Re: HELP: Is writeq an atomic operation?? | KernelTrap

Re: HELP: Is writeq an atomic operation??

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From: David Miller <davem@...>

To: <Eric.Moore@...>

Cc: <linux-scsi@...>, <linux-kernel@...>

Subject: Re: HELP: Is writeq an atomic operation??

Date: Friday, May 2, 2008 - 6:32 pm

From: "Moore, Eric" <Eric.Moore@lsi.com>
Date: Fri, 2 May 2008 16:19:49 -0600

quoted text> Is a 64bit write to MMIO registers an atomic operation when using the
> writeq API?  

The answer to this question this is platform dependent.

On most 64-bit platforms, it is.  On some 32-bit ones, it is not.

This is not a SCSI layer question, so belongs minimally on
linux-kernel which I've CC:'d.
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Messages in current thread:

Re: HELP: Is writeq an atomic operation??, David Miller, (Fri May 2, 6:32 pm)

Re: HELP: Is writeq an atomic operation??, Roland Dreier, (Fri May 2, 6:43 pm)

RE: HELP: Is writeq an atomic operation??, Moore, Eric, (Fri May 2, 6:49 pm)

Re: HELP: Is writeq an atomic operation??, Roland Dreier, (Fri May 2, 6:53 pm)

RE: HELP: Is writeq an atomic operation??, Moore, Eric, (Fri May 2, 7:13 pm)

Re: HELP: Is writeq an atomic operation??, Roland Dreier, (Fri May 2, 7:21 pm)

RE: HELP: Is writeq an atomic operation??, Moore, Eric, (Fri May 2, 7:31 pm)

Re: HELP: Is writeq an atomic operation??, David Miller, (Fri May 2, 6:49 pm)

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