sched: fix confusing PFA_NO_NEW_PRIVS constant

[pandora-kernel.git] / include / linux / sched.h

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 0376b05..4557765 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -33,6 +33,7 @@ struct sched_param {
 
 #include <linux/smp.h>
 #include <linux/sem.h>
+#include <linux/shm.h>
 #include <linux/signal.h>
 #include <linux/compiler.h>
 #include <linux/completion.h>
@@ -168,8 +169,7 @@ extern int nr_processes(void);
 extern unsigned long nr_running(void);
 extern unsigned long nr_iowait(void);
 extern unsigned long nr_iowait_cpu(int cpu);
-extern unsigned long this_cpu_load(void);
-
+extern void get_iowait_load(unsigned long *nr_waiters, unsigned long *load);
 
 extern void calc_global_load(unsigned long ticks);
 extern void update_cpu_load_nohz(void);
@@ -813,7 +813,7 @@ struct task_delay_info {
         * associated with the operation is added to XXX_delay.
         * XXX_delay contains the accumulated delay time in nanoseconds.
         */
-       struct timespec blkio_start, blkio_end; /* Shared by blkio, swapin */
+       u64 blkio_start;        /* Shared by blkio, swapin */
        u64 blkio_delay;        /* wait for sync block io completion */
        u64 swapin_delay;       /* wait for swapin block io completion */
        u32 blkio_count;        /* total count of the number of sync block */
@@ -821,7 +821,7 @@ struct task_delay_info {
        u32 swapin_count;       /* total count of the number of swapin block */
                                /* io operations performed */
 
-       struct timespec freepages_start, freepages_end;
+       u64 freepages_start;
        u64 freepages_delay;    /* wait for memory reclaim */
        u32 freepages_count;    /* total count of memory reclaim */
 };
@@ -1270,9 +1270,6 @@ struct task_struct {
 #ifdef CONFIG_TREE_PREEMPT_RCU
        struct rcu_node *rcu_blocked_node;
 #endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */
-#ifdef CONFIG_RCU_BOOST
-       struct rt_mutex *rcu_boost_mutex;
-#endif /* #ifdef CONFIG_RCU_BOOST */
 
 #if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
        struct sched_info sched_info;
@@ -1307,13 +1304,12 @@ struct task_struct {
                                 * execve */
        unsigned in_iowait:1;
 
-       /* task may not gain privileges */
-       unsigned no_new_privs:1;
-
        /* Revert to default priority/policy when forking */
        unsigned sched_reset_on_fork:1;
        unsigned sched_contributes_to_load:1;
 
+       unsigned long atomic_flags; /* Flags needing atomic access. */
+
        pid_t pid;
        pid_t tgid;
 
@@ -1367,8 +1363,8 @@ struct task_struct {
        } vtime_snap_whence;
 #endif
        unsigned long nvcsw, nivcsw; /* context switch counts */
-       struct timespec start_time;             /* monotonic time */
-       struct timespec real_start_time;        /* boot based time */
+       u64 start_time;         /* monotonic time in nsec */
+       u64 real_start_time;    /* boot based time in nsec */
 /* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */
        unsigned long min_flt, maj_flt;
 
@@ -1389,6 +1385,7 @@ struct task_struct {
 #ifdef CONFIG_SYSVIPC
 /* ipc stuff */
        struct sysv_sem sysvsem;
+       struct sysv_shm sysvshm;
 #endif
 #ifdef CONFIG_DETECT_HUNG_TASK
 /* hung task detection */
@@ -1440,8 +1437,6 @@ struct task_struct {
        struct rb_node *pi_waiters_leftmost;
        /* Deadlock detection and priority inheritance handling */
        struct rt_mutex_waiter *pi_blocked_on;
-       /* Top pi_waiters task */
-       struct task_struct *pi_top_task;
 #endif
 
 #ifdef CONFIG_DEBUG_MUTEXES
@@ -1634,12 +1629,6 @@ struct task_struct {
        unsigned long trace_recursion;
 #endif /* CONFIG_TRACING */
 #ifdef CONFIG_MEMCG /* memcg uses this to do batch job */
-       struct memcg_batch_info {
-               int do_batch;   /* incremented when batch uncharge started */
-               struct mem_cgroup *memcg; /* target memcg of uncharge */
-               unsigned long nr_pages; /* uncharged usage */
-               unsigned long memsw_nr_pages; /* uncharged mem+swap usage */
-       } memcg_batch;
        unsigned int memcg_kmem_skip_account;
        struct memcg_oom_info {
                struct mem_cgroup *memcg;
@@ -1967,6 +1956,19 @@ static inline void memalloc_noio_restore(unsigned int flags)
        current->flags = (current->flags & ~PF_MEMALLOC_NOIO) | flags;
 }
 
+/* Per-process atomic flags. */
+#define PFA_NO_NEW_PRIVS 0     /* May not gain new privileges. */
+
+static inline bool task_no_new_privs(struct task_struct *p)
+{
+       return test_bit(PFA_NO_NEW_PRIVS, &p->atomic_flags);
+}
+
+static inline void task_set_no_new_privs(struct task_struct *p)
+{
+       set_bit(PFA_NO_NEW_PRIVS, &p->atomic_flags);
+}
+
 /*
  * task->jobctl flags
  */
@@ -2009,9 +2011,6 @@ static inline void rcu_copy_process(struct task_struct *p)
 #ifdef CONFIG_TREE_PREEMPT_RCU
        p->rcu_blocked_node = NULL;
 #endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */
-#ifdef CONFIG_RCU_BOOST
-       p->rcu_boost_mutex = NULL;
-#endif /* #ifdef CONFIG_RCU_BOOST */
        INIT_LIST_HEAD(&p->rcu_node_entry);
 }
 
@@ -2360,8 +2359,10 @@ static inline int on_sig_stack(unsigned long sp)
 
 static inline int sas_ss_flags(unsigned long sp)
 {
-       return (current->sas_ss_size == 0 ? SS_DISABLE
-               : on_sig_stack(sp) ? SS_ONSTACK : 0);
+       if (!current->sas_ss_size)
+               return SS_DISABLE;
+
+       return on_sig_stack(sp) ? SS_ONSTACK : 0;
 }
 
 static inline unsigned long sigsp(unsigned long sp, struct ksignal *ksig)
@@ -2788,7 +2789,7 @@ static inline bool __must_check current_set_polling_and_test(void)
 
        /*
         * Polling state must be visible before we test NEED_RESCHED,
-        * paired by resched_task()
+        * paired by resched_curr()
         */
        smp_mb__after_atomic();
 
@@ -2806,7 +2807,7 @@ static inline bool __must_check current_clr_polling_and_test(void)
 
        /*
         * Polling state must be visible before we test NEED_RESCHED,
-        * paired by resched_task()
+        * paired by resched_curr()
         */
        smp_mb__after_atomic();
 
@@ -2838,7 +2839,7 @@ static inline void current_clr_polling(void)
         * TIF_NEED_RESCHED and the IPI handler, scheduler_ipi(), will also
         * fold.
         */
-       smp_mb(); /* paired with resched_task() */
+       smp_mb(); /* paired with resched_curr() */
 
        preempt_fold_need_resched();
 }
@@ -2963,15 +2964,10 @@ static inline void inc_syscw(struct task_struct *tsk)
 
 #ifdef CONFIG_MEMCG
 extern void mm_update_next_owner(struct mm_struct *mm);
-extern void mm_init_owner(struct mm_struct *mm, struct task_struct *p);
 #else
 static inline void mm_update_next_owner(struct mm_struct *mm)
 {
 }
-
-static inline void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
-{
-}
 #endif /* CONFIG_MEMCG */
 
 static inline unsigned long task_rlimit(const struct task_struct *tsk,