Messages in this thread Patch in this message | | | Date | Mon, 12 Apr 2021 10:00:19 +0200 | From | Peter Zijlstra <> | Subject | [PATCH 7/7] mm: Unexport apply_to_page_range() |
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Now that all module users of apply_to_page_range() have been removed, unexport this function.
This is an unsafe function in that it gives direct access to the page-tables.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> --- mm/memory.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/mm/memory.c +++ b/mm/memory.c @@ -2544,13 +2544,14 @@ static int __apply_to_page_range(struct /* * Scan a region of virtual memory, filling in page tables as necessary * and calling a provided function on each leaf page table. + * + * DO NOT EXPORT; this hands out our page-tables on a platter. */ int apply_to_page_range(struct mm_struct *mm, unsigned long addr, unsigned long size, pte_fn_t fn, void *data) { return __apply_to_page_range(mm, addr, size, fn, data, true); } -EXPORT_SYMBOL_GPL(apply_to_page_range); /* * Scan a region of virtual memory, calling a provided function on @@ -2558,6 +2559,8 @@ EXPORT_SYMBOL_GPL(apply_to_page_range); * * Unlike apply_to_page_range, this does _not_ fill in page tables * where they are absent. + * + * DO NOT EXPORT; this hands out our page-tables on a platter. */ int apply_to_existing_page_range(struct mm_struct *mm, unsigned long addr, unsigned long size, pte_fn_t fn, void *data)
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