From: Breno Leitao Date: Mon, 5 Jun 2017 14:40:59 +0000 (-0300) Subject: powerpc/kernel: Initialize load_tm on task creation X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7f22ced4377628074e2ac25f41a88f98eb3b03f1;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git powerpc/kernel: Initialize load_tm on task creation 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") Cc: stable@vger.kernel.org # v4.9+ Signed-off-by: Breno Leitao Signed-off-by: Michael Ellerman --- diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index a9435397eab8..2ad725ef4368 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -1687,6 +1687,7 @@ 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);