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Subject[PATCH] MCA: garbage collect sys_desc_table
Date
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



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