From: James Yang Date: Fri, 5 Jul 2013 19:49:43 +0000 (-0500) Subject: powerpc/booke: clear DBCR0_BT in user_disable_single_step() X-Git-Tag: firefly_0821_release~176^2~4907^2~54^2~26 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=682775b8de995d97956447730c04d2ff978d4e13;p=firefly-linux-kernel-4.4.55.git powerpc/booke: clear DBCR0_BT in user_disable_single_step() 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 Signed-off-by: Scott Wood --- diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index aedfd41d354c..01be88b7321e 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -895,7 +895,7 @@ 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.debug.dbcr0 &= ~DBCR0_IC; + task->thread.debug.dbcr0 &= ~(DBCR0_IC|DBCR0_BT); /* * Test to see if any of the DBCR_ACTIVE_EVENTS bits are set. */