1 files changed, 9 insertions, 55 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 644ffbda17ca..2036e9f26020 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -572,12 +572,6 @@ struct signal_struct {
          */
         struct rlimit rlim[RLIM_NLIMITS];
 
-        /* keep the process-shared keyrings here so that they do the right
-         * thing in threads created with CLONE_THREAD */
-#ifdef CONFIG_KEYS
-        struct key *session_keyring;    /* keyring inherited over fork */
-        struct key *process_keyring;    /* keyring private to this process */
-#endif
 #ifdef CONFIG_BSD_PROCESS_ACCT
         struct pacct_struct pacct;      /* per-process accounting information */
 #endif
@@ -661,6 +655,7 @@ extern struct user_struct *find_user(uid_t);
 extern struct user_struct root_user;
 #define INIT_USER (&root_user)
 
+
 struct backing_dev_info;
 struct reclaim_state;
 
@@ -884,38 +879,7 @@ partition_sched_domains(int ndoms_new, cpumask_t *doms_new,
 #endif  /* !CONFIG_SMP */
 
 struct io_context;                      /* See blkdev.h */
-#define NGROUPS_SMALL           32
-#define NGROUPS_PER_BLOCK       ((unsigned int)(PAGE_SIZE / sizeof(gid_t)))
-struct group_info {
-        int ngroups;
-        atomic_t usage;
-        gid_t small_block[NGROUPS_SMALL];
-        int nblocks;
-        gid_t *blocks[0];
-};
 
-/*
- * get_group_info() must be called with the owning task locked (via task_lock())
- * when task != current.  The reason being that the vast majority of callers are
- * looking at current->group_info, which can not be changed except by the
- * current task.  Changing current->group_info requires the task lock, too.
- */
-#define get_group_info(group_info) do { \
-        atomic_inc(&(group_info)->usage); \
-} while (0)
-
-#define put_group_info(group_info) do { \
-        if (atomic_dec_and_test(&(group_info)->usage)) \
-                groups_free(group_info); \
-} while (0)
-
-extern struct group_info *groups_alloc(int gidsetsize);
-extern void groups_free(struct group_info *group_info);
-extern int set_current_groups(struct group_info *group_info);
-extern int groups_search(struct group_info *group_info, gid_t grp);
-/* access the groups "array" with this macro */
-#define GROUP_AT(gi, i) \
-    ((gi)->blocks[(i)/NGROUPS_PER_BLOCK][(i)%NGROUPS_PER_BLOCK])
 
 #ifdef ARCH_HAS_PREFETCH_SWITCH_STACK
 extern void prefetch_stack(struct task_struct *t);
@@ -1182,17 +1146,12 @@ struct task_struct {
         struct list_head cpu_timers[3];
 
 /* process credentials */
-        uid_t uid,euid,suid,fsuid;
-        gid_t gid,egid,sgid,fsgid;
-        struct group_info *group_info;
-        kernel_cap_t   cap_effective, cap_inheritable, cap_permitted, cap_bset;
-        struct user_struct *user;
-        unsigned securebits;
-#ifdef CONFIG_KEYS
-        unsigned char jit_keyring;      /* default keyring to attach requested keys to */
-        struct key *request_key_auth;   /* assumed request_key authority */
-        struct key *thread_keyring;     /* keyring private to this thread */
-#endif
+        const struct cred *real_cred;   /* objective and real subjective task
+                                         * credentials (COW) */
+        const struct cred *cred;        /* effective (overridable) subjective task
+                                         * credentials (COW) */
+        struct mutex cred_exec_mutex;   /* execve vs ptrace cred calculation mutex */
+
         char comm[TASK_COMM_LEN]; /* executable name excluding path
                                      - access with [gs]et_task_comm (which lock
                                        it with task_lock())
@@ -1229,9 +1188,6 @@ struct task_struct {
         int (*notifier)(void *priv);
         void *notifier_data;
         sigset_t *notifier_mask;
-#ifdef CONFIG_SECURITY
-        void *security;
-#endif
         struct audit_context *audit_context;
 #ifdef CONFIG_AUDITSYSCALL
         uid_t loginuid;
@@ -1771,7 +1727,6 @@ static inline struct user_struct *get_uid(struct user_struct *u)
         return u;
 }
 extern void free_uid(struct user_struct *);
-extern void switch_uid(struct user_struct *);
 extern void release_uids(struct user_namespace *ns);
 
 #include <asm/current.h>
@@ -1790,9 +1745,6 @@ extern void wake_up_new_task(struct task_struct *tsk,
 extern void sched_fork(struct task_struct *p, int clone_flags);
 extern void sched_dead(struct task_struct *p);
 
-extern int in_group_p(gid_t);
-extern int in_egroup_p(gid_t);
-
 extern void proc_caches_init(void);
 extern void flush_signals(struct task_struct *);
 extern void ignore_signals(struct task_struct *);
@@ -1924,6 +1876,8 @@ static inline unsigned long wait_task_inactive(struct task_struct *p,
 #define for_each_process(p) \
         for (p = &init_task ; (p = next_task(p)) != &init_task ; )
 
+extern bool is_single_threaded(struct task_struct *);
+
 /*
  * Careful: do_each_thread/while_each_thread is a double loop so
  *          'break' will not work as expected - use goto instead.