1 files changed, 75 insertions, 13 deletions

diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 26fd9d12f050..878836ca999c 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -34,7 +34,7 @@
 
 #ifdef CONFIG_SMP
 
-#ifdef CONFIG_HAVE_DYNAMIC_PER_CPU_AREA
+#ifndef CONFIG_HAVE_LEGACY_PER_CPU_AREA
 
 /* minimum unit size, also is the maximum supported allocation size */
 #define PCPU_MIN_UNIT_SIZE              PFN_ALIGN(64 << 10)
@@ -57,19 +57,70 @@
 #endif
 
 extern void *pcpu_base_addr;
+extern const unsigned long *pcpu_unit_offsets;
 
-typedef struct page * (*pcpu_get_page_fn_t)(unsigned int cpu, int pageno);
-typedef void (*pcpu_populate_pte_fn_t)(unsigned long addr);
+struct pcpu_group_info {
+        int                     nr_units;       /* aligned # of units */
+        unsigned long           base_offset;    /* base address offset */
+        unsigned int            *cpu_map;       /* unit->cpu map, empty
+                                                 * entries contain NR_CPUS */
+};
+
+struct pcpu_alloc_info {
+        size_t                  static_size;
+        size_t                  reserved_size;
+        size_t                  dyn_size;
+        size_t                  unit_size;
+        size_t                  atom_size;
+        size_t                  alloc_size;
+        size_t                  __ai_size;      /* internal, don't use */
+        int                     nr_groups;      /* 0 if grouping unnecessary */
+        struct pcpu_group_info  groups[];
+};
 
-extern size_t __init pcpu_setup_first_chunk(pcpu_get_page_fn_t get_page_fn,
-                                size_t static_size, size_t reserved_size,
-                                ssize_t dyn_size, ssize_t unit_size,
-                                void *base_addr,
-                                pcpu_populate_pte_fn_t populate_pte_fn);
+enum pcpu_fc {
+        PCPU_FC_AUTO,
+        PCPU_FC_EMBED,
+        PCPU_FC_PAGE,
 
-extern ssize_t __init pcpu_embed_first_chunk(
-                                size_t static_size, size_t reserved_size,
-                                ssize_t dyn_size, ssize_t unit_size);
+        PCPU_FC_NR,
+};
+extern const char *pcpu_fc_names[PCPU_FC_NR];
+
+extern enum pcpu_fc pcpu_chosen_fc;
+
+typedef void * (*pcpu_fc_alloc_fn_t)(unsigned int cpu, size_t size,
+                                     size_t align);
+typedef void (*pcpu_fc_free_fn_t)(void *ptr, size_t size);
+typedef void (*pcpu_fc_populate_pte_fn_t)(unsigned long addr);
+typedef int (pcpu_fc_cpu_distance_fn_t)(unsigned int from, unsigned int to);
+
+extern struct pcpu_alloc_info * __init pcpu_alloc_alloc_info(int nr_groups,
+                                                             int nr_units);
+extern void __init pcpu_free_alloc_info(struct pcpu_alloc_info *ai);
+
+extern struct pcpu_alloc_info * __init pcpu_build_alloc_info(
+                                size_t reserved_size, ssize_t dyn_size,
+                                size_t atom_size,
+                                pcpu_fc_cpu_distance_fn_t cpu_distance_fn);
+
+extern int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
+                                         void *base_addr);
+
+#ifdef CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK
+extern int __init pcpu_embed_first_chunk(size_t reserved_size, ssize_t dyn_size,
+                                size_t atom_size,
+                                pcpu_fc_cpu_distance_fn_t cpu_distance_fn,
+                                pcpu_fc_alloc_fn_t alloc_fn,
+                                pcpu_fc_free_fn_t free_fn);
+#endif
+
+#ifdef CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK
+extern int __init pcpu_page_first_chunk(size_t reserved_size,
+                                pcpu_fc_alloc_fn_t alloc_fn,
+                                pcpu_fc_free_fn_t free_fn,
+                                pcpu_fc_populate_pte_fn_t populate_pte_fn);
+#endif
 
 /*
  * Use this to get to a cpu's version of the per-cpu object
@@ -80,7 +131,7 @@ extern ssize_t __init pcpu_embed_first_chunk(
 
 extern void *__alloc_reserved_percpu(size_t size, size_t align);
 
-#else /* CONFIG_HAVE_DYNAMIC_PER_CPU_AREA */
+#else /* CONFIG_HAVE_LEGACY_PER_CPU_AREA */
 
 struct percpu_data {
         void *ptrs[1];
@@ -99,11 +150,15 @@ struct percpu_data {
         (__typeof__(ptr))__p->ptrs[(cpu)];                              \
 })
 
-#endif /* CONFIG_HAVE_DYNAMIC_PER_CPU_AREA */
+#endif /* CONFIG_HAVE_LEGACY_PER_CPU_AREA */
 
 extern void *__alloc_percpu(size_t size, size_t align);
 extern void free_percpu(void *__pdata);
 
+#ifndef CONFIG_HAVE_SETUP_PER_CPU_AREA
+extern void __init setup_per_cpu_areas(void);
+#endif
+
 #else /* CONFIG_SMP */
 
 #define per_cpu_ptr(ptr, cpu) ({ (void)(cpu); (ptr); })
@@ -124,6 +179,13 @@ static inline void free_percpu(void *p)
         kfree(p);
 }
 
+static inline void __init setup_per_cpu_areas(void) { }
+
+static inline void *pcpu_lpage_remapped(void *kaddr)
+{
+        return NULL;
+}
+
 #endif /* CONFIG_SMP */
 
 #define alloc_percpu(type)      (type *)__alloc_percpu(sizeof(type), \