[PATCH] elf_core_dump: don't take tasklist_lock

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

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 64802aa..6eb48e1 100644 (file)
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -515,7 +515,8 @@ static unsigned long randomize_stack_top(unsigned long stack_top)
 {
        unsigned int random_variable = 0;
 
-       if (current->flags & PF_RANDOMIZE) {
+       if ((current->flags & PF_RANDOMIZE) &&
+               !(current->personality & ADDR_NO_RANDOMIZE)) {
                random_variable = get_random_int() & STACK_RND_MASK;
                random_variable <<= PAGE_SHIFT;
        }
@@ -1037,10 +1038,8 @@ out_free_interp:
 out_free_file:
        sys_close(elf_exec_fileno);
 out_free_fh:
-       if (files) {
-               put_files_struct(current->files);
-               current->files = files;
-       }
+       if (files)
+               reset_files_struct(current, files);
 out_free_ph:
        kfree(elf_phdata);
        goto out;
@@ -1480,20 +1479,19 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file)
 
        if (signr) {
                struct elf_thread_status *tmp;
-               read_lock(&tasklist_lock);
+               rcu_read_lock();
                do_each_thread(g,p)
                        if (current->mm == p->mm && current != p) {
                                tmp = kzalloc(sizeof(*tmp), GFP_ATOMIC);
                                if (!tmp) {
-                                       read_unlock(&tasklist_lock);
+                                       rcu_read_unlock();
                                        goto cleanup;
                                }
-                               INIT_LIST_HEAD(&tmp->list);
                                tmp->thread = p;
                                list_add(&tmp->list, &thread_list);
                        }
                while_each_thread(g,p);
-               read_unlock(&tasklist_lock);
+               rcu_read_unlock();
                list_for_each(t, &thread_list) {
                        struct elf_thread_status *tmp;
                        int sz;