linux-kernel - [PATCH v2 net-next 09/14] pinctrl: ocelot: avoid macro redefinition

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Date:   Wed, 21 Sep 2022 21:00:57 -0700
From:   Colin Foster <colin.foster@...advantage.com>
To:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, netdev@...r.kernel.org
Cc:     Russell King <linux@...linux.org.uk>,
        Linus Walleij <linus.walleij@...aro.org>,
        UNGLinuxDriver@...rochip.com,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Lee Jones <lee@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Vladimir Oltean <olteanv@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Andrew Lunn <andrew@...n.ch>
Subject: [PATCH v2 net-next 09/14] pinctrl: ocelot: avoid macro redefinition

The macro REG gets defined in at least two locations -
drivers/pinctrl/pinctrl-ocelot.c and include/soc/mscc/ocelot.h. While
pinctrl-ocelot.c doesn't include include/soc/mscc/ocelot.h, it does in fact
include include/linux/mfd/ocelot.h.

This was all fine, until include/linux/mfd/ocelot.h needed resources from
include/soc/mscc/ocelot.h. At that point the REG macro becomes redefined,
and will throw a compiler error.

Undefine the REG macro in drivers/pinctrl/pinctrl-ocelot.c before it is
defined to avoid this error.

Signed-off-by: Colin Foster <colin.foster@...advantage.com>
---

v2
    * New patch

---
 drivers/pinctrl/pinctrl-ocelot.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pinctrl/pinctrl-ocelot.c b/drivers/pinctrl/pinctrl-ocelot.c
index f635743a639d..b2191407fc1a 100644
--- a/drivers/pinctrl/pinctrl-ocelot.c
+++ b/drivers/pinctrl/pinctrl-ocelot.c
@@ -1231,6 +1231,7 @@ static int lan966x_pinmux_set_mux(struct pinctrl_dev *pctldev,
 	return 0;
 }
 
+#undef REG
 #define REG(r, info, p) ((r) * (info)->stride + (4 * ((p) / 32)))
 
 static int ocelot_gpio_set_direction(struct pinctrl_dev *pctldev,
-- 
2.25.1