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From: peterx@redhat.com
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Subject: [PATCH v3 02/12] mm/hugetlb: Declare hugetlbfs_pagecache_present() non-static
Date: Thu, 21 Mar 2024 18:07:52 -0400
Message-ID: <20240321220802.679544-3-peterx@redhat.com>
In-Reply-To: <20240321220802.679544-1-peterx@redhat.com>
References: <20240321220802.679544-1-peterx@redhat.com>
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From: Peter Xu <peterx@redhat.com>

It will be used outside hugetlb.c soon.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 include/linux/hugetlb.h | 9 +++++++++
 mm/hugetlb.c            | 4 ++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 300de33c6fde..52d9efcf1edf 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -174,6 +174,9 @@ u32 hugetlb_fault_mutex_hash(struct address_space *mapping, pgoff_t idx);
 
 pte_t *huge_pmd_share(struct mm_struct *mm, struct vm_area_struct *vma,
 		      unsigned long addr, pud_t *pud);
+bool hugetlbfs_pagecache_present(struct hstate *h,
+				 struct vm_area_struct *vma,
+				 unsigned long address);
 
 struct address_space *hugetlb_page_mapping_lock_write(struct page *hpage);
 
@@ -1197,6 +1200,12 @@ static inline void hugetlb_register_node(struct node *node)
 static inline void hugetlb_unregister_node(struct node *node)
 {
 }
+
+static inline bool hugetlbfs_pagecache_present(
+    struct hstate *h, struct vm_area_struct *vma, unsigned long address)
+{
+	return false;
+}
 #endif	/* CONFIG_HUGETLB_PAGE */
 
 static inline spinlock_t *huge_pte_lock(struct hstate *h,
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 23ef240ba48a..abec04575c89 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -6129,8 +6129,8 @@ static vm_fault_t hugetlb_wp(struct mm_struct *mm, struct vm_area_struct *vma,
 /*
  * Return whether there is a pagecache page to back given address within VMA.
  */
-static bool hugetlbfs_pagecache_present(struct hstate *h,
-			struct vm_area_struct *vma, unsigned long address)
+bool hugetlbfs_pagecache_present(struct hstate *h,
+				 struct vm_area_struct *vma, unsigned long address)
 {
 	struct address_space *mapping = vma->vm_file->f_mapping;
 	pgoff_t idx = linear_page_index(vma, address);
-- 
2.44.0