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Date: Wed, 29 Mar 2017 10:48:36 +0200 From: Benjamin Gaignard <benjamin.gaignard@...aro.org> To: Laura Abbott <labbott@...hat.com> Cc: Sumit Semwal <sumit.semwal@...aro.org>, Riley Andrews <riandrews@...roid.com>, Arve Hjønnevåg <arve@...roid.com>, Rom Lemarchand <romlem@...gle.com>, devel@...verdev.osuosl.org, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, "linaro-mm-sig@...ts.linaro.org" <linaro-mm-sig@...ts.linaro.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, linux-arm-kernel@...ts.infradead.org, "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>, "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>, Brian Starkey <brian.starkey@....com>, Daniel Vetter <daniel.vetter@...el.com>, Mark Brown <broonie@...nel.org>, Linux MM <linux-mm@...ck.org>, Laurent Pinchart <laurent.pinchart@...asonboard.com> Subject: Re: [RFC PATCHv2 02/21] cma: Introduce cma_for_each_area 2017-03-18 1:54 GMT+01:00 Laura Abbott <labbott@...hat.com>: > > Frameworks (e.g. Ion) may want to iterate over each possible CMA area to > allow for enumeration. Introduce a function to allow a callback. even outside ION rework that could be useful Reviewed-by: Benjamin Gaignard <benjamin.gaignard@...aro.org> > > Signed-off-by: Laura Abbott <labbott@...hat.com> > --- > include/linux/cma.h | 2 ++ > mm/cma.c | 14 ++++++++++++++ > 2 files changed, 16 insertions(+) > > diff --git a/include/linux/cma.h b/include/linux/cma.h > index d41d1f8..3e8fbf5 100644 > --- a/include/linux/cma.h > +++ b/include/linux/cma.h > @@ -34,4 +34,6 @@ extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, > extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, > gfp_t gfp_mask); > extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count); > + > +extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data); > #endif > diff --git a/mm/cma.c b/mm/cma.c > index 0d187b1..9a040e1 100644 > --- a/mm/cma.c > +++ b/mm/cma.c > @@ -498,3 +498,17 @@ bool cma_release(struct cma *cma, const struct page *pages, unsigned int count) > > return true; > } > + > +int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data) > +{ > + int i; > + > + for (i = 0; i < cma_area_count; i++) { > + int ret = it(&cma_areas[i], data); > + > + if (ret) > + return ret; > + } > + > + return 0; > +} > -- > 2.7.4 > -- Benjamin Gaignard Graphic Study Group Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog
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