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-rw-r--r--fs/proc/base.c51
1 files changed, 0 insertions, 51 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index dc8bca72b002..c2ac2fb123c8 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1576,57 +1576,6 @@ static const struct file_operations proc_pid_set_comm_operations = {
1576 .release = single_release, 1576 .release = single_release,
1577}; 1577};
1578 1578
1579/*
1580 * We added or removed a vma mapping the executable. The vmas are only mapped
1581 * during exec and are not mapped with the mmap system call.
1582 * Callers must hold down_write() on the mm's mmap_sem for these
1583 */
1584void added_exe_file_vma(struct mm_struct *mm)
1585{
1586 mm->num_exe_file_vmas++;
1587}
1588
1589void removed_exe_file_vma(struct mm_struct *mm)
1590{
1591 mm->num_exe_file_vmas--;
1592 if ((mm->num_exe_file_vmas == 0) && mm->exe_file){
1593 fput(mm->exe_file);
1594 mm->exe_file = NULL;
1595 }
1596
1597}
1598
1599void set_mm_exe_file(struct mm_struct *mm, struct file *new_exe_file)
1600{
1601 if (new_exe_file)
1602 get_file(new_exe_file);
1603 if (mm->exe_file)
1604 fput(mm->exe_file);
1605 mm->exe_file = new_exe_file;
1606 mm->num_exe_file_vmas = 0;
1607}
1608
1609struct file *get_mm_exe_file(struct mm_struct *mm)
1610{
1611 struct file *exe_file;
1612
1613 /* We need mmap_sem to protect against races with removal of
1614 * VM_EXECUTABLE vmas */
1615 down_read(&mm->mmap_sem);
1616 exe_file = mm->exe_file;
1617 if (exe_file)
1618 get_file(exe_file);
1619 up_read(&mm->mmap_sem);
1620 return exe_file;
1621}
1622
1623void dup_mm_exe_file(struct mm_struct *oldmm, struct mm_struct *newmm)
1624{
1625 /* It's safe to write the exe_file pointer without exe_file_lock because
1626 * this is called during fork when the task is not yet in /proc */
1627 newmm->exe_file = get_mm_exe_file(oldmm);
1628}
1629
1630static int proc_exe_link(struct inode *inode, struct path *exe_path) 1579static int proc_exe_link(struct inode *inode, struct path *exe_path)
1631{ 1580{
1632 struct task_struct *task; 1581 struct task_struct *task;