From: Muchun Song Subject: arm64: mm: hugetlb: restructure the code comment inside flush_dcache_page() Restructure the code comment inside flush_dcache_page() to make it more clear. Link: https://lkml.kernel.org/r/20220414072646.21910-1-songmuchun@bytedance.com Signed-off-by: Muchun Song Reviewed-by: Anshuman Khandual Signed-off-by: Andrew Morton --- arch/arm64/mm/flush.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) --- a/arch/arm64/mm/flush.c~arm64-mm-hugetlb-enable-hugetlb_page_free_vmemmap-for-arm64-fix +++ a/arch/arm64/mm/flush.c @@ -81,9 +81,10 @@ void flush_dcache_page(struct page *page * read-only when CONFIG_HUGETLB_PAGE_FREE_VMEMMAP is enabled (more * details can refer to vmemmap_remap_pte()). Although * __sync_icache_dcache() only set PG_dcache_clean flag on the head - * page struct, some tail page structs still can be seen the flag is - * set since the head vmemmap page frame is reused (more details can - * refer to the comments above page_fixed_fake_head()). + * page struct, there is more than one page struct with PG_dcache_clean + * associated with the HugeTLB page since the head vmemmap page frame + * is reused (more details can refer to the comments above + * page_fixed_fake_head()). */ if (hugetlb_free_vmemmap_enabled() && PageHuge(page)) page = compound_head(page); _