linux-kernel - [PATCH] ARM: at91: avoid defining CONFIG

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Message-Id: <1456238384-882646-1-git-send-email-arnd@arndb.de>
Date:	Tue, 23 Feb 2016 15:39:38 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Nicolas Ferre <nicolas.ferre@...el.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Arnd Bergmann <arnd@...db.de>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Russell King <linux@....linux.org.uk>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] ARM: at91: avoid defining CONFIG_* symbols in source code

In an invalid randconfig build (fixed by another patch),
I ran across this warning:

arch/arm/include/debug/at91.S:18:0: error: "CONFIG_DEBUG_UART_VIRT" redefined [-Werror]
 #define CONFIG_DEBUG_UART_VIRT AT91_IO_P2V(CONFIG_DEBUG_UART_PHYS)

As Russell pointed out, we should never #define a macro starting
with CONFIG_ in a source file, as that is rather confusing.

This renames the macro to avoid the symbol clash.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Suggested-by: Russell King <linux@....linux.org.uk>
---
 arch/arm/include/debug/at91.S | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/include/debug/at91.S b/arch/arm/include/debug/at91.S
index 43243be94cfc..d4ae3b8e2426 100644
--- a/arch/arm/include/debug/at91.S
+++ b/arch/arm/include/debug/at91.S
@@ -15,7 +15,7 @@
 #define AT91_IO_P2V(x) (x)
 #endif
 
-#define CONFIG_DEBUG_UART_VIRT AT91_IO_P2V(CONFIG_DEBUG_UART_PHYS)
+#define AT91_DEBUG_UART_VIRT AT91_IO_P2V(CONFIG_DEBUG_UART_PHYS)
 
 #define AT91_DBGU_SR		(0x14)	/* Status Register */
 #define AT91_DBGU_THR		(0x1c)	/* Transmitter Holding Register */
@@ -24,7 +24,7 @@
 
 	.macro	addruart, rp, rv, tmp
 	ldr	\rp, =CONFIG_DEBUG_UART_PHYS		@ System peripherals (phys address)
-	ldr	\rv, =CONFIG_DEBUG_UART_VIRT		@ System peripherals (virt address)
+	ldr	\rv, =AT91_DEBUG_UART_VIRT		@ System peripherals (virt address)
 	.endm
 
 	.macro	senduart,rd,rx
-- 
2.7.0