MIPS: Fix IRQ tracing when call handle_fpe() and handle_msa_fpe()

[ Upstream commit 31e1b3efa802f97a17628dde280006c4cee4ce5e ]

Register "a1" is unsaved in this function,
 when CONFIG_TRACE_IRQFLAGS is enabled,
 the TRACE_IRQS_OFF macro will call trace_hardirqs_off(),
 and this may change register "a1".
 The changed register "a1" as argument will be send
 to do_fpe() and do_msa_fpe().

Signed-off-by: YuanJunQing <yuanjunqing66@163.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/mips/kernel/genex.S b/arch/mips/kernel/genex.S
index ae810da..59ed811 100644 (file)
--- a/arch/mips/kernel/genex.S
+++ b/arch/mips/kernel/genex.S
@@ -429,20 +429,20 @@ NESTED(nmi_handler, PT_SIZE, sp)
        .endm
 
        .macro  __build_clear_fpe
+       CLI
+       TRACE_IRQS_OFF
        .set    push
        /* gas fails to assemble cfc1 for some archs (octeon).*/ \
        .set    mips1
        SET_HARDFLOAT
        cfc1    a1, fcr31
        .set    pop
-       CLI
-       TRACE_IRQS_OFF
        .endm
 
        .macro  __build_clear_msa_fpe
-       _cfcmsa a1, MSA_CSR
        CLI
        TRACE_IRQS_OFF
+       _cfcmsa a1, MSA_CSR
        .endm
 
        .macro  __build_clear_ade