Hi, hillf, On Tue, Apr 22, 2014 at 2:47 PM, Hillf Danton <dhillf@xxxxxxxxx> wrote: > But other fields still missed, if any. Fair? yep, it is not fair. Sure for this global variable struct, if not initailized, its all fields will be initialized to 0 or null(depending on its type). The point here is no to deprive the rights of compiler/linker of doing this initialization, it is mainly for documentation reason. Actually this field's value would affect how ->css_alloc should implemented. Concretely, if early_init is nonzero, then ->css_alloc *must not* call kzalloc, because in cgroup implementation, ->css_alloc will be called earlier before mm_init(). I don't think that the value of one field(early_init) has a so subtle restrition on the another field(css_alloc) is a good thing, but since it is there, docment it should be needed. Thanks, Jianyu Zhan -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>