[patch V3 10/32] x86/cpu_entry_area: Cleanup setup functions

Thomas Gleixner
2019-04-14T16:02:38Z

No point in retrieving the entry area pointer over and over. Do it once and
use unsigned int for 'cpu' everywhere.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
arch/x86/mm/cpu_entry_area.c | 19 +++++++++----------
1 file changed, 9 insertions(+), 10 deletions(-)

--- a/arch/x86/mm/cpu_entry_area.c
+++ b/arch/x86/mm/cpu_entry_area.c
@@ -52,10 +52,10 @@ cea_map_percpu_pages(void *cea_vaddr, vo
cea_set_pte(cea_vaddr, per_cpu_ptr_to_phys(ptr), prot);
}

-static void __init percpu_setup_debug_store(int cpu)
+static void __init percpu_setup_debug_store(unsigned int cpu)
{
#ifdef CONFIG_CPU_SUP_INTEL
- int npages;
+ unsigned int npages;
void *cea;

if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL)
@@ -79,8 +79,9 @@ static void __init percpu_setup_debug_st
}

/* Setup the fixmap mappings only once per-processor */
-static void __init setup_cpu_entry_area(int cpu)
+static void __init setup_cpu_entry_area(unsigned int cpu)
{
+ struct cpu_entry_area *cea = get_cpu_entry_area(cpu);
#ifdef CONFIG_X86_64
/* On 64-bit systems, we use a read-only fixmap GDT and TSS. */
pgprot_t gdt_prot = PAGE_KERNEL_RO;
@@ -101,10 +102,9 @@ static void __init setup_cpu_entry_area(
pgprot_t tss_prot = PAGE_KERNEL;
#endif

- cea_set_pte(&get_cpu_entry_area(cpu)->gdt, get_cpu_gdt_paddr(cpu),
- gdt_prot);
+ cea_set_pte(&cea->gdt, get_cpu_gdt_paddr(cpu), gdt_prot);

- cea_map_percpu_pages(&get_cpu_entry_area(cpu)->entry_stack_page,
+ cea_map_percpu_pages(&cea->entry_stack_page,
per_cpu_ptr(&entry_stack_storage, cpu), 1,
PAGE_KERNEL);

@@ -128,19 +128,18 @@ static void __init setup_cpu_entry_area(
BUILD_BUG_ON((offsetof(struct tss_struct, x86_tss) ^
offsetofend(struct tss_struct, x86_tss)) & PAGE_MASK);
BUILD_BUG_ON(sizeof(struct tss_struct) % PAGE_SIZE != 0);
- cea_map_percpu_pages(&get_cpu_entry_area(cpu)->tss,
- &per_cpu(cpu_tss_rw, cpu),
+ cea_map_percpu_pages(&cea->tss, &per_cpu(cpu_tss_rw, cpu),
sizeof(struct tss_struct) / PAGE_SIZE, tss_prot);

#ifdef CONFIG_X86_32
- per_cpu(cpu_entry_area, cpu) = get_cpu_entry_area(cpu);
+ per_cpu(cpu_entry_area, cpu) = cea;
#endif

#ifdef CONFIG_X86_64
BUILD_BUG_ON(sizeof(exception_stacks) % PAGE_SIZE != 0);
BUILD_BUG_ON(sizeof(exception_stacks) !=
sizeof(((struct cpu_entry_area *)0)->exception_stacks));
- cea_map_percpu_pages(&get_cpu_entry_area(cpu)->exception_stacks,
+ cea_map_percpu_pages(&cea->exception_stacks,
&per_cpu(exception_stacks, cpu),
sizeof(exception_stacks) / PAGE_SIZE, PAGE_KERNEL);
#endif