Messages in this thread | | | From | David Howells <> | Subject | Re: [PATCH 11/11] afs: Fix dirty-region encoding on ppc32 with 64K pages | Date | Wed, 28 Oct 2020 17:05:08 +0000 |
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Matthew Wilcox <willy@infradead.org> wrote:
> > +{ > > + if (PAGE_SIZE - 1 <= __AFS_PAGE_PRIV_MASK) > > + return 1; > > + else > > + return PAGE_SIZE / (__AFS_PAGE_PRIV_MASK + 1); > > Could this be DIV_ROUND_UP(PAGE_SIZE, __AFS_PAGE_PRIV_MASK + 1); avoiding > a conditional? I appreciate it's calculated at compile time today, but > it'll be dynamic with THP.
Hmmm - actually, I want a shift size, not a number of bytes as I divide by it twice in afs_page_dirty().
David
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