Add container_of and ROUND_UP macros

Needed by follow up commits. container_of is actually
just moved/consolidated to util.h.

Signed-off-by: Bernd Schubert <bschubert@ddn.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/util.h b/lib/util.h
index 508fafb..ed03ad4 100644
--- a/lib/util.h
+++ b/lib/util.h
@@ -30,4 +30,10 @@ static inline uint64_t fuse_higher_32_bits(uint64_t nr)
 #define FUSE_VAR_UNUSED(var) (__attribute__((unused)) var)
 #endif
 
+#define container_of(ptr, type, member)                      \
+	({                                                   \
+		unsigned long __mptr = (unsigned long)(ptr); \
+		((type *)(__mptr - offsetof(type, member))); \
+	})
+
 #endif