From: Ram Pai Date: Tue, 17 Jul 2018 13:51:05 +0000 (-0700) Subject: powerpc/pkeys: Save the pkey registers before fork X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c76662e825f507b98938dc3bb141c4505bd4968c;p=linux.git powerpc/pkeys: Save the pkey registers before fork When a thread forks the contents of AMR, IAMR, UAMOR registers in the newly forked thread are not inherited. Save the registers before forking, for content of those registers to be automatically copied into the new thread. Fixes: cf43d3b26452 ("powerpc: Enable pkey subsystem") Cc: stable@vger.kernel.org # v4.16+ Signed-off-by: Ram Pai Signed-off-by: Michael Ellerman --- diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 27f0caee55ea7..eca92aac2e175 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -583,6 +583,7 @@ static void save_all(struct task_struct *tsk) __giveup_spe(tsk); msr_check_and_clear(msr_all_available); + thread_pkey_regs_save(&tsk->thread); } void flush_all_to_thread(struct task_struct *tsk)