[PATCH v4 3/7] arch/sparc: Define config parameter CPU_BIG_ENDIAN

From	Babu Moger <babu.moger@oracle.com>
Newsgroups	linux.kernel
Subject	[PATCH v4 3/7] arch/sparc: Define config parameter CPU_BIG_ENDIAN
Date	2017-05-25 02:00 +0200
Message-ID	<tKOm7-tO-41@gated-at.bofh.it> (permalink)
References	<tKOm5-tO-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Found this problem while enabling queued rwlock on SPARC.
The parameter CONFIG_CPU_BIG_ENDIAN is used to clear the
specific byte in qrwlock structure. Without this parameter,
we clear the wrong byte. Here is the code.

static inline u8 *__qrwlock_write_byte(struct qrwlock *lock)
 {
	return (u8 *)lock + 3 * IS_BUILTIN(CONFIG_CPU_BIG_ENDIAN);
 }

Define CPU_BIG_ENDIAN for SPARC to fix it.

Signed-off-by: Babu Moger <babu.moger@oracle.com>
Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com>
Reviewed-by: Jane Chu <jane.chu@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Reviewed-by: Vijay Kumar <vijay.ac.kumar@oracle.com>
---
 arch/sparc/Kconfig |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 908f019..0d9dc49 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -92,6 +92,9 @@ config ARCH_DEFCONFIG
 config ARCH_PROC_KCORE_TEXT
 	def_bool y
 
+config CPU_BIG_ENDIAN
+	def_bool y
+
 config ARCH_ATU
 	bool
 	default y if SPARC64
-- 
1.7.1

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[PATCH v4 3/7] arch/sparc: Define config parameter CPU_BIG_ENDIAN Babu Moger <babu.moger@oracle.com> - 2017-05-25 02:00 +0200

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