X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=wrapper%2Fpage_alloc.c;h=2de24f9e07edc62daf1caae51824464f31eeb5ff;hb=60c64030e811165e62a62eb551459dd2416d6ec2;hp=baa8603f2898bc58de87393fad666f8d4ce0dace;hpb=9f36eaed6f91d5897924b551b44d1edd8cee00e2;p=lttng-modules.git

diff --git a/wrapper/page_alloc.c b/wrapper/page_alloc.c
index baa8603f..2de24f9e 100644
--- a/wrapper/page_alloc.c
+++ b/wrapper/page_alloc.c
@@ -52,6 +52,26 @@ int wrapper_get_pfnblock_flags_mask_init(void)
 		return -1;
 	return 0;
 }
+EXPORT_SYMBOL_GPL(wrapper_get_pfnblock_flags_mask_init);
+
+/*
+ * Canary function to check for 'get_pfnblock_flags_mask()' at compile time.
+ *
+ * From 'include/linux/pageblock-flags.h':
+ *
+ *   unsigned long get_pfnblock_flags_mask(struct page *page,
+ *                                         unsigned long pfn,
+ *                                         unsigned long end_bitidx,
+ *                                         unsigned long mask);
+ */
+__attribute__((unused)) static
+unsigned long __canary__get_pfnblock_flags_mask(struct page *page,
+						unsigned long pfn,
+						unsigned long end_bitidx,
+						unsigned long mask)
+{
+	return get_pfnblock_flags_mask(page, pfn, end_bitidx, mask);
+}
 
 #else
 
@@ -94,6 +114,7 @@ int wrapper_get_pageblock_flags_mask_init(void)
 		return -1;
 	return 0;
 }
+EXPORT_SYMBOL_GPL(wrapper_get_pfnblock_flags_mask_init);
 
 #else