skbuff: move NAPI cache declarations upper in the file

NAPI cache structures will be used for allocating skbuff_heads,
so move their declarations a bit upper.

Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 4be2bb9..860a9d4 100644 (file)
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -119,6 +119,51 @@ static void skb_under_panic(struct sk_buff *skb, unsigned int sz, void *addr)
        skb_panic(skb, sz, addr, __func__);
 }
 
+#define NAPI_SKB_CACHE_SIZE    64
+
+struct napi_alloc_cache {
+       struct page_frag_cache page;
+       unsigned int skb_count;
+       void *skb_cache[NAPI_SKB_CACHE_SIZE];
+};
+
+static DEFINE_PER_CPU(struct page_frag_cache, netdev_alloc_cache);
+static DEFINE_PER_CPU(struct napi_alloc_cache, napi_alloc_cache);
+
+static void *__alloc_frag_align(unsigned int fragsz, gfp_t gfp_mask,
+                               unsigned int align_mask)
+{
+       struct napi_alloc_cache *nc = this_cpu_ptr(&napi_alloc_cache);
+
+       return page_frag_alloc_align(&nc->page, fragsz, gfp_mask, align_mask);
+}
+
+void *__napi_alloc_frag_align(unsigned int fragsz, unsigned int align_mask)
+{
+       fragsz = SKB_DATA_ALIGN(fragsz);
+
+       return __alloc_frag_align(fragsz, GFP_ATOMIC, align_mask);
+}
+EXPORT_SYMBOL(__napi_alloc_frag_align);
+
+void *__netdev_alloc_frag_align(unsigned int fragsz, unsigned int align_mask)
+{
+       struct page_frag_cache *nc;
+       void *data;
+
+       fragsz = SKB_DATA_ALIGN(fragsz);
+       if (in_irq() || irqs_disabled()) {
+               nc = this_cpu_ptr(&netdev_alloc_cache);
+               data = page_frag_alloc_align(nc, fragsz, GFP_ATOMIC, align_mask);
+       } else {
+               local_bh_disable();
+               data = __alloc_frag_align(fragsz, GFP_ATOMIC, align_mask);
+               local_bh_enable();
+       }
+       return data;
+}
+EXPORT_SYMBOL(__netdev_alloc_frag_align);
+
 /* Caller must provide SKB that is memset cleared */
 static void __build_skb_around(struct sk_buff *skb, void *data,
                               unsigned int frag_size)
@@ -220,51 +265,6 @@ struct sk_buff *build_skb_around(struct sk_buff *skb,
 }
 EXPORT_SYMBOL(build_skb_around);
 
-#define NAPI_SKB_CACHE_SIZE    64
-
-struct napi_alloc_cache {
-       struct page_frag_cache page;
-       unsigned int skb_count;
-       void *skb_cache[NAPI_SKB_CACHE_SIZE];
-};
-
-static DEFINE_PER_CPU(struct page_frag_cache, netdev_alloc_cache);
-static DEFINE_PER_CPU(struct napi_alloc_cache, napi_alloc_cache);
-
-static void *__alloc_frag_align(unsigned int fragsz, gfp_t gfp_mask,
-                               unsigned int align_mask)
-{
-       struct napi_alloc_cache *nc = this_cpu_ptr(&napi_alloc_cache);
-
-       return page_frag_alloc_align(&nc->page, fragsz, gfp_mask, align_mask);
-}
-
-void *__napi_alloc_frag_align(unsigned int fragsz, unsigned int align_mask)
-{
-       fragsz = SKB_DATA_ALIGN(fragsz);
-
-       return __alloc_frag_align(fragsz, GFP_ATOMIC, align_mask);
-}
-EXPORT_SYMBOL(__napi_alloc_frag_align);
-
-void *__netdev_alloc_frag_align(unsigned int fragsz, unsigned int align_mask)
-{
-       struct page_frag_cache *nc;
-       void *data;
-
-       fragsz = SKB_DATA_ALIGN(fragsz);
-       if (in_irq() || irqs_disabled()) {
-               nc = this_cpu_ptr(&netdev_alloc_cache);
-               data = page_frag_alloc_align(nc, fragsz, GFP_ATOMIC, align_mask);
-       } else {
-               local_bh_disable();
-               data = __alloc_frag_align(fragsz, GFP_ATOMIC, align_mask);
-               local_bh_enable();
-       }
-       return data;
-}
-EXPORT_SYMBOL(__netdev_alloc_frag_align);
-
 /*
  * kmalloc_reserve is a wrapper around kmalloc_node_track_caller that tells
  * the caller if emergency pfmemalloc reserves are being used. If it is and