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Date: Wed, 31 Aug 2016 11:44:38 +0100 From: Matt Redfearn <matt.redfearn@...tec.com> To: Ralf Baechle <ralf@...ux-mips.org> CC: <linux-mips@...ux-mips.org>, Matt Redfearn <matt.redfearn@...tec.com>, <linux-kernel@...r.kernel.org>, Thomas Gleixner <tglx@...utronix.de>, James Hogan <james.hogan@...tec.com>, Qais Yousef <qsyousef@...il.com>, Paul Burton <paul.burton@...tec.com> Subject: [PATCH 09/10] MIPS: SMP: Wrap call to mips_cpc_lock_other in mips_cm_lock_other All calls to mips_cpc_lock_other should be wrapped in mips_cm_lock_other. This only matters if the system has CM3 and is using cpu idle, since otherwise a) the CPC lock is sufficent for CM < 3 and b) any systems with CM > 3 have not been able to use cpu idle until now. Signed-off-by: Matt Redfearn <matt.redfearn@...tec.com> Reviewed-by: Paul Burton <paul.burton@...tec.com> --- arch/mips/kernel/smp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c index f95f094f36e4..78ccd5388654 100644 --- a/arch/mips/kernel/smp.c +++ b/arch/mips/kernel/smp.c @@ -192,9 +192,11 @@ void mips_smp_send_ipi_mask(const struct cpumask *mask, unsigned int action) continue; while (!cpumask_test_cpu(cpu, &cpu_coherent_mask)) { + mips_cm_lock_other(core, 0); mips_cpc_lock_other(core); write_cpc_co_cmd(CPC_Cx_CMD_PWRUP); mips_cpc_unlock_other(); + mips_cm_unlock_other(); } } } -- 2.7.4
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