[PATCH] percpu data: only iterate over possible CPUs

[pandora-kernel.git] / fs / exec.c

diff --git a/fs/exec.c b/fs/exec.c
index c466fec..055378d 100644 (file)
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -306,9 +306,6 @@ void install_arg_page(struct vm_area_struct *vma,
                        struct page *page, unsigned long address)
 {
        struct mm_struct *mm = vma->vm_mm;
-       pgd_t * pgd;
-       pud_t * pud;
-       pmd_t * pmd;
        pte_t * pte;
        spinlock_t *ptl;
 
@@ -316,14 +313,7 @@ void install_arg_page(struct vm_area_struct *vma,
                goto out;
 
        flush_dcache_page(page);
-       pgd = pgd_offset(mm, address);
-       pud = pud_alloc(mm, pgd, address);
-       if (!pud)
-               goto out;
-       pmd = pmd_alloc(mm, pud, address);
-       if (!pmd)
-               goto out;
-       pte = pte_alloc_map_lock(mm, pmd, address, &ptl);
+       pte = get_locked_pte(mm, address, &ptl);
        if (!pte)
                goto out;
        if (!pte_none(*pte)) {
@@ -334,7 +324,7 @@ void install_arg_page(struct vm_area_struct *vma,
        lru_cache_add_active(page);
        set_pte_at(mm, address, pte, pte_mkdirty(pte_mkwrite(mk_pte(
                                        page, vma->vm_page_prot))));
-       page_add_anon_rmap(page, vma, address);
+       page_add_new_anon_rmap(page, vma, address);
        pte_unmap_unlock(pte, ptl);
 
        /* no need for flush_tlb */
@@ -487,7 +477,7 @@ struct file *open_exec(const char *name)
        int err;
        struct file *file;
 
-       err = path_lookup_open(name, LOOKUP_FOLLOW, &nd, FMODE_READ);
+       err = path_lookup_open(AT_FDCWD, name, LOOKUP_FOLLOW, &nd, FMODE_READ);
        file = ERR_PTR(err);
 
        if (!err) {
@@ -585,7 +575,7 @@ static int exec_mmap(struct mm_struct *mm)
  * disturbing other processes.  (Other processes might share the signal
  * table via the CLONE_SIGHAND option to clone().)
  */
-static inline int de_thread(struct task_struct *tsk)
+static int de_thread(struct task_struct *tsk)
 {
        struct signal_struct *sig = tsk->signal;
        struct sighand_struct *newsighand, *oldsighand = tsk->sighand;
@@ -642,10 +632,10 @@ static inline int de_thread(struct task_struct *tsk)
                 * synchronize with any firing (by calling del_timer_sync)
                 * before we can safely let the old group leader die.
                 */
-               sig->real_timer.data = (unsigned long)current;
+               sig->real_timer.data = current;
                spin_unlock_irq(lock);
-               if (del_timer_sync(&sig->real_timer))
-                       add_timer(&sig->real_timer);
+               if (hrtimer_cancel(&sig->real_timer))
+                       hrtimer_restart(&sig->real_timer);
                spin_lock_irq(lock);
        }
        while (atomic_read(&sig->count) > count) {
@@ -668,7 +658,7 @@ static inline int de_thread(struct task_struct *tsk)
        if (!thread_group_leader(current)) {
                struct task_struct *parent;
                struct dentry *proc_dentry1, *proc_dentry2;
-               unsigned long exit_state, ptrace;
+               unsigned long ptrace;
 
                /*
                 * Wait for the thread group leader to be a zombie.
@@ -726,15 +716,15 @@ static inline int de_thread(struct task_struct *tsk)
                list_del(&current->tasks);
                list_add_tail(&current->tasks, &init_task.tasks);
                current->exit_signal = SIGCHLD;
-               exit_state = leader->exit_state;
+
+               BUG_ON(leader->exit_state != EXIT_ZOMBIE);
+               leader->exit_state = EXIT_DEAD;
 
                write_unlock_irq(&tasklist_lock);
                spin_unlock(&leader->proc_lock);
                spin_unlock(&current->proc_lock);
                proc_pid_flush(proc_dentry1);
                proc_pid_flush(proc_dentry2);
-
-               BUG_ON(exit_state != EXIT_ZOMBIE);
         }
 
        /*
@@ -770,7 +760,7 @@ no_thread_group:
                spin_lock(&oldsighand->siglock);
                spin_lock(&newsighand->siglock);
 
-               current->sighand = newsighand;
+               rcu_assign_pointer(current->sighand, newsighand);
                recalc_sigpending();
 
                spin_unlock(&newsighand->siglock);
@@ -778,7 +768,7 @@ no_thread_group:
                write_unlock_irq(&tasklist_lock);
 
                if (atomic_dec_and_test(&oldsighand->count))
-                       kmem_cache_free(sighand_cachep, oldsighand);
+                       sighand_free(oldsighand);
        }
 
        BUG_ON(!thread_group_leader(current));
@@ -790,7 +780,7 @@ no_thread_group:
  * so that a new one can be started
  */
 
-static inline void flush_old_files(struct files_struct * files)
+static void flush_old_files(struct files_struct * files)
 {
        long j = -1;
        struct fdtable *fdt;
@@ -974,7 +964,7 @@ int prepare_binprm(struct linux_binprm *bprm)
 
 EXPORT_SYMBOL(prepare_binprm);
 
-static inline int unsafe_exec(struct task_struct *p)
+static int unsafe_exec(struct task_struct *p)
 {
        int unsafe = 0;
        if (p->ptrace & PT_PTRACED) {
@@ -1472,6 +1462,7 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
        if (!(current->signal->flags & SIGNAL_GROUP_EXIT)) {
                current->signal->flags = SIGNAL_GROUP_EXIT;
                current->signal->group_exit_code = exit_code;
+               current->signal->group_stop_count = 0;
                retval = 0;
        }
        spin_unlock_irq(&current->sighand->siglock);
@@ -1487,7 +1478,6 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
         * Clear any false indication of pending signals that might
         * be seen by the filesystem code called to write the core file.
         */
-       current->signal->group_stop_count = 0;
        clear_thread_flag(TIF_SIGPENDING);
 
        if (current->signal->rlim[RLIMIT_CORE].rlim_cur < binfmt->min_coredump)
@@ -1515,7 +1505,7 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
                goto close_fail;
        if (!file->f_op->write)
                goto close_fail;
-       if (do_truncate(file->f_dentry, 0, file) != 0)
+       if (do_truncate(file->f_dentry, 0, 0, file) != 0)
                goto close_fail;
 
        retval = binfmt->core_dump(signr, regs, file);