On Tue, Jan 8, 2013 at 11:08 AM, Rahul Bedarkar <rpal143@gmail.com> wrote:
>
> Ok. in init/main.c we call do_basic_setup(). Where do_initcalls call each of init functions from __early_initcall_end to __initcall_end. But I don't know from where these values gets initialized.

If you look here:
http://lxr.linux.no/#linux+v3.7.1/include/linux/init.h#L279

module_init is mapped to __initcall, which is in turn mapped to device_initcall, which sets up a pointer in a section called .initcall6.init

If you then look in the kernel linker script:
http://lxr.linux.no/#linux+v3.7.1/arch/arm/kernel/vmlinux.lds.S#L175

INIT_CALLS is defined here:
http://lxr.linux.no/#linux+v3.7.1/include/asm-generic/vmlinux.lds.h#L633

and it defines the __initcall_start and __initcall_end symbols.