linux-kernel - [PATCH v2 37/46] hugetlb: replace make_huge_pte with make_huge_pte_with

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230218002819.1486479-38-jthoughton@google.com>
Date:   Sat, 18 Feb 2023 00:28:10 +0000
From:   James Houghton <jthoughton@...gle.com>
To:     Mike Kravetz <mike.kravetz@...cle.com>,
        Muchun Song <songmuchun@...edance.com>,
        Peter Xu <peterx@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     David Hildenbrand <david@...hat.com>,
        David Rientjes <rientjes@...gle.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Mina Almasry <almasrymina@...gle.com>,
        "Zach O'Keefe" <zokeefe@...gle.com>,
        Manish Mishra <manish.mishra@...anix.com>,
        Naoya Horiguchi <naoya.horiguchi@....com>,
        "Dr . David Alan Gilbert" <dgilbert@...hat.com>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        Miaohe Lin <linmiaohe@...wei.com>,
        Yang Shi <shy828301@...il.com>,
        Frank van der Linden <fvdl@...gle.com>,
        Jiaqi Yan <jiaqiyan@...gle.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        James Houghton <jthoughton@...gle.com>
Subject: [PATCH v2 37/46] hugetlb: replace make_huge_pte with make_huge_pte_with_shift

This removes the old definition of make_huge_pte, where now we always
require the shift to be explicitly given. All callsites are cleaned up.

Signed-off-by: James Houghton <jthoughton@...gle.com>

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index e0a92e7c1755..4c9b3c5379b2 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -5204,9 +5204,9 @@ const struct vm_operations_struct hugetlb_vm_ops = {
 	.pagesize = hugetlb_vm_op_pagesize,
 };
 
-static pte_t make_huge_pte_with_shift(struct vm_area_struct *vma,
-				      struct page *page, int writable,
-				      int shift)
+static pte_t make_huge_pte(struct vm_area_struct *vma,
+			   struct page *page, int writable,
+			   int shift)
 {
 	pte_t entry;
 
@@ -5222,14 +5222,6 @@ static pte_t make_huge_pte_with_shift(struct vm_area_struct *vma,
 	return entry;
 }
 
-static pte_t make_huge_pte(struct vm_area_struct *vma, struct page *page,
-			   int writable)
-{
-	unsigned int shift = huge_page_shift(hstate_vma(vma));
-
-	return make_huge_pte_with_shift(vma, page, writable, shift);
-}
-
 static void set_huge_ptep_writable(struct vm_area_struct *vma,
 				   unsigned long address, pte_t *ptep)
 {
@@ -5272,7 +5264,9 @@ hugetlb_install_folio(struct vm_area_struct *vma, pte_t *ptep, unsigned long add
 {
 	__folio_mark_uptodate(new_folio);
 	hugepage_add_new_anon_rmap(new_folio, vma, addr);
-	set_huge_pte_at(vma->vm_mm, addr, ptep, make_huge_pte(vma, &new_folio->page, 1));
+	set_huge_pte_at(vma->vm_mm, addr, ptep, make_huge_pte(
+				vma, &new_folio->page, 1,
+				huge_page_shift(hstate_vma(vma))));
 	hugetlb_count_add(pages_per_huge_page(hstate_vma(vma)), vma->vm_mm);
 	folio_set_hugetlb_migratable(new_folio);
 }
@@ -6006,7 +6000,8 @@ static vm_fault_t hugetlb_wp(struct mm_struct *mm, struct vm_area_struct *vma,
 		hugetlb_remove_rmap(old_page, huge_page_shift(h), h, vma);
 		hugepage_add_new_anon_rmap(new_folio, vma, haddr);
 		set_huge_pte_at(mm, haddr, ptep,
-				make_huge_pte(vma, &new_folio->page, !unshare));
+				make_huge_pte(vma, &new_folio->page, !unshare,
+					      huge_page_shift(h)));
 		folio_set_hugetlb_migratable(new_folio);
 		/* Make the old page be freed below */
 		new_folio = page_folio(old_page);
@@ -6348,7 +6343,7 @@ static vm_fault_t hugetlb_no_page(struct mm_struct *mm,
 	else
 		hugetlb_add_file_rmap(subpage, hpte->shift, h, vma);
 
-	new_pte = make_huge_pte_with_shift(vma, subpage,
+	new_pte = make_huge_pte(vma, subpage,
 			((vma->vm_flags & VM_WRITE)
 			 && (vma->vm_flags & VM_SHARED)),
 			hpte->shift);
@@ -6770,8 +6765,7 @@ int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm,
 	else
 		writable = dst_vma->vm_flags & VM_WRITE;
 
-	_dst_pte = make_huge_pte_with_shift(dst_vma, subpage, writable,
-			dst_hpte->shift);
+	_dst_pte = make_huge_pte(dst_vma, subpage, writable, dst_hpte->shift);
 	/*
 	 * Always mark UFFDIO_COPY page dirty; note that this may not be
 	 * extremely important for hugetlbfs for now since swapping is not
@@ -8169,8 +8163,7 @@ static int __hugetlb_collapse(struct mm_struct *mm, struct vm_area_struct *vma,
 		}
 
 		subpage = hugetlb_find_subpage(h, folio, curr);
-		entry = make_huge_pte_with_shift(vma, subpage,
-						 writable, hpte.shift);
+		entry = make_huge_pte(vma, subpage, writable, hpte.shift);
 		hugetlb_add_file_rmap(subpage, hpte.shift, h, vma);
 		set_huge_pte_at(mm, curr, hpte.ptep, entry);
 		spin_unlock(ptl);
-- 
2.39.2.637.g21b0678d19-goog