Revert "mm: slub: Memory allocated by kstrdup should be freed, when kmalloc(kmem_size, GFP_KERNEL) is failed."

This reverts commit ec601d8dd1257bfc7aae531bd2f807006440c713.
Revert "mm: slub: Try setting slub_max_order to zero"

This reverts commit 976d060259308ee25c0c5a6a8abe259f299d1c47.
Stable Version