x86: convert to the new dynamic percpu allocator
Impact: use new dynamic allocator, unified access to static/dynamic
percpu memory
Convert to the new dynamic percpu allocator.
* implement populate_extra_pte() for both 32 and 64
* update setup_per_cpu_areas() to use pcpu_setup_static()
* define __addr_to_pcpu_ptr() and __pcpu_ptr_to_addr()
* define config HAVE_DYNAMIC_PER_CPU_AREA
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index e6d36b4..7f91e2c 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -223,6 +223,25 @@
set_pte_vaddr_pud(pud_page, vaddr, pteval);
}
+void __init populate_extra_pte(unsigned long vaddr)
+{
+ pgd_t *pgd;
+ pud_t *pud;
+
+ pgd = pgd_offset_k(vaddr);
+ if (pgd_none(*pgd)) {
+ pud = (pud_t *)spp_getpage();
+ pgd_populate(&init_mm, pgd, pud);
+ if (pud != pud_offset(pgd, 0)) {
+ printk(KERN_ERR "PAGETABLE BUG #00! %p <-> %p\n",
+ pud, pud_offset(pgd, 0));
+ return;
+ }
+ }
+
+ set_pte_vaddr_pud((pud_t *)pgd_page_vaddr(*pgd), vaddr, __pte(0));
+}
+
/*
* Create large page table mappings for a range of physical addresses.
*/