uprobes: Kill the unnecesary filp != NULL check in __copy_insn()

__copy_insn(filp) can only be called after valid_vma() returns T,
vma->vm_file passed as "filp" can not be NULL.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Anton Arapov <anton@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index ba6acfe..0938665 100644 (file)
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -501,9 +501,6 @@ __copy_insn(struct address_space *mapping, struct file *filp, char *insn,
 {
        struct page *page;
 
-       if (!filp)
-               return -EINVAL;
-
        if (!mapping->a_ops->readpage)
                return -EIO;
        /*