[RFC PATCH v2 2/5] mmap: make mlock_future_check() global

From: Mike Rapoport
Date: Mon Jul 06 2020 - 13:21:12 EST


From: Mike Rapoport <rppt@xxxxxxxxxxxxx>

It will be used by the upcoming secret memory implementation.

Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
---
mm/internal.h | 3 +++
mm/mmap.c | 5 ++---
2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/mm/internal.h b/mm/internal.h
index 9886db20d94f..af0a92f8f6bc 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -349,6 +349,9 @@ static inline void munlock_vma_pages_all(struct vm_area_struct *vma)
extern void mlock_vma_page(struct page *page);
extern unsigned int munlock_vma_page(struct page *page);

+extern int mlock_future_check(struct mm_struct *mm, unsigned long flags,
+ unsigned long len);
+
/*
* Clear the page's PageMlocked(). This can be useful in a situation where
* we want to unconditionally remove a page from the pagecache -- e.g.,
diff --git a/mm/mmap.c b/mm/mmap.c
index 59a4682ebf3f..4dd40a4fedfb 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1310,9 +1310,8 @@ static inline unsigned long round_hint_to_min(unsigned long hint)
return hint;
}

-static inline int mlock_future_check(struct mm_struct *mm,
- unsigned long flags,
- unsigned long len)
+int mlock_future_check(struct mm_struct *mm, unsigned long flags,
+ unsigned long len)
{
unsigned long locked, lock_limit;

--
2.26.2