MIPS: CMP/SMTC: Fix tc_id calculation

Currently the tc_id code is:

  (read_c0_tcbind() >> TCBIND_CURTC_SHIFT) & TCBIND_CURTC;

After processing this becomes:

  (read_c0_tcbind() >> 21) & ((0xff) << 21)

But it should be:

  (read_c0_tcbind() & ((0xff)<< 21)) >> 21

Signed-off-by: RongQing.Li <roy.qing.li@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/4077/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/kernel/smp-cmp.c b/arch/mips/kernel/smp-cmp.c
index e7e03ecf54959988e029e81783422fa0c5b78554..afc379ca375301f7e916a4fd46447239ad478a38 100644 (file)
--- a/arch/mips/kernel/smp-cmp.c
+++ b/arch/mips/kernel/smp-cmp.c
@@ -102,7 +102,7 @@ static void cmp_init_secondary(void)
        c->vpe_id = (read_c0_tcbind() >> TCBIND_CURVPE_SHIFT) & TCBIND_CURVPE;
 #endif
 #ifdef CONFIG_MIPS_MT_SMTC
-       c->tc_id  = (read_c0_tcbind() >> TCBIND_CURTC_SHIFT) & TCBIND_CURTC;
+       c->tc_id  = (read_c0_tcbind() & TCBIND_CURTC) >> TCBIND_CURTC_SHIFT;
 #endif
 }