linux-kernel - [PATCH] MIPS: IP22: Fix build error in IP22 cache code

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Date:   Fri, 14 Oct 2016 11:19:57 +0100
From:   Matt Redfearn <matt.redfearn@...tec.com>
To:     Ralf Baechle <ralf@...ux-mips.org>
CC:     <linux-mips@...ux-mips.org>,
        Matt Redfearn <matt.redfearn@...tec.com>,
        <stable@...r.kernel.org>,
        Adam Buchbinder <adam.buchbinder@...il.com>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] MIPS: IP22: Fix build error in IP22 cache code

Recent MIPS toolchains complain about the use of an immediate larger
than 32bits when compiling a 32bit kernel, leading to the following
build failure:
{standard input}: Assembler messages:
{standard input}:131: Error: number (0x9000000080000000) larger than 32
bits
{standard input}:154: Error: number (0x9000000080000000) larger than 32
bits
{standard input}:191: Error: number (0x9000000080000000) larger than 32
bits

Fix this by specifying registers are 64bit via the .set gp=64 directive.

Since IP22 is the default MIPS machine, this is causing allnoconfig
build failures.

Fixes: 1da177e4c3f4
Signed-off-by: Matt Redfearn <matt.redfearn@...tec.com>

Cc: stable@...r.kernel.org
---

 arch/mips/mm/sc-ip22.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/mips/mm/sc-ip22.c b/arch/mips/mm/sc-ip22.c
index 026cb59a914d..6551ca37d308 100644
--- a/arch/mips/mm/sc-ip22.c
+++ b/arch/mips/mm/sc-ip22.c
@@ -35,6 +35,7 @@ static inline void indy_sc_wipe(unsigned long first, unsigned long last)
 	".set\tnoreorder\n\t"
 	".set\tmips3\n\t"
 	".set\tnoat\n\t"
+	".set\tgp=64\n\t"
 	"mfc0\t%2, $12\n\t"
 	"li\t$1, 0x80\t\t\t# Go 64 bit\n\t"
 	"mtc0\t$1, $12\n\t"
-- 
2.7.4