netdev - [PATCH] brcmfmac: avoid gcc-5.1 warning

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Message-ID: <2201884.BixNBcLJhn@wuerfel>
Date:	Tue, 12 May 2015 23:54:25 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Arend Van Spriel <arend@...adcom.com>
Cc:	Pieter-Paul Giesberts <pieterpg@...adcom.com>,
	"John W. Linville" <linville@...driver.com>,
	linux-wireless@...r.kernel.org, brcm80211-dev-list@...adcom.com,
	Brett Rudley <brudley@...adcom.com>,
	Franky Lin <frankyl@...adcom.com>,
	Hante Meuleman <meuleman@...adcom.com>,
	linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org
Subject: [PATCH] brcmfmac: avoid gcc-5.1 warning

gcc-5.0 gained a new warning in the fwsignal portion of the brcmfmac
driver:

drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c: In function 'brcmf_fws_txs_process':
drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c:1478:8: warning: 'skb' may be used uninitialized in this function [-Wmaybe-uninitialized]

This is a false positive, and marking the brcmf_fws_hanger_poppkt function
as 'static inline' makes the warning go away. I have checked the object
file output and while a little code gets moved around, the size of
the binary remains identical.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
Found while building the ARM imx_v6_v7_defconfig configuration with gcc-5.
We try to get all ARM defconfigs to build without warnings normally.

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
index f0dda0ecd23b..5017eaa4af45 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
@@ -635,7 +635,7 @@ static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h,
 	return 0;
 }
 
-static int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h,
+static inline int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h,
 					  u32 slot_id, struct sk_buff **pktout,
 					  bool remove_item)
 {

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