[PATCH] export sk_memalloc_socks() only with CONFIG_NET

[Sebastian Andrzej Siewior]

|mm/built-in.o: In function `atomic_read':
|include/asm/atomic.h:25: undefined reference to `memalloc_socks'
|include/asm/atomic.h:25: undefined reference to `memalloc_socks'
|include/asm/atomic.h:25: undefined reference to `memalloc_socks'
|include/asm/atomic.h:25: undefined reference to `memalloc_socks'
|include/asm/atomic.h:25: undefined reference to `memalloc_socks'
|mm/built-in.o:include/asm/atomic.h:25: more undefined references to `memalloc_socks' follow

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
 include/net/sock.h |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/net/sock.h b/include/net/sock.h
index db0c20c..767c443 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -659,11 +659,20 @@ static inline bool sock_flag(const struct sock *sk, enum sock_flags flag)
 	return test_bit(flag, &sk->sk_flags);
 }
 
+#ifdef CONFIG_NET
 extern struct static_key memalloc_socks;
 static inline int sk_memalloc_socks(void)
 {
 	return static_key_false(&memalloc_socks);
 }
+#else
+
+static inline int sk_memalloc_socks(void)
+{
+	return 0;
+}
+
+#endif
 
 static inline gfp_t sk_gfp_atomic(struct sock *sk, gfp_t gfp_mask)
 {
-- 
1.7.10

Sebastian
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