commit af4355e91f15812df8608925738c91be57c580dd
author Oleg Nesterov <oleg@redhat.com> Mon Dec 31 18:37:11 2012 +0100
committer Oleg Nesterov <oleg@redhat.com> Fri Feb 08 17:47:13 2013 +0100
tree d50a8fb2a2240f00e8d72a804de237552d7f1b36
parent 608e7427c0a06de0d70374a9fd7defc8eb228b7e

uprobes: Kill the bogus IS_ERR_VALUE(xol_vaddr) check

utask->xol_vaddr is either zero or valid, remove the bogus
IS_ERR_VALUE() check in xol_free_insn_slot().

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

kernel/events/uprobes.c

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 071edcb..f6c7062 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -1223,8 +1223,7 @@
 		return;
 
 	slot_addr = tsk->utask->xol_vaddr;
-
-	if (unlikely(!slot_addr || IS_ERR_VALUE(slot_addr)))
+	if (unlikely(!slot_addr))
 		return;
 
 	area = tsk->mm->uprobes_state.xol_area;