOCK in their arch Kconfig,
+ * but then during bootup it turns out that sched_clock()
+ * is reliable after all:
+ */
+#ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
+extern int sched_clock_stable;
+#endif
+
 extern unsigned long long sched_clock(void);
 
 extern void sched_clock_init(void);
@@ -1948,7 +1969,8 @@ extern void mm_release(struct task_struct *, struct mm_struct *);
 /* Allocate a new mm structure and copy contents from tsk->mm */
 extern struct mm_struct *dup_mm(struct task_struct *tsk);
 
-extern int  copy_thread(int, unsigned long, unsigned long, unsigned long, struct task_struct *, struct pt_regs *);
+extern int copy_thread(unsigned long, unsigned long, unsigned long,
+                        struct task_struct *, struct pt_regs *);
 extern void flush_thread(void);
 extern void exit_thread(void);
 
@@ -2033,6 +2055,11 @@ static inline int thread_group_empty(struct task_struct *p)
 #define delay_group_leader(p) \
                 (thread_group_leader(p) && !thread_group_empty(p))
 
+static inline int task_detached(struct task_struct *p)
+{
+        return p->exit_signal == -1;
+}
+
 /*
  * Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring
  * subscriptions and synchronises with wait4().  Also used in procfs.  Also
@@ -2089,6 +2116,19 @@ static inline int object_is_on_stack(void *obj)
 
 extern void thread_info_cache_init(void);
 
+#ifdef CONFIG_DEBUG_STACK_USAGE
+static inline unsigned long stack_not_used(struct task_struct *p)
+{
+        unsigned long *n = end_of_stack(p);
+
+        do {    /* Skip over canary */
+                n++;
+        } while (!*n);
+
+        return (unsigned long)n - (unsigned long)end_of_stack(p);
+}
+#endif
+
 /* set thread flags in other task's structures
  * - see asm/thread_info.h for TIF_xxxx flags available
  */
@@ -2293,9 +2333,13 @@ extern long sched_group_rt_runtime(struct task_group *tg);
 extern int sched_group_set_rt_period(struct task_group *tg,
                                       long rt_period_us);
 extern long sched_group_rt_period(struct task_group *tg);
+extern int sched_rt_can_attach(struct task_group *tg, struct task_struct *tsk);
 #endif
 #endif
 
+extern int task_can_switch_user(struct user_struct *up,
+                                        struct task_struct *tsk);
+
 #ifdef CONFIG_TASK_XACCT
 static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
 {