net: inline napi_skb_cache_get()

clang is inlining it already, gcc (14.2) does not.

Small space cost (215 bytes on x86_64) but faster sk_buff allocations.

$ scripts/bloat-o-meter -t net/core/skbuff.gcc.before.o net/core/skbuff.gcc.after.o
add/remove: 0/1 grow/shrink: 4/1 up/down: 359/-144 (215)
Function                                     old     new   delta
__alloc_skb                                  471     611    +140
napi_build_skb                               245     363    +118
napi_alloc_skb                               331     416     +85
skb_copy_ubufs                              1869    1885     +16
skb_shift                                   1445    1413     -32
napi_skb_cache_get                           112       -    -112
Total: Before=59941, After=60156, chg +0.36%

Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260112131515.4051589-1-edumazet@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 4887099e8678352a62d805e1b0be2736dc985376..3d736c64bd878e4b38d95c7fcd0ef2e72a51f12a 100644 (file)
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -280,7 +280,7 @@ EXPORT_SYMBOL(__netdev_alloc_frag_align);
  */
 static u32 skbuff_cache_size __read_mostly;
 
-static struct sk_buff *napi_skb_cache_get(bool alloc)
+static inline struct sk_buff *napi_skb_cache_get(bool alloc)
 {
        struct napi_alloc_cache *nc = this_cpu_ptr(&napi_alloc_cache);
        struct sk_buff *skb;