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-rw-r--r--arch/um/include/os.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index d3d1bc6074e..5fb84e889b2 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -205,6 +205,8 @@ extern int os_map_memory(void *virt, int fd, unsigned long long off,
extern int os_protect_memory(void *addr, unsigned long len,
int r, int w, int x);
extern int os_unmap_memory(void *addr, int len);
+extern int os_drop_memory(void *addr, int length);
+extern int can_drop_memory(void);
extern void os_flush_stdout(void);
/* tt.c