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authorSidhartha Kumar <sidhartha.kumar@oracle.com>2022-09-22 18:42:07 +0300
committerAndrew Morton <akpm@linux-foundation.org>2022-11-09 04:37:12 +0300
commite51da3a9b6c2f67879880259a25c51dbda01c462 (patch)
tree07aca1d7944489fd40fa52f8ef910520893cc568 /include/linux/hugetlb.h
parentece62684dcfb714b7d8452056b4a33d426b16457 (diff)
downloadlinux-e51da3a9b6c2f67879880259a25c51dbda01c462.tar.xz
mm/hugetlb: add folio_hstate()
Helper function to retrieve hstate information from a hugetlb folio. Link: https://lkml.kernel.org/r/20220922154207.1575343-6-sidhartha.kumar@oracle.com Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com> Reported-by: kernel test robot <lkp@intel.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Colin Cross <ccross@google.com> Cc: David Howells <dhowells@redhat.com> Cc: "Eric W . Biederman" <ebiederm@xmission.com> Cc: Hugh Dickins <hughd@google.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Muchun Song <songmuchun@bytedance.com> Cc: Peter Xu <peterx@redhat.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: William Kucharski <william.kucharski@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/hugetlb.h')
-rw-r--r--include/linux/hugetlb.h14
1 files changed, 12 insertions, 2 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 496d02bdb997..20a0d5a08395 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -824,10 +824,15 @@ static inline pte_t arch_make_huge_pte(pte_t entry, unsigned int shift,
}
#endif
+static inline struct hstate *folio_hstate(struct folio *folio)
+{
+ VM_BUG_ON_FOLIO(!folio_test_hugetlb(folio), folio);
+ return size_to_hstate(folio_size(folio));
+}
+
static inline struct hstate *page_hstate(struct page *page)
{
- VM_BUG_ON_PAGE(!PageHuge(page), page);
- return size_to_hstate(page_size(page));
+ return folio_hstate(page_folio(page));
}
static inline unsigned hstate_index_to_shift(unsigned index)
@@ -1036,6 +1041,11 @@ static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
return NULL;
}
+static inline struct hstate *folio_hstate(struct folio *folio)
+{
+ return NULL;
+}
+
static inline struct hstate *page_hstate(struct page *page)
{
return NULL;