[merged mm-stable] arch-powerpc-teach-book3s64-arch_get_unmapped_area_topdown-to-handle-hugetlb-mappings.patch removed from -mm tree

[Andrew Morton <akpm@linux-foundation.org>]

The quilt patch titled
     Subject: arch/powerpc: teach book3s64 arch_get_unmapped_area{_topdown} to handle hugetlb mappings
has been removed from the -mm tree.  Its filename was
     arch-powerpc-teach-book3s64-arch_get_unmapped_area_topdown-to-handle-hugetlb-mappings.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Oscar Salvador <osalvador@suse.de>
Subject: arch/powerpc: teach book3s64 arch_get_unmapped_area{_topdown} to handle hugetlb mappings
Date: Mon, 7 Oct 2024 09:50:33 +0200

We want to stop special casing hugetlb mappings and make them go through
generic channels, so teach arch_get_unmapped_area{_topdown} to handle
those.

Reshuffle file_to_psize() definition so arch_get_unmapped_area{_topdown}
can make use of it.

Link: https://lkml.kernel.org/r/20241007075037.267650-6-osalvador@suse.de
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Cc: David Hildenbrand <david@redhat.com>
Cc: Donet Tom <donettom@linux.ibm.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Peter Xu <peterx@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/powerpc/mm/book3s64/slice.c |   40 +++++++++++++++++++++--------
 1 file changed, 30 insertions(+), 10 deletions(-)

--- a/arch/powerpc/mm/book3s64/slice.c~arch-powerpc-teach-book3s64-arch_get_unmapped_area_topdown-to-handle-hugetlb-mappings
+++ a/arch/powerpc/mm/book3s64/slice.c
@@ -633,6 +633,20 @@ return_addr:
 }
 EXPORT_SYMBOL_GPL(slice_get_unmapped_area);
 
+#ifdef CONFIG_HUGETLB_PAGE
+static int file_to_psize(struct file *file)
+{
+	struct hstate *hstate = hstate_file(file);
+
+	return shift_to_mmu_psize(huge_page_shift(hstate));
+}
+#else
+static int file_to_psize(struct file *file)
+{
+	return 0;
+}
+#endif
+
 unsigned long arch_get_unmapped_area(struct file *filp,
 				     unsigned long addr,
 				     unsigned long len,
@@ -640,11 +654,17 @@ unsigned long arch_get_unmapped_area(str
 				     unsigned long flags,
 				     vm_flags_t vm_flags)
 {
+	unsigned int psize;
+
 	if (radix_enabled())
 		return generic_get_unmapped_area(filp, addr, len, pgoff, flags, vm_flags);
 
-	return slice_get_unmapped_area(addr, len, flags,
-				       mm_ctx_user_psize(&current->mm->context), 0);
+	if (filp && is_file_hugepages(filp))
+		psize = file_to_psize(filp);
+	else
+		psize = mm_ctx_user_psize(&current->mm->context);
+
+	return slice_get_unmapped_area(addr, len, flags, psize, 0);
 }
 
 unsigned long arch_get_unmapped_area_topdown(struct file *filp,
@@ -654,11 +674,17 @@ unsigned long arch_get_unmapped_area_top
 					     const unsigned long flags,
 					     vm_flags_t vm_flags)
 {
+	unsigned int psize;
+
 	if (radix_enabled())
 		return generic_get_unmapped_area_topdown(filp, addr0, len, pgoff, flags, vm_flags);
 
-	return slice_get_unmapped_area(addr0, len, flags,
-				       mm_ctx_user_psize(&current->mm->context), 1);
+	if (filp && is_file_hugepages(filp))
+		psize = file_to_psize(filp);
+	else
+		psize = mm_ctx_user_psize(&current->mm->context);
+
+	return slice_get_unmapped_area(addr0, len, flags, psize, 1);
 }
 
 unsigned int notrace get_slice_psize(struct mm_struct *mm, unsigned long addr)
@@ -789,12 +815,6 @@ unsigned long vma_mmu_pagesize(struct vm
 	return 1UL << mmu_psize_to_shift(get_slice_psize(vma->vm_mm, vma->vm_start));
 }
 
-static int file_to_psize(struct file *file)
-{
-	struct hstate *hstate = hstate_file(file);
-	return shift_to_mmu_psize(huge_page_shift(hstate));
-}
-
 unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
 					unsigned long len, unsigned long pgoff,
 					unsigned long flags)
_

Patches currently in -mm which might be from osalvador@suse.de are