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-rw-r--r--include/linux/vmalloc.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index c2b10ca..89338b4 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -58,6 +58,13 @@ void vmalloc_sync_all(void);
/*
* Lowlevel-APIs (not for driver use!)
*/
+
+static inline size_t get_vm_area_size(const struct vm_struct *area)
+{
+ /* return actual size without guard page */
+ return area->size - PAGE_SIZE;
+}
+
extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
unsigned long start, unsigned long end);
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