Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (46 commits)
  powerpc64: convert to dynamic percpu allocator
  sparc64: use embedding percpu first chunk allocator
  percpu: kill lpage first chunk allocator
  x86,percpu: use embedding for 64bit NUMA and page for 32bit NUMA
  percpu: update embedding first chunk allocator to handle sparse units
  percpu: use group information to allocate vmap areas sparsely
  vmalloc: implement pcpu_get_vm_areas()
  vmalloc: separate out insert_vmalloc_vm()
  percpu: add chunk->base_addr
  percpu: add pcpu_unit_offsets[]
  percpu: introduce pcpu_alloc_info and pcpu_group_info
  percpu: move pcpu_lpage_build_unit_map() and pcpul_lpage_dump_cfg() upward
  percpu: add @align to pcpu_fc_alloc_fn_t
  percpu: make @dyn_size mandatory for pcpu_setup_first_chunk()
  percpu: drop @static_size from first chunk allocators
  percpu: generalize first chunk allocator selection
  percpu: build first chunk allocators selectively
  percpu: rename 4k first chunk allocator to page
  percpu: improve boot messages
  percpu: fix pcpu_reclaim() locking
  ...

Fix trivial conflict as by Tejun Heo in kernel/sched.c

3 files changed, 23 insertions, 119 deletions

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 2bd5c287538a..86b82348b97c 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -99,7 +99,7 @@ config AUDIT_ARCH
 config HAVE_SETUP_PER_CPU_AREA
         def_bool y if SPARC64
 
-config HAVE_DYNAMIC_PER_CPU_AREA
+config NEED_PER_CPU_EMBED_FIRST_CHUNK
         def_bool y if SPARC64
 
 config GENERIC_HARDIRQS_NO__DO_IRQ
diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c
index 3691907a43b4..ff68373ce6d6 100644
--- a/arch/sparc/kernel/smp_64.c
+++ b/arch/sparc/kernel/smp_64.c
@@ -1389,8 +1389,8 @@ void smp_send_stop(void)
  * RETURNS:
  * Pointer to the allocated area on success, NULL on failure.
  */
-static void * __init pcpu_alloc_bootmem(unsigned int cpu, unsigned long size,
-                                        unsigned long align)
+static void * __init pcpu_alloc_bootmem(unsigned int cpu, size_t size,
+                                        size_t align)
 {
         const unsigned long goal = __pa(MAX_DMA_ADDRESS);
 #ifdef CONFIG_NEED_MULTIPLE_NODES
@@ -1415,127 +1415,35 @@ static void * __init pcpu_alloc_bootmem(unsigned int cpu, unsigned long size,
 #endif
 }
 
-static size_t pcpur_size __initdata;
-static void **pcpur_ptrs __initdata;
-
-static struct page * __init pcpur_get_page(unsigned int cpu, int pageno)
+static void __init pcpu_free_bootmem(void *ptr, size_t size)
 {
-        size_t off = (size_t)pageno << PAGE_SHIFT;
-
-        if (off >= pcpur_size)
-                return NULL;
-
-        return virt_to_page(pcpur_ptrs[cpu] + off);
+        free_bootmem(__pa(ptr), size);
 }
 
-#define PCPU_CHUNK_SIZE (4UL * 1024UL * 1024UL)
-
-static void __init pcpu_map_range(unsigned long start, unsigned long end,
-                                  struct page *page)
+static int pcpu_cpu_distance(unsigned int from, unsigned int to)
 {
-        unsigned long pfn = page_to_pfn(page);
-        unsigned long pte_base;
-
-        BUG_ON((pfn<<PAGE_SHIFT)&(PCPU_CHUNK_SIZE - 1UL));
-
-        pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4U |
-                    _PAGE_CP_4U | _PAGE_CV_4U |
-                    _PAGE_P_4U | _PAGE_W_4U);
-        if (tlb_type == hypervisor)
-                pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4V |
-                            _PAGE_CP_4V | _PAGE_CV_4V |
-                            _PAGE_P_4V | _PAGE_W_4V);
-
-        while (start < end) {
-                pgd_t *pgd = pgd_offset_k(start);
-                unsigned long this_end;
-                pud_t *pud;
-                pmd_t *pmd;
-                pte_t *pte;
-
-                pud = pud_offset(pgd, start);
-                if (pud_none(*pud)) {
-                        pmd_t *new;
-
-                        new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
-                        pud_populate(&init_mm, pud, new);
-                }
-
-                pmd = pmd_offset(pud, start);
-                if (!pmd_present(*pmd)) {
-                        pte_t *new;
-
-                        new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
-                        pmd_populate_kernel(&init_mm, pmd, new);
-                }
-
-                pte = pte_offset_kernel(pmd, start);
-                this_end = (start + PMD_SIZE) & PMD_MASK;
-                if (this_end > end)
-                        this_end = end;
-
-                while (start < this_end) {
-                        unsigned long paddr = pfn << PAGE_SHIFT;
-
-                        pte_val(*pte) = (paddr | pte_base);
-
-                        start += PAGE_SIZE;
-                        pte++;
-                        pfn++;
-                }
-        }
+        if (cpu_to_node(from) == cpu_to_node(to))
+                return LOCAL_DISTANCE;
+        else
+                return REMOTE_DISTANCE;
 }
 
 void __init setup_per_cpu_areas(void)
 {
-        size_t dyn_size, static_size = __per_cpu_end - __per_cpu_start;
-        static struct vm_struct vm;
-        unsigned long delta, cpu;
-        size_t pcpu_unit_size;
-        size_t ptrs_size;
-
-        pcpur_size = PFN_ALIGN(static_size + PERCPU_MODULE_RESERVE +
-                               PERCPU_DYNAMIC_RESERVE);
-        dyn_size = pcpur_size - static_size - PERCPU_MODULE_RESERVE;
-
+        unsigned long delta;
+        unsigned int cpu;
+        int rc;
 
-        ptrs_size = PFN_ALIGN(nr_cpu_ids * sizeof(pcpur_ptrs[0]));
-        pcpur_ptrs = alloc_bootmem(ptrs_size);
-
-        for_each_possible_cpu(cpu) {
-                pcpur_ptrs[cpu] = pcpu_alloc_bootmem(cpu, PCPU_CHUNK_SIZE,
-                                                     PCPU_CHUNK_SIZE);
-
-                free_bootmem(__pa(pcpur_ptrs[cpu] + pcpur_size),
-                             PCPU_CHUNK_SIZE - pcpur_size);
-
-                memcpy(pcpur_ptrs[cpu], __per_cpu_load, static_size);
-        }
-
-        /* allocate address and map */
-        vm.flags = VM_ALLOC;
-        vm.size = nr_cpu_ids * PCPU_CHUNK_SIZE;
-        vm_area_register_early(&vm, PCPU_CHUNK_SIZE);
-
-        for_each_possible_cpu(cpu) {
-                unsigned long start = (unsigned long) vm.addr;
-                unsigned long end;
-
-                start += cpu * PCPU_CHUNK_SIZE;
-                end = start + PCPU_CHUNK_SIZE;
-                pcpu_map_range(start, end, virt_to_page(pcpur_ptrs[cpu]));
-        }
-
-        pcpu_unit_size = pcpu_setup_first_chunk(pcpur_get_page, static_size,
-                                                PERCPU_MODULE_RESERVE, dyn_size,
-                                                PCPU_CHUNK_SIZE, vm.addr, NULL);
-
-        free_bootmem(__pa(pcpur_ptrs), ptrs_size);
+        rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
+                                    PERCPU_DYNAMIC_RESERVE, 4 << 20,
+                                    pcpu_cpu_distance, pcpu_alloc_bootmem,
+                                    pcpu_free_bootmem);
+        if (rc)
+                panic("failed to initialize first chunk (%d)", rc);
 
         delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start;
-        for_each_possible_cpu(cpu) {
-                __per_cpu_offset(cpu) = delta + cpu * pcpu_unit_size;
-        }
+        for_each_possible_cpu(cpu)
+                __per_cpu_offset(cpu) = delta + pcpu_unit_offsets[cpu];
 
         /* Setup %g5 for the boot cpu.  */
         __local_per_cpu_offset = __per_cpu_offset(smp_processor_id());
diff --git a/arch/sparc/kernel/vmlinux.lds.S b/arch/sparc/kernel/vmlinux.lds.S
index fcbbd000ec08..866390feb683 100644
--- a/arch/sparc/kernel/vmlinux.lds.S
+++ b/arch/sparc/kernel/vmlinux.lds.S
@@ -171,12 +171,8 @@ SECTIONS
         }
         _end = . ;
 
-        /DISCARD/ : {
-                EXIT_TEXT
-                EXIT_DATA
-                *(.exitcall.exit)
-        }
-
         STABS_DEBUG
         DWARF_DEBUG
+
+        DISCARDS
 }