From 3df116ce53bf8434e04afb93d17aa8423eaaa8dc Mon Sep 17 00:00:00 2001 From: Breno Leitao Date: Mon, 5 Jun 2017 11:40:59 -0300 Subject: [PATCH] powerpc/kernel: Initialize load_tm on task creation commit 7f22ced4377628074e2ac25f41a88f98eb3b03f1 upstream. Currently tsk->thread.load_tm is not initialized in the task creation and can contain garbage on a new task. This is an undesired behaviour, since it affects the timing to enable and disable the transactional memory laziness (disabling and enabling the MSR TM bit, which affects TM reclaim and recheckpoint in the scheduling process). Fixes: 5d176f751ee3 ("powerpc: tm: Enable transactional memory (TM) lazily for userspace") Signed-off-by: Breno Leitao Signed-off-by: Michael Ellerman Signed-off-by: Greg Kroah-Hartman --- arch/powerpc/kernel/process.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 09a4293fefa7..b5ff31acab30 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -1682,6 +1682,7 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp) current->thread.tm_tfhar = 0; current->thread.tm_texasr = 0; current->thread.tm_tfiar = 0; + current->thread.load_tm = 0; #endif /* CONFIG_PPC_TRANSACTIONAL_MEM */ } EXPORT_SYMBOL(start_thread); -- 2.30.2