Date:   Sat, 18 Feb 2023 00:27:35 +0000
In-Reply-To: <20230218002819.1486479-1-jthoughton@google.com>
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References: <20230218002819.1486479-1-jthoughton@google.com>
Message-ID: <20230218002819.1486479-3-jthoughton@google.com>
Subject: [PATCH v2 02/46] hugetlb: remove mk_huge_pte; it is unused
From:   James Houghton <jthoughton@google.com>
To:     Mike Kravetz <mike.kravetz@oracle.com>,
        Muchun Song <songmuchun@bytedance.com>,
        Peter Xu <peterx@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>
Cc:     David Hildenbrand <david@redhat.com>,
        David Rientjes <rientjes@google.com>,
        Axel Rasmussen <axelrasmussen@google.com>,
        Mina Almasry <almasrymina@google.com>,
        "Zach O'Keefe" <zokeefe@google.com>,
        Manish Mishra <manish.mishra@nutanix.com>,
        Naoya Horiguchi <naoya.horiguchi@nec.com>,
        "Dr . David Alan Gilbert" <dgilbert@redhat.com>,
        "Matthew Wilcox (Oracle)" <willy@infradead.org>,
        Vlastimil Babka <vbabka@suse.cz>,
        Baolin Wang <baolin.wang@linux.alibaba.com>,
        Miaohe Lin <linmiaohe@huawei.com>,
        Yang Shi <shy828301@gmail.com>,
        Frank van der Linden <fvdl@google.com>,
        Jiaqi Yan <jiaqiyan@google.com>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org,
        James Houghton <jthoughton@google.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

mk_huge_pte is unused and not necessary. pte_mkhuge is the appropriate
function to call to create a HugeTLB PTE (see
Documentation/mm/arch_pgtable_helpers.rst).

It is being removed now to avoid complicating the implementation of
HugeTLB high-granularity mapping.

Acked-by: Peter Xu <peterx@redhat.com>
Acked-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: James Houghton <jthoughton@google.com>

diff --git a/arch/s390/include/asm/hugetlb.h b/arch/s390/include/asm/hugetlb.h
index ccdbccfde148..c34893719715 100644
--- a/arch/s390/include/asm/hugetlb.h
+++ b/arch/s390/include/asm/hugetlb.h
@@ -77,11 +77,6 @@ static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
 	set_huge_pte_at(mm, addr, ptep, pte_wrprotect(pte));
 }
 
-static inline pte_t mk_huge_pte(struct page *page, pgprot_t pgprot)
-{
-	return mk_pte(page, pgprot);
-}
-
 static inline int huge_pte_none(pte_t pte)
 {
 	return pte_none(pte);
diff --git a/include/asm-generic/hugetlb.h b/include/asm-generic/hugetlb.h
index d7f6335d3999..be2e763e956f 100644
--- a/include/asm-generic/hugetlb.h
+++ b/include/asm-generic/hugetlb.h
@@ -5,11 +5,6 @@
 #include <linux/swap.h>
 #include <linux/swapops.h>
 
-static inline pte_t mk_huge_pte(struct page *page, pgprot_t pgprot)
-{
-	return mk_pte(page, pgprot);
-}
-
 static inline unsigned long huge_pte_write(pte_t pte)
 {
 	return pte_write(pte);
diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
index af59cc7bd307..fbbc53113473 100644
--- a/mm/debug_vm_pgtable.c
+++ b/mm/debug_vm_pgtable.c
@@ -925,7 +925,7 @@ static void __init hugetlb_basic_tests(struct pgtable_debug_args *args)
 	 * as it was previously derived from a real kernel symbol.
 	 */
 	page = pfn_to_page(args->fixed_pmd_pfn);
-	pte = mk_huge_pte(page, args->page_prot);
+	pte = mk_pte(page, args->page_prot);
 
 	WARN_ON(!huge_pte_dirty(huge_pte_mkdirty(pte)));
 	WARN_ON(!huge_pte_write(huge_pte_mkwrite(huge_pte_wrprotect(pte))));
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 792cb2e67ce5..540cdf9570d3 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -4899,11 +4899,10 @@ static pte_t make_huge_pte(struct vm_area_struct *vma, struct page *page,
 	unsigned int shift = huge_page_shift(hstate_vma(vma));
 
 	if (writable) {
-		entry = huge_pte_mkwrite(huge_pte_mkdirty(mk_huge_pte(page,
-					 vma->vm_page_prot)));
+		entry = huge_pte_mkwrite(huge_pte_mkdirty(mk_pte(page,
+						vma->vm_page_prot)));
 	} else {
-		entry = huge_pte_wrprotect(mk_huge_pte(page,
-					   vma->vm_page_prot));
+		entry = huge_pte_wrprotect(mk_pte(page, vma->vm_page_prot));
 	}
 	entry = pte_mkyoung(entry);
 	entry = arch_make_huge_pte(entry, shift, vma->vm_flags);
-- 
2.39.2.637.g21b0678d19-goog