[folded-merged] hugetlb-userfaultfd-forbid-huge-pmd-sharing-when-uffd-enabled-fix.patch removed from -mm tree

[folded-merged] hugetlb-userfaultfd-forbid-huge-pmd-sharing-when-uffd-enabled-fix.patch removed from -mm tree

[akpm]

The patch titled
     Subject: mm/hugetlb: fix build with !ARCH_WANT_HUGE_PMD_SHARE
has been removed from the -mm tree.  Its filename was
     hugetlb-userfaultfd-forbid-huge-pmd-sharing-when-uffd-enabled-fix.patch

This patch was dropped because it was folded into hugetlb-userfaultfd-forbid-huge-pmd-sharing-when-uffd-enabled.patch

------------------------------------------------------
From: Peter Xu <peterx@redhat.com>
Subject: mm/hugetlb: fix build with !ARCH_WANT_HUGE_PMD_SHARE

want_pmd_share() is undefined with !ARCH_WANT_HUGE_PMD_SHARE since it's
put by accident into a "#ifdef ARCH_WANT_HUGE_PMD_SHARE" block.  Moving it
out won't work either since vma_shareable() is only defined within the
block.  Define it for !ARCH_WANT_HUGE_PMD_SHARE instead.

Link: https://lkml.kernel.org/r/20210310185359.88297-1-peterx@redhat.com
Fixes: 5b109cc1cdcc ("hugetlb/userfaultfd: forbid huge pmd sharing when uffd enabled")
Signed-off-by: Peter Xu <peterx@redhat.com>
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/hugetlb.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

--- a/mm/hugetlb.c~hugetlb-userfaultfd-forbid-huge-pmd-sharing-when-uffd-enabled-fix
+++ a/mm/hugetlb.c
@@ -5328,9 +5328,6 @@ static bool vma_shareable(struct vm_area
 
 bool want_pmd_share(struct vm_area_struct *vma, unsigned long addr)
 {
-#ifndef CONFIG_ARCH_WANT_HUGE_PMD_SHARE
-	return false;
-#endif
 #ifdef CONFIG_USERFAULTFD
 	if (uffd_disable_huge_pmd_share(vma))
 		return false;
@@ -5475,6 +5472,11 @@ void adjust_range_if_pmd_sharing_possibl
 				unsigned long *start, unsigned long *end)
 {
 }
+
+bool want_pmd_share(struct vm_area_struct *vma, unsigned long addr)
+{
+	return false;
+}
 #endif /* CONFIG_ARCH_WANT_HUGE_PMD_SHARE */
 
 #ifdef CONFIG_ARCH_WANT_GENERAL_HUGETLB
_

Patches currently in -mm which might be from peterx@redhat.com are

hugetlb-pass-vma-into-huge_pte_alloc-and-huge_pmd_share.patch
hugetlb-userfaultfd-forbid-huge-pmd-sharing-when-uffd-enabled.patch
mm-hugetlb-move-flush_hugetlb_tlb_range-into-hugetlbh.patch
hugetlb-userfaultfd-unshare-all-pmds-for-hugetlbfs-when-register-wp.patch
userfaultfd-add-minor-fault-registration-mode-fix.patch
mm-hugetlb-fix-f_seal_future_write.patch
mm-hugetlb-fix-cow-where-page-writtable-in-child.patch