Commit 31e1b3ef authored May 27, 2020 by YuanJunQing Committed by Thomas Bogendoerfer May 27, 2020

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



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>

parent 273b5fa0

arch/mips/kernel/genex.S

+3 −3

Original line number	Diff line number	Diff line
		@@ -476,20 +476,20 @@ 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

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