Commit c76662e8 authored Jul 17, 2018 by Ram Pai Committed by Michael Ellerman Jul 24, 2018

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: cf43d3b2 ("powerpc: Enable pkey subsystem")
Cc: stable@vger.kernel.org # v4.16+
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent 4a4a5e5d

arch/powerpc/kernel/process.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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)