question about boot_params global variables

jim.cromie at jim.cromie at
Mon Nov 14 11:22:45 EST 2022

On Tue, Aug 16, 2022 at 4:10 AM shiyu chou <shiyu2010310 at> wrote:
> Hello all:
> In arch x86 directory I found two global variables with the same name(master branch):
> 1.arch/x86/boot/main.c
> near line 18: struct boot_params boot_params __attribute__((aligned(16)));
> 2.arch/x86/kernel/setup.c
> near line 75: struct boot_params boot_params;
> Is that wrong to define two global variables with the same name? And when use extern to reference the variable,which one did it reference?

hi, did you figure out a satisfactory answer ?

what happens when you build with W=1 ?

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