Guess, this is trivial question but probably useful to know. void free_initmem(void) { #ifdef CONFIG_HAVE_TCM extern char __tcm_start, __tcm_end; totalram_pages += free_area(__phys_to_pfn(__pa(&__tcm_start)), __phys_to_pfn(__pa(&__tcm_end)), "TCM link"); #endif #ifndef CONFIG_HOTPLUG_CPU if (!machine_is_integrator() && !machine_is_cintegrator()) totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)), __phys_to_pfn(__pa(__init_end)), "init"); #endif } Here i don't see any printk information for specifying how much memory is freed. Other architectures do have this printk e.g kernel/arch/ia64/mm/init.c +169 While checking this excellent answer[1] given by rene i found that arm is missing this or may be i am missing something probably this information i can find it somewhere else also. Intention was to add __devinit in my probe function and out of curiosity how much i am saving. [1]http://www.spinics.net/lists/newbies/msg29197.html