list: fix an issue with android build using clang
Sorry, I don't understand the android build system enough to say *which*
version of clang this effects, but either "clang-2812033" or
"clang-3016494" (probably the later).
But when 'sample' is undefined (ie. unitialized variable), the result is
not as well defined as it is with gcc. Instead use a typeof() cast with
a defined value (ie. zero).
This fixes a crash that was reported on android.
Reported-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Rob Clark <robclark@freedesktop.org>
diff --git a/util_double_list.h b/util_double_list.h
index 5d01f52..7e48b26 100644
--- a/util_double_list.h
+++ b/util_double_list.h
@@ -110,7 +110,7 @@
#ifndef container_of
#define container_of(ptr, sample, member) \
(void *)((char *)(ptr) \
- - ((char *)&(sample)->member - (char *)(sample)))
+ - ((char *)&((typeof(sample))0)->member))
#endif
#define LIST_FOR_EACH_ENTRY(pos, head, member) \
