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arch/sparc: Define config parameter CPU_BIG_ENDIAN
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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>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Babu Moger authored and David S. Miller committed May 25, 2017
1 parent 9ab6055 commit 97d9f96
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3 changes: 3 additions & 0 deletions arch/sparc/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -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
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