On Tue, 25 Aug 2020 08:38:27 +0800 Nicolas Boichat <drinkcat@xxxxxxxxxxxx> wrote: > This already works. I'll be honest, I'm not 100% sure why (and if > fully intentional)... > > The CFLAGS end up in 3 generated assembly files: > # grep -R DISALLOW_TRACE_PRINTK * | grep -v ".cmd:" > arch/x86/kernel/asm-offsets.s:# -imultiarch x86_64-linux-gnu -D > __KERNEL__ -D DISALLOW_TRACE_PRINTK > kernel/bounds.s:# -imultiarch x86_64-linux-gnu -D __KERNEL__ -D > DISALLOW_TRACE_PRINTK > scripts/mod/devicetable-offsets.s:# -D DISALLOW_TRACE_PRINTK > (along with all *.cmd files) > > and I suspect some/all of those force a complete kernel rebuild. Yeah, I believe that the modification of CFLAGS causes a recompile of the entire kernel. Thanks! -- Steve
