[MIPS] FPU affinity for MT ASE.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index 8b393df460a2..199a06e873c6 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -185,6 +185,17 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
         childregs->cp0_status &= ~(ST0_CU2|ST0_CU1);
         clear_tsk_thread_flag(p, TIF_USEDFPU);
 
+#ifdef CONFIG_MIPS_MT_FPAFF
+        /*
+         * FPU affinity support is cleaner if we track the
+         * user-visible CPU affinity from the very beginning.
+         * The generic cpus_allowed mask will already have
+         * been copied from the parent before copy_thread
+         * is invoked.
+         */
+        p->thread.user_cpus_allowed = p->cpus_allowed;
+#endif /* CONFIG_MIPS_MT_FPAFF */
+
         if (clone_flags & CLONE_SETTLS)
                 ti->tp_value = regs->regs[7];