OMAP: dmtimer: enable all timers to be wakeup events

[linux-2.6-omap-h63xx.git] / kernel / fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index a66fbde20715bb2d93180b7b3d03541d31d9c068..47c15840a3813ee3fcabe5f89d04bf73c08b66c2 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -61,6 +61,7 @@
 #include <linux/proc_fs.h>
 #include <linux/blkdev.h>
 #include <trace/sched.h>
+#include <linux/magic.h>
 
 #include <asm/pgtable.h>
 #include <asm/pgalloc.h>
@@ -212,6 +213,8 @@ static struct task_struct *dup_task_struct(struct task_struct *orig)
 {
        struct task_struct *tsk;
        struct thread_info *ti;
+       unsigned long *stackend;
+
        int err;
 
        prepare_to_copy(orig);
@@ -237,6 +240,8 @@ static struct task_struct *dup_task_struct(struct task_struct *orig)
                goto out;
 
        setup_thread_stack(tsk, orig);
+       stackend = end_of_stack(tsk);
+       *stackend = STACK_END_MAGIC;    /* for overflow detection */
 
 #ifdef CONFIG_CC_STACKPROTECTOR
        tsk->stack_canary = get_random_int();
@@ -279,7 +284,7 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
        mm->free_area_cache = oldmm->mmap_base;
        mm->cached_hole_size = ~0UL;
        mm->map_count = 0;
-       cpus_clear(mm->cpu_vm_mask);
+       cpumask_clear(mm_cpumask(mm));
        mm->mm_rb = RB_ROOT;
        rb_link = &mm->mm_rb.rb_node;
        rb_parent = NULL;
@@ -1179,10 +1184,6 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 #endif
        clear_all_latency_tracing(p);
 
-       /* Our parent execution domain becomes current domain
-          These must match for thread signalling to apply */
-       p->parent_exec_id = p->self_exec_id;
-
        /* ok, now we should be set up.. */
        p->exit_signal = (clone_flags & CLONE_THREAD) ? -1 : (clone_flags & CSIGNAL);
        p->pdeath_signal = 0;
@@ -1220,10 +1221,13 @@ static struct task_struct *copy_process(unsigned long clone_flags,
                set_task_cpu(p, smp_processor_id());
 
        /* CLONE_PARENT re-uses the old parent */
-       if (clone_flags & (CLONE_PARENT|CLONE_THREAD))
+       if (clone_flags & (CLONE_PARENT|CLONE_THREAD)) {
                p->real_parent = current->real_parent;
-       else
+               p->parent_exec_id = current->parent_exec_id;
+       } else {
                p->real_parent = current;
+               p->parent_exec_id = current->self_exec_id;
+       }
 
        spin_lock(&current->sighand->siglock);