Messages in this thread | | | Date | Fri, 10 Jul 2015 11:06:50 +0200 | From | Paolo Pisati <> | Subject | Resend: Re: [PATCH] x86: MCA: garbage collect sys_desc_table |
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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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