Thread (21 messages) 21 messages, 3 authors, 2015-06-18

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

From: Sebastian Andrzej Siewior <hidden>
Date: 2015-06-09 20:08:08
Also in: linux-arm-kernel, lkml

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
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