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Date: Tue, 3 Aug 2021 15:41:33 +0800 From: Jason Wang <jasowang@...hat.com> To: Xie Yongji <xieyongji@...edance.com>, mst@...hat.com, stefanha@...hat.com, sgarzare@...hat.com, parav@...dia.com, hch@...radead.org, christian.brauner@...onical.com, rdunlap@...radead.org, willy@...radead.org, viro@...iv.linux.org.uk, axboe@...nel.dk, bcrl@...ck.org, corbet@....net, mika.penttila@...tfour.com, dan.carpenter@...cle.com, joro@...tes.org, gregkh@...uxfoundation.org, zhe.he@...driver.com, xiaodong.liu@...el.com, joe@...ches.com Cc: songmuchun@...edance.com, virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org, kvm@...r.kernel.org, linux-fsdevel@...r.kernel.org, iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v10 01/17] iova: Export alloc_iova_fast() and free_iova_fast() 在 2021/7/29 下午3:34, Xie Yongji 写道: > Export alloc_iova_fast() and free_iova_fast() so that > some modules can use it to improve iova allocation efficiency. It's better to explain why alloc_iova() is not sufficient here. Thanks > > Signed-off-by: Xie Yongji <xieyongji@...edance.com> > --- > drivers/iommu/iova.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c > index b6cf5f16123b..3941ed6bb99b 100644 > --- a/drivers/iommu/iova.c > +++ b/drivers/iommu/iova.c > @@ -521,6 +521,7 @@ alloc_iova_fast(struct iova_domain *iovad, unsigned long size, > > return new_iova->pfn_lo; > } > +EXPORT_SYMBOL_GPL(alloc_iova_fast); > > /** > * free_iova_fast - free iova pfn range into rcache > @@ -538,6 +539,7 @@ free_iova_fast(struct iova_domain *iovad, unsigned long pfn, unsigned long size) > > free_iova(iovad, pfn); > } > +EXPORT_SYMBOL_GPL(free_iova_fast); > > #define fq_ring_for_each(i, fq) \ > for ((i) = (fq)->head; (i) != (fq)->tail; (i) = ((i) + 1) % IOVA_FQ_SIZE)
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