net: dst_cache: minor optimization in dst_cache_set_ip6()

There is no need to use this_cpu_ptr(dst_cache->cache) twice.

Compiler is unable to optimize the second call, because of
per-cpu constraints.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Link: https://lore.kernel.org/r/20240507132717.627518-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/net/core/dst_cache.c b/net/core/dst_cache.c
index f9df84a6c4b2dbe63c6f61fb431e179f92e072e0..6a0482e676d379f1f9bffdda51c7535243b3ec38 100644 (file)
--- a/net/core/dst_cache.c
+++ b/net/core/dst_cache.c
@@ -112,7 +112,7 @@ void dst_cache_set_ip6(struct dst_cache *dst_cache, struct dst_entry *dst,
                return;
 
        idst = this_cpu_ptr(dst_cache->cache);
-       dst_cache_per_cpu_dst_set(this_cpu_ptr(dst_cache->cache), dst,
+       dst_cache_per_cpu_dst_set(idst, dst,
                                  rt6_get_cookie(dst_rt6_info(dst)));
        idst->in6_saddr = *saddr;
 }