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Date:   Fri, 11 Aug 2017 03:03:27 -0700
From:   Christoph Hellwig <>
To:     Dan Williams <>
Cc:     Jan Kara <>, Christoph Hellwig <>,
        linux-nvdimm <>,
        Dave Chinner <>,,
        Andy Lutomirski <>,
        Linux FS Devel <>,
        "" <>
Subject: Re: [RFC PATCH 0/7] dax, ext4: Synchronous page faults

On Mon, Aug 07, 2017 at 05:24:08PM -0700, Dan Williams wrote:
> Does sys_mmap() reject unknown flag values today? I'm either not
> looking in the right place or it's missing and we'll need some
> interface/mechanism to check if MAP_SYNC is honored.

It doesn't seem to reject unknown flags.

The lack of flags checking strikes back once more, sighṫ.

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