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>

1 files changed, 10 insertions, 0 deletions

diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 00263bf07a88..8b1a0ef7f874 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -137,6 +137,16 @@ static pte_t * __init one_page_table_init(pmd_t *pmd)
         return pte_offset_kernel(pmd, 0);
 }
 
+void __init populate_extra_pte(unsigned long vaddr)
+{
+        int pgd_idx = pgd_index(vaddr);
+        int pmd_idx = pmd_index(vaddr);
+        pmd_t *pmd;
+
+        pmd = one_md_table_init(swapper_pg_dir + pgd_idx);
+        one_page_table_init(pmd + pmd_idx);
+}
+
 static pte_t *__init page_table_kmap_check(pte_t *pte, pmd_t *pmd,
                                            unsigned long vaddr, pte_t *lastpte)
 {