linux-kernel - Re: [PATCH 03/15] mm: Add file_offset_of

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Message-ID: <20191004193302.GL32665@bombadil.infradead.org>
Date:   Fri, 4 Oct 2019 12:33:02 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Hillf Danton <hdanton@...a.com>
Cc:     linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/15] mm: Add file_offset_of_ helpers


Your mail program is still broken.  This shows up as a reply to the 0/15
email instead of as a reply to the 3/15 email.

On Wed, Oct 02, 2019 at 09:07:53PM +0800, Hillf Danton wrote:
> On Tue, 24 Sep 2019 17:52:02 -0700 From: Matthew Wilcox (Oracle)
> > +/**
> > + * file_offset_of_page - File offset of this page.
> > + * @page: Page cache page.
> > + *
> > + * Context: Any context.
> > + * Return: The offset of the first byte of this page.
> >   */
> > -static inline loff_t page_offset(struct page *page)
> > +static inline loff_t file_offset_of_page(struct page *page)
> >  {
> >  	return ((loff_t)page->index) << PAGE_SHIFT;
> >  }
> >  
> >  static inline loff_t page_file_offset(struct page *page)
> >  {
> >  	return ((loff_t)page_index(page)) << PAGE_SHIFT;
> 
> Would you like to specify the need to build a moon on the moon,
> with another name though?

I have no idea what you mean.  Is this an idiom in your native language,
perhaps?