On Wed, Jul 08, 2015 at 07:14:36PM +0200, Paolo Pisati wrote:
Adding Josh Triplett since he was interested in MCA removal for the kernel
tinification project, and slightly change
the subject line.
> Is sys_desc_table still used anywhere? It seems not:
>
> arch/x86/boot/mca.c::query_mca()
> ...
> copy_from_fs(&boot_params.sys_desc_table, oreg.bx, len);
> ...
>
> arch/x86/kernel/setup.c::setup_arch()
> ...
> if (boot_params.sys_desc_table.length != 0) {
> machine_id = boot_params.sys_desc_table.table[0];
> machine_submodel_id = boot_params.sys_desc_table.table[1];
> BIOS_revision = boot_params.sys_desc_table.table[2];
> }
> ...
>
> $ git grep machine_id
> ...
> arch/x86/include/asm/processor.h:extern unsigned int machine_id;
> arch/x86/kernel/setup.c:unsigned int machine_id;
> arch/x86/kernel/setup.c: machine_id =
> boot_params.sys_desc_table.table[0];
> ...
>
> $ git grep machine_submodel_id
> arch/x86/include/asm/processor.h:extern unsigned int machine_submodel_id;
> arch/x86/kernel/setup.c:unsigned int machine_submodel_id;
> arch/x86/kernel/setup.c: machine_submodel_id =
> boot_params.sys_desc_table.table[1];
>
> $ git grep BIOS_revision
> arch/x86/include/asm/processor.h:extern unsigned int BIOS_revision;
> arch/x86/kernel/setup.c:unsigned int BIOS_revision;
> arch/x86/kernel/setup.c: BIOS_revision =
> boot_params.sys_desc_table.table[2];
>
> Compile tested with i386_defconfig, x86_64_defconfig and allyesconfig.
>
> Paolo Pisati (1):
> MCA: garbage collect sys_desc_table
>
> Documentation/x86/zero-page.txt | 1 -
> arch/x86/boot/Makefile | 2 +-
> arch/x86/boot/boot.h | 3 ---
> arch/x86/boot/compressed/eboot.c | 4 ----
> arch/x86/boot/main.c | 3 ---
> arch/x86/boot/mca.c | 38
> -----------------------------------
> arch/x86/include/asm/processor.h | 8 --------
> arch/x86/include/uapi/asm/bootparam.h | 19 +++++++-----------
> arch/x86/kernel/kexec-bzimage64.c | 3 ---
> arch/x86/kernel/setup.c | 5 -----
> 10 files changed, 8 insertions(+), 78 deletions(-)
> delete mode 100644 arch/x86/boot/mca.c
>
> --
> 2.1.4
>
--
bye,
p.
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