From 18d7f152df31e5a326301fdaad385e40874dff80 Mon Sep 17 00:00:00 2001 From: Lorenzo Pieralisi Date: Wed, 19 Jun 2013 10:40:48 +0100 Subject: [PATCH] ARM: 7763/1: kernel: fix __cpu_logical_map default initialization The __cpu_logical_map array is statically initialized to 0, which is a valid MPIDR value. To prevent issues with the current implementation, this patch defines an MPIDR_INVALID value, and statically initializes the __cpu_logical_map[] array to it. Entries in the arm_dt_init_cpu_maps() tmp_map array used to stash DT reg properties while parsing DT are initialized with the MPIDR_INVALID value as well for consistency. Signed-off-by: Lorenzo Pieralisi Acked-by: Nicolas Pitre Cc: Will Deacon Signed-off-by: Russell King --- arch/arm/include/asm/cputype.h | 2 ++ arch/arm/include/asm/smp_plat.h | 2 +- arch/arm/kernel/devtree.c | 2 +- arch/arm/kernel/setup.c | 2 +- 4 files changed, 5 insertions(+), 3 deletions(-) diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h index 7652712d1d1..dba62cb1ad0 100644 --- a/arch/arm/include/asm/cputype.h +++ b/arch/arm/include/asm/cputype.h @@ -32,6 +32,8 @@ #define MPIDR_HWID_BITMASK 0xFFFFFF +#define MPIDR_INVALID (~MPIDR_HWID_BITMASK) + #define MPIDR_LEVEL_BITS 8 #define MPIDR_LEVEL_MASK ((1 << MPIDR_LEVEL_BITS) - 1) diff --git a/arch/arm/include/asm/smp_plat.h b/arch/arm/include/asm/smp_plat.h index aaa61b6f50f..e7898320273 100644 --- a/arch/arm/include/asm/smp_plat.h +++ b/arch/arm/include/asm/smp_plat.h @@ -49,7 +49,7 @@ static inline int cache_ops_need_broadcast(void) /* * Logical CPU mapping. */ -extern int __cpu_logical_map[]; +extern u32 __cpu_logical_map[]; #define cpu_logical_map(cpu) __cpu_logical_map[cpu] /* * Retrieve logical cpu index corresponding to a given MPIDR[23:0] diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c index 904cad5ec65..0905502bee1 100644 --- a/arch/arm/kernel/devtree.c +++ b/arch/arm/kernel/devtree.c @@ -82,7 +82,7 @@ void __init arm_dt_init_cpu_maps(void) u32 i, j, cpuidx = 1; u32 mpidr = is_smp() ? read_cpuid_mpidr() & MPIDR_HWID_BITMASK : 0; - u32 tmp_map[NR_CPUS] = { [0 ... NR_CPUS-1] = UINT_MAX }; + u32 tmp_map[NR_CPUS] = { [0 ... NR_CPUS-1] = MPIDR_INVALID }; bool bootcpu_valid = false; cpus = of_find_node_by_path("/cpus"); diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 1522c7ae31b..b4b1d397592 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -444,7 +444,7 @@ void notrace cpu_init(void) : "r14"); } -int __cpu_logical_map[NR_CPUS]; +u32 __cpu_logical_map[NR_CPUS] = { [0 ... NR_CPUS-1] = MPIDR_INVALID }; void __init smp_setup_processor_id(void) { -- 2.34.1