netdev - [PATCH net-next 1/3] once: use _

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Date:   Mon, 15 Nov 2021 09:23:01 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH net-next 1/3] once: use __section(".data.once")

From: Eric Dumazet <edumazet@...gle.com>

.data.once contains nicely packed bool variables.
It is used already by DO_ONCE_LITE().

Using it also in DO_ONCE() removes holes in .data section.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 include/linux/once.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/once.h b/include/linux/once.h
index d361fb14ac3a2c5b77c289107f093862194ebd1c..f54523052bbcb5d0c13017d4684b68ceb8da5855 100644
--- a/include/linux/once.h
+++ b/include/linux/once.h
@@ -38,7 +38,7 @@ void __do_once_done(bool *done, struct static_key_true *once_key,
 #define DO_ONCE(func, ...)						     \
 	({								     \
 		bool ___ret = false;					     \
-		static bool ___done = false;				     \
+		static bool __section(".data.once") ___done = false;	     \
 		static DEFINE_STATIC_KEY_TRUE(___once_key);		     \
 		if (static_branch_unlikely(&___once_key)) {		     \
 			unsigned long ___flags;				     \
-- 
2.34.0.rc1.387.gb447b232ab-goog