Re: [PATCH 1/6] fs: iomap: Atomic write support

[Christoph Hellwig]

On Mon, Feb 05, 2024 at 11:29:57AM +0000, John Garry wrote:
>>
>> Also, what's the meaning of REQ_OP_READ | REQ_ATOMIC? 
>
> REQ_ATOMIC will be ignored for REQ_OP_READ. I'm following the same policy 
> as something like RWF_SYNC for a read.

We've been rather sloppy with these flags in the past, which isn't
a good thing.  Let's add proper checking for new interfaces.