>> I know we have CONFIG_X86_64 and CONFIG_X86_32 for x86 architecture but
> how do I exactly check it in my module code?

>>I'm totally failing to understand why '#ifdef CONFIG_X86_64' isn't sufficient?

'#ifdef CONFIG_X86_64 is working for me but I couldn't find it being used by drivers in the kernel source tree so I guessed people were doing it by some better, smarter method.

Regards,

Saket Sinha