[RFC PATCH 08/11] powerpc/tm: Do not reclaim on ptrace
From: Breno Leitao <leitao@debian.org>
Date: 2018-09-12 19:40:59
Subsystem:
linux for powerpc (32-bit and 64-bit), ptrace support, the rest · Maintainers:
Madhavan Srinivasan, Oleg Nesterov, Linus Torvalds
Make sure that we are not suspended on ptrace and that the registers were already reclaimed. Since the data was already reclaimed, there is nothing to be done here except to restore the SPRs. Signed-off-by: Breno Leitao <leitao@debian.org> --- arch/powerpc/kernel/ptrace.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 9667666eb18e..cf6ee9154b11 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c@@ -136,12 +136,10 @@ static void flush_tmregs_to_thread(struct task_struct *tsk) if ((!cpu_has_feature(CPU_FTR_TM)) || (tsk != current)) return; - if (MSR_TM_SUSPENDED(mfmsr())) { - tm_reclaim_current(TM_CAUSE_SIGNAL); - } else { - tm_enable(); - tm_save_sprs(&(tsk->thread)); - } + WARN_ON(MSR_TM_SUSPENDED(mfmsr())); + + tm_enable(); + tm_save_sprs(&(tsk->thread)); } #else static inline void flush_tmregs_to_thread(struct task_struct *tsk) { }
--
2.19.0