The macro include/linux/mmzone.h:get_pageblock_migratetype() uses
the symbol get_pfnblock_flags_mask, which is not exported. That macro is
used within the kmem and page_ref trace events to trace the migrate type
of the target page.
Exporting this symbol to GPL modules allows GPL kernel tracers to be
implemented as modules.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: linux-mm@xxxxxxxxx
---
mm/page_alloc.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 114c56c3685d..390febb028a0 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -501,6 +501,7 @@ unsigned long get_pfnblock_flags_mask(struct page *page, unsigned long pfn,
{
return __get_pfnblock_flags_mask(page, pfn, end_bitidx, mask);
}
+EXPORT_SYMBOL_GPL(get_pfnblock_flags_mask);
static __always_inline int get_pfnblock_migratetype(struct page *page, unsigned long pfn)
{
--
2.17.1
