From: Pedro Demarchi Gomes <pedrodemargomes@gmail.com>
To: Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>
Cc: Robin Murphy <robin.murphy@arm.com>,
iommu@lists.linux.dev, linux-kernel@vger.kernel.org,
Pedro Demarchi Gomes <pedrodemargomes@gmail.com>
Subject: [PATCH] iommu/pages: use folio_nr_pages() instead of shift operation
Date: Sat, 4 Oct 2025 00:23:51 -0300 [thread overview]
Message-ID: <20251004032351.51150-1-pedrodemargomes@gmail.com> (raw)
folio_nr_pages() is a faster helper function to get the number of pages when
NR_PAGES_IN_LARGE_FOLIO is enabled.
Signed-off-by: Pedro Demarchi Gomes <pedrodemargomes@gmail.com>
---
drivers/iommu/iommu-pages.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/iommu-pages.c b/drivers/iommu/iommu-pages.c
index 238c09e5166b..3cb8fcc39066 100644
--- a/drivers/iommu/iommu-pages.c
+++ b/drivers/iommu/iommu-pages.c
@@ -80,7 +80,7 @@ EXPORT_SYMBOL_GPL(iommu_alloc_pages_node_sz);
static void __iommu_free_desc(struct ioptdesc *iopt)
{
struct folio *folio = ioptdesc_folio(iopt);
- const unsigned long pgcnt = 1UL << folio_order(folio);
+ const unsigned long pgcnt = folio_nr_pages(folio);
mod_node_page_state(folio_pgdat(folio), NR_IOMMU_PAGES, -pgcnt);
lruvec_stat_mod_folio(folio, NR_SECONDARY_PAGETABLE, -pgcnt);
--
2.39.5
next reply other threads:[~2025-10-04 3:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-04 3:23 Pedro Demarchi Gomes [this message]
2025-10-06 12:28 ` [PATCH] iommu/pages: use folio_nr_pages() instead of shift operation Jason Gunthorpe
2025-10-27 11:47 ` Joerg Roedel
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