diff options
| author | Suzuki K. Poulose <suzuki.poulose@arm.com> | 2015-10-19 14:24:40 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2015-10-21 15:33:39 +0100 |
| commit | 4b998ff1885eecd3dc330bf057e24667c1db84a4 (patch) | |
| tree | 68ab5a9fb53c6ab4ad143727e4df6d7c4903798c /arch/arm64/kernel | |
| parent | 3a75578efae64b94d76eacbf8adf2a3ab13c6aa1 (diff) | |
arm64: Delay cpuinfo_store_boot_cpu
At the moment the boot CPU stores the cpuinfo long before the
PERCPU areas are initialised by the kernel. This could be problematic
as the non-boot CPU data structures might get copied with the data
from the boot CPU, giving us no chance to detect if a particular CPU
updated its cpuinfo. This patch delays the boot cpu store to
smp_prepare_boot_cpu().
Also kills the setup_processor() which no longer does meaningful
work.
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Tested-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/setup.c | 10 | ||||
| -rw-r--r-- | arch/arm64/kernel/smp.c | 1 |
2 files changed, 3 insertions, 8 deletions
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index 4f0408e1df0d..47e005141598 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -286,13 +286,6 @@ void __init setup_cpu_features(void) #endif } -static void __init setup_processor(void) -{ - pr_info("Boot CPU: AArch64 Processor [%08x]\n", read_cpuid_id()); - sprintf(init_utsname()->machine, ELF_PLATFORM); - cpuinfo_store_boot_cpu(); -} - static void __init setup_machine_fdt(phys_addr_t dt_phys) { void *dt_virt = fixmap_remap_fdt(dt_phys); @@ -404,8 +397,9 @@ u64 __cpu_logical_map[NR_CPUS] = { [0 ... NR_CPUS-1] = INVALID_HWID }; void __init setup_arch(char **cmdline_p) { - setup_processor(); + pr_info("Boot CPU: AArch64 Processor [%08x]\n", read_cpuid_id()); + sprintf(init_utsname()->machine, ELF_PLATFORM); init_mm.start_code = (unsigned long) _text; init_mm.end_code = (unsigned long) _etext; init_mm.end_data = (unsigned long) _edata; diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 77763d9cb510..d1d00499f0cf 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -327,6 +327,7 @@ void __init smp_cpus_done(unsigned int max_cpus) void __init smp_prepare_boot_cpu(void) { + cpuinfo_store_boot_cpu(); set_my_cpu_offset(per_cpu_offset(smp_processor_id())); } |