[PATCH] powerpc/booke: clear DBCR0_BT in user_disable_single_step()

[James Yang]

BookE version of user_disable_single_step() clears DBCR0_IC for the
instruction completion debug, but did not also clear DBCR0_BT for the
branch taken exception.  This behavior was lost by the 2/2010 patch.

Signed-off-by: James Yang <James.Yang at freescale.com>
---
 arch/powerpc/kernel/ptrace.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 98c2fc1..c634970 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -894,7 +894,7 @@ void user_disable_single_step(struct task_struct *task)
 		 * And, after doing so, if all debug flags are off, turn
 		 * off DBCR0(IDM) and MSR(DE) .... Torez
 		 */
-		task->thread.dbcr0 &= ~DBCR0_IC;
+		task->thread.dbcr0 &= ~(DBCR0_IC|DBCR0_BT);
 		/*
 		 * Test to see if any of the DBCR_ACTIVE_EVENTS bits are set.
 		 */
-- 
1.7.0.4