Re: [PATCH 1/2] arch: Define CPU_BIG_ENDIAN for all fixed big endian archs

[David Miller]

From: Babu Moger <babu.moger@xxxxxxxxxx>
Date: Thu,  8 Jun 2017 15:17:22 -0700

> While working on enabling queued rwlock on SPARC, found
> this following code in include/asm-generic/qrwlock.h
> which uses CONFIG_CPU_BIG_ENDIAN to clear a byte.
> 
> static inline u8 *__qrwlock_write_byte(struct qrwlock *lock)
>  {
> 	return (u8 *)lock + 3 * IS_BUILTIN(CONFIG_CPU_BIG_ENDIAN);
>  }
> 
> Problem is many of the fixed big endian architectures dont define
> CPU_BIG_ENDIAN and clears the wrong byte.
> 
> Define CPU_BIG_ENDIAN for all the fixed big endian architecture.
> 
> Here is the orinal discussion
> http://www.spinics.net/lists/devicetree/msg178101.html
> 
> Signed-off-by: Babu Moger <babu.moger@xxxxxxxxxx>
> Suggested-by: Arnd Bergmann <arnd@xxxxxxxx>

Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>