On Tue, Mar 7, 2023 at 2:28 AM Thomas Zimmermann <tzimmermann@xxxxxxx> wrote: > > So after module_init is finished, mode_option_buf[] no longer exists? > > Does the __init attribute on a function affect the static variables in > that function? That is an excellent question. https://stackoverflow.com/questions/64558614/what-happens-to-local-static-identifiers-in-init-function I don't think the compiler is naturally aware of whatever section a variable or function is placed in, so it can't really know that mode_option_buf[] is suppose to have a limited lifetime. Either way, the code seems wrong. If mode_option_buf[] is marked as __initdata, then it will disappear before the probe() function is called. If mode_option_buf[] remains resident, then we are wasting 256 bytes.
