[PATCH] autofs4: need to invalidate children on tree mount expire

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

diff --git a/kernel/fork.c b/kernel/fork.c
index ac8100e3088a1f6d99d8ad640a70a3de5ec96e5e..49adc0e8d47ccf3b51af4e5b32ffd4210aeaf955 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -368,6 +368,8 @@ void fastcall __mmdrop(struct mm_struct *mm)
  */
 void mmput(struct mm_struct *mm)
 {
+       might_sleep();
+
        if (atomic_dec_and_test(&mm->mm_users)) {
                exit_aio(mm);
                exit_mmap(mm);
@@ -623,6 +625,7 @@ out:
 /*
  * Allocate a new files structure and copy contents from the
  * passed in files structure.
+ * errorp will be valid only when the returned files_struct is NULL.
  */
 static struct files_struct *dup_fd(struct files_struct *oldf, int *errorp)
 {
@@ -631,6 +634,7 @@ static struct files_struct *dup_fd(struct files_struct *oldf, int *errorp)
        int open_files, size, i, expand;
        struct fdtable *old_fdt, *new_fdt;
 
+       *errorp = -ENOMEM;
        newf = alloc_files();
        if (!newf)
                goto out;
@@ -744,7 +748,6 @@ static int copy_files(unsigned long clone_flags, struct task_struct * tsk)
         * break this.
         */
        tsk->files = NULL;
-       error = -ENOMEM;
        newf = dup_fd(oldf, &error);
        if (!newf)
                goto out;