Re: [PATCH v4 1/6] mtd: nand: vf610_nfc: Freescale NFC for VF610, MPC5125 and others

Sebastian Andrzej Siewior
2015-06-09T20:08:08Z

On 2015-06-03 17:05:16 [+0200], Stefan Agner wrote:
> As Boris guessed correctly, the reason I used the raw variant was due to
> performance improvements due to the barrier. However, I will use

yeah, do you have any numbers by chance?

> {read|write}l_relaxed instead, which should offer endian abstraction
> while not having the performance penalty due to extensive barriers...

well, even those
|$ git grep readl_relaxed arch/powerpc/
|arch/powerpc/include/asm/io.h:#define readl_relaxed(addr) readl(addr)

have the endian swap. So an abstraction like you provided earlier
would be nice :)

> --
> Stefan

Sebastian