linux-kernel - RE: [RFC] genalloc:add an gen_pool_alloc

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Date:	Fri, 10 Jul 2015 05:28:06 +0000
From:	Zhao Qiang <qiang.zhao@...escale.com>
To:	Scott Wood <scottwood@...escale.com>
CC:	"lauraa@...eaurora.org" <lauraa@...eaurora.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"olof@...om.net" <olof@...om.net>,
	"catalin.marinas@....com" <catalin.marinas@....com>,
	"Xiaobo Xie" <X.Xie@...escale.com>
Subject: RE: [RFC] genalloc:add an gen_pool_alloc_align func to genalloc




> -----Original Message-----
> From: Wood Scott-B07421
> Sent: Friday, July 10, 2015 6:20 AM
> To: Zhao Qiang-B45475
> Cc: lauraa@...eaurora.org; linux-kernel@...r.kernel.org; linuxppc-
> dev@...ts.ozlabs.org; akpm@...ux-foundation.org; olof@...om.net;
> catalin.marinas@....com; Xie Xiaobo-R63061
> Subject: Re: [RFC] genalloc:add an gen_pool_alloc_align func to genalloc
> 
> On Thu, 2015-07-09 at 15:47 +0800, Zhao Qiang wrote:
> > @@ -541,13 +562,14 @@ EXPORT_SYMBOL(gen_pool_first_fit_order_align);
> >   * which we can allocate the memory.
> >   */
> >  unsigned long gen_pool_best_fit(unsigned long *map, unsigned long size,
> > -             unsigned long start, unsigned int nr, void *data)
> > +                             unsigned long start, unsigned int nr,
> > +                             void *data, unsigned long align_mask)
> >  {
> >       unsigned long start_bit = size;
> >       unsigned long len = size + 1;
> >       unsigned long index;
> >
> > -     index = bitmap_find_next_zero_area(map, size, start, nr, 0);
> > +     index = bitmap_find_next_zero_area(map, size, start, nr,
> align_mask);
> >
> >       while (index < size) {
> >               int next_bit = find_next_bit(map, size, index + nr);
> 
> What about the other call to bitmap_find_next_zero_area()?

All others will pass the align_mask to bitmap_find_next_zero_area.

> 
> -Scott