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-rw-r--r--mm/internal.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/internal.h b/mm/internal.h
index f6f3353b0868..a37e5b6f9d25 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -442,7 +442,7 @@ extern u64 hwpoison_filter_flags_value;
extern u64 hwpoison_filter_memcg;
extern u32 hwpoison_filter_enable;
-extern unsigned long vm_mmap_pgoff(struct file *, unsigned long,
+extern unsigned long __must_check vm_mmap_pgoff(struct file *, unsigned long,
unsigned long, unsigned long,
unsigned long, unsigned long);