util: document why we have alloca_align()

2014-12-12 13:35:32 +01:00
parent ae6c3cc009
commit 257224b0cd
1 changed files with 1 additions and 0 deletions
@@ -883,6 +883,7 @@ int unlink_noerrno(const char *path);
                (void *) memset(_new_, 0, _len_);       \
        })

+/* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */
 #define alloca_align(size, align)                                       \
        ({                                                              \
                void *_ptr_;                                            \