From 2c8656204742a5e2d373972b139d0cc26ae93ff0 Mon Sep 17 00:00:00 2001 From: Thomas Bogendoerfer Date: Tue, 19 Feb 2019 16:57:19 +0100 Subject: [PATCH] MIPS: SGI-IP27: do boot CPU init later To make use of per_cpu variables in interrupt code per_cpu_init() must be done after setup_per_cpu_areas(). This is achieved by calling it in smp_prepare_boot_cpu() via a new smp_ops method. Signed-off-by: Thomas Bogendoerfer Signed-off-by: Paul Burton Cc: Ralf Baechle Cc: James Hogan Cc: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org --- arch/mips/include/asm/smp-ops.h | 1 + arch/mips/kernel/smp.c | 2 ++ arch/mips/sgi-ip27/ip27-init.c | 1 - arch/mips/sgi-ip27/ip27-smp.c | 5 +++-- 4 files changed, 6 insertions(+), 3 deletions(-) diff --git a/arch/mips/include/asm/smp-ops.h b/arch/mips/include/asm/smp-ops.h index b7123f9..65618ff 100644 --- a/arch/mips/include/asm/smp-ops.h +++ b/arch/mips/include/asm/smp-ops.h @@ -29,6 +29,7 @@ struct plat_smp_ops { int (*boot_secondary)(int cpu, struct task_struct *idle); void (*smp_setup)(void); void (*prepare_cpus)(unsigned int max_cpus); + void (*prepare_boot_cpu)(void); #ifdef CONFIG_HOTPLUG_CPU int (*cpu_disable)(void); void (*cpu_die)(unsigned int cpu); diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c index 6fd9e94..bc4bb3c 100644 --- a/arch/mips/kernel/smp.c +++ b/arch/mips/kernel/smp.c @@ -444,6 +444,8 @@ void __init smp_prepare_cpus(unsigned int max_cpus) /* preload SMP state for boot cpu */ void smp_prepare_boot_cpu(void) { + if (mp_ops->prepare_boot_cpu) + mp_ops->prepare_boot_cpu(); set_cpu_possible(0, true); set_cpu_online(0, true); } diff --git a/arch/mips/sgi-ip27/ip27-init.c b/arch/mips/sgi-ip27/ip27-init.c index aba985c..e6fa9d0 100644 --- a/arch/mips/sgi-ip27/ip27-init.c +++ b/arch/mips/sgi-ip27/ip27-init.c @@ -212,7 +212,6 @@ void __init plat_mem_setup(void) #endif ioc3_eth_init(); - per_cpu_init(); set_io_port_base(IO_BASE); } diff --git a/arch/mips/sgi-ip27/ip27-smp.c b/arch/mips/sgi-ip27/ip27-smp.c index 545446d..20b8120 100644 --- a/arch/mips/sgi-ip27/ip27-smp.c +++ b/arch/mips/sgi-ip27/ip27-smp.c @@ -177,7 +177,7 @@ static void ip27_send_ipi_mask(const struct cpumask *mask, unsigned int action) ip27_send_ipi_single(i, action); } -static void ip27_init_secondary(void) +static void ip27_init_cpu(void) { per_cpu_init(); } @@ -235,9 +235,10 @@ static void __init ip27_prepare_cpus(unsigned int max_cpus) const struct plat_smp_ops ip27_smp_ops = { .send_ipi_single = ip27_send_ipi_single, .send_ipi_mask = ip27_send_ipi_mask, - .init_secondary = ip27_init_secondary, + .init_secondary = ip27_init_cpu, .smp_finish = ip27_smp_finish, .boot_secondary = ip27_boot_secondary, .smp_setup = ip27_smp_setup, .prepare_cpus = ip27_prepare_cpus, + .prepare_boot_cpu = ip27_init_cpu, }; -- 2.7.4