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| author | Mark Rutland <mark.rutland@arm.com> | 2021-05-20 13:50:28 +0200 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-05-26 23:45:46 +0200 |
| commit | 98c7a1666ee94af59a65f2787a887a05a546d163 (patch) | |
| tree | 4593c8a9fe235fb44729353663ab557769d951ae /arch/arm64/kernel/smp.c | |
| parent | arm64: assembler: add set_this_cpu_offset (diff) | |
| download | linux-98c7a1666ee94af59a65f2787a887a05a546d163.tar.xz linux-98c7a1666ee94af59a65f2787a887a05a546d163.zip | |
arm64: smp: remove pointless secondary_data maintenance
All reads and writes of secondary_data occur with the MMU on, using
coherent attributes, so there's no need to perform any cache maintenance
for this.
There should be no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Suzuki Poulose <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20210520115031.18509-4-mark.rutland@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/kernel/smp.c')
| -rw-r--r-- | arch/arm64/kernel/smp.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index dcd7041b2b07..92e83e8bac94 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -122,7 +122,6 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle) secondary_data.task = idle; secondary_data.stack = task_stack_page(idle) + THREAD_SIZE; update_cpu_boot_status(CPU_MMU_OFF); - __flush_dcache_area(&secondary_data, sizeof(secondary_data)); /* Now bring the CPU into our world */ ret = boot_secondary(cpu, idle); @@ -143,7 +142,6 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle) pr_crit("CPU%u: failed to come online\n", cpu); secondary_data.task = NULL; secondary_data.stack = NULL; - __flush_dcache_area(&secondary_data, sizeof(secondary_data)); status = READ_ONCE(secondary_data.status); if (status == CPU_MMU_OFF) status = READ_ONCE(__early_cpu_boot_status); |