Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...

[sfrench/cifs-2.6.git] / kernel / fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index 6144b36cd897512273f18c94f0d89958b21666c4..7b8f2a78be3db0820c479cba2d83ea8f2562be46 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -400,6 +400,18 @@ __cacheline_aligned_in_smp DEFINE_SPINLOCK(mmlist_lock);
 #define allocate_mm()  (kmem_cache_alloc(mm_cachep, GFP_KERNEL))
 #define free_mm(mm)    (kmem_cache_free(mm_cachep, (mm)))
 
+static unsigned long default_dump_filter = MMF_DUMP_FILTER_DEFAULT;
+
+static int __init coredump_filter_setup(char *s)
+{
+       default_dump_filter =
+               (simple_strtoul(s, NULL, 0) << MMF_DUMP_FILTER_SHIFT) &
+               MMF_DUMP_FILTER_MASK;
+       return 1;
+}
+
+__setup("coredump_filter=", coredump_filter_setup);
+
 #include <linux/init_task.h>
 
 static struct mm_struct * mm_init(struct mm_struct * mm, struct task_struct *p)
@@ -408,15 +420,14 @@ static struct mm_struct * mm_init(struct mm_struct * mm, struct task_struct *p)
        atomic_set(&mm->mm_count, 1);
        init_rwsem(&mm->mmap_sem);
        INIT_LIST_HEAD(&mm->mmlist);
-       mm->flags = (current->mm) ? current->mm->flags
-                                 : MMF_DUMP_FILTER_DEFAULT;
+       mm->flags = (current->mm) ? current->mm->flags : default_dump_filter;
        mm->core_state = NULL;
        mm->nr_ptes = 0;
        set_mm_counter(mm, file_rss, 0);
        set_mm_counter(mm, anon_rss, 0);
        spin_lock_init(&mm->page_table_lock);
-       rwlock_init(&mm->ioctx_list_lock);
-       mm->ioctx_list = NULL;
+       spin_lock_init(&mm->ioctx_lock);
+       INIT_HLIST_HEAD(&mm->ioctx_list);
        mm->free_area_cache = TASK_UNMAPPED_BASE;
        mm->cached_hole_size = ~0UL;
        mm_init_owner(mm, p);
@@ -758,7 +769,7 @@ static int copy_sighand(unsigned long clone_flags, struct task_struct *tsk)
 {
        struct sighand_struct *sig;
 
-       if (clone_flags & (CLONE_SIGHAND | CLONE_THREAD)) {
+       if (clone_flags & CLONE_SIGHAND) {
                atomic_inc(&current->sighand->count);
                return 0;
        }