smaps: extract pmd walker from smaps code

[powerpc.git] / fs / proc / base.c

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 01f7769..989af5e 100644 (file)
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1558,29 +1558,20 @@ static ssize_t proc_pid_attr_read(struct file * file, char __user * buf,
                                  size_t count, loff_t *ppos)
 {
        struct inode * inode = file->f_path.dentry->d_inode;
-       unsigned long page;
+       char *p = NULL;
        ssize_t length;
        struct task_struct *task = get_proc_task(inode);
 
-       length = -ESRCH;
        if (!task)
-               goto out_no_task;
-
-       if (count > PAGE_SIZE)
-               count = PAGE_SIZE;
-       length = -ENOMEM;
-       if (!(page = __get_free_page(GFP_KERNEL)))
-               goto out;
+               return -ESRCH;
 
        length = security_getprocattr(task,
                                      (char*)file->f_path.dentry->d_name.name,
-                                     (void*)page, count);
-       if (length >= 0)
-               length = simple_read_from_buffer(buf, count, ppos, (char *)page, length);
-       free_page(page);
-out:
+                                     &p);
        put_task_struct(task);
-out_no_task:
+       if (length > 0)
+               length = simple_read_from_buffer(buf, count, ppos, p, length);
+       kfree(p);
        return length;
 }