[Qemu-devel] [PATCH 03/13] add container_of() macro to osdep.h

[Gerd Hoffmann]

>From linux kernel sources, xen bits will use it, put it
into a place where others can see and use it too ;)

Signed-off-by: Gerd Hoffmann <address@hidden>
---
 osdep.h |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/osdep.h b/osdep.h
index 6312e7a..09ebace 100644
--- a/osdep.h
+++ b/osdep.h
@@ -23,6 +23,10 @@
 #define unlikely(x)   __builtin_expect(!!(x), 0)
 #endif
 
+#define container_of(ptr, type, member) ({                      \
+        const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
+        (type *)( (char *)__mptr - offsetof(type,member) );})
+
 #ifndef MIN
 #define MIN(a, b) (((a) < (b)) ? (a) : (b))
 #endif
-- 
1.5.5.1