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authorMatthew Wilcox (Oracle) <willy@infradead.org>2019-09-24 01:34:28 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-09-25 01:54:08 +0300
commit94ad9338109fe9d0b8a4a16828719dd6dcaee4c2 (patch)
tree7109a0b670c3aeff78fe86fa00f1488371cdcef4 /drivers/vfio/vfio_iommu_spapr_tce.c
parenta50b854e073cd3335bbbada8dcff83a857297dd7 (diff)
downloadlinux-94ad9338109fe9d0b8a4a16828719dd6dcaee4c2.tar.xz
mm: introduce page_shift()
Replace PAGE_SHIFT + compound_order(page) with the new page_shift() function. Minor improvements in readability. [akpm@linux-foundation.org: fix build in tce_page_is_contained()] Link: http://lkml.kernel.org/r/201907241853.yNQTrJWd%25lkp@intel.com Link: http://lkml.kernel.org/r/20190721104612.19120-3-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/vfio/vfio_iommu_spapr_tce.c')
-rw-r--r--drivers/vfio/vfio_iommu_spapr_tce.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
index 3b18fa4d090a..26cef65b41e7 100644
--- a/drivers/vfio/vfio_iommu_spapr_tce.c
+++ b/drivers/vfio/vfio_iommu_spapr_tce.c
@@ -176,13 +176,13 @@ put_exit:
}
static bool tce_page_is_contained(struct mm_struct *mm, unsigned long hpa,
- unsigned int page_shift)
+ unsigned int it_page_shift)
{
struct page *page;
unsigned long size = 0;
- if (mm_iommu_is_devmem(mm, hpa, page_shift, &size))
- return size == (1UL << page_shift);
+ if (mm_iommu_is_devmem(mm, hpa, it_page_shift, &size))
+ return size == (1UL << it_page_shift);
page = pfn_to_page(hpa >> PAGE_SHIFT);
/*
@@ -190,7 +190,7 @@ static bool tce_page_is_contained(struct mm_struct *mm, unsigned long hpa,
* a page we just found. Otherwise the hardware can get access to
* a bigger memory chunk that it should.
*/
- return (PAGE_SHIFT + compound_order(compound_head(page))) >= page_shift;
+ return page_shift(compound_head(page)) >= it_page_shift;
}
static inline bool tce_groups_attached(struct tce_container *container)