Reduce build time in some cases by removing unnecessary include statements for <asm/bootparam.h>. Reorganize some header files accordingly. While working on the kernel's boot-up graphics, I noticed that touching include/linux/screen_info.h triggers a complete rebuild of the kernel on x86. It turns out that the architecture's PCI and EFI headers include <asm/bootparam.h>, which depends on <linux/screen_info.h>. But none of the drivers have any business with boot parameters or the screen_info state. The patchset moves code from bootparam.h and efi.h into separate header files and removes obsolete include statements on x86. I did make allmodconfig make -j28 touch include/linux/screen_info.h time make -j28 to measure the time it takes to rebuild. Results without the patchset are around 20 minutes. real 20m46,705s user 354m29,166s sys 28m27,359s And with the patchset applied it goes down to less than one minute. real 0m56,643s user 4m0,661s sys 0m32,956s The test system is an Intel i5-13500. v5: * silence clang warnings for real-mode code (Nathan) * revert boot/compressed/misc.h (kernel test robot) v4: * fix fwd declaration in compressed/misc.h (Ard) v3: * keep setup_header in bootparam.h (Ard) * implement arch_ima_efi_boot_mode() in source file (Ard) v2: * only keep struct boot_params in bootparam.h (Ard) * simplify arch_ima_efi_boot_mode define (Ard) * updated cover letter Thomas Zimmermann (4): arch/x86: Move UAPI setup structures into setup_data.h arch/x86: Move internal setup_data structures into setup_data.h arch/x86: Implement arch_ima_efi_boot_mode() in source file arch/x86: Do not include <asm/bootparam.h> in several files arch/x86/Makefile | 3 + arch/x86/boot/compressed/acpi.c | 2 + arch/x86/boot/compressed/cmdline.c | 2 + arch/x86/boot/compressed/efi.c | 2 + arch/x86/boot/compressed/efi.h | 9 --- arch/x86/boot/compressed/pgtable_64.c | 1 + arch/x86/boot/compressed/sev.c | 1 + arch/x86/include/asm/efi.h | 14 +---- arch/x86/include/asm/kexec.h | 1 - arch/x86/include/asm/mem_encrypt.h | 2 +- arch/x86/include/asm/pci.h | 13 ---- arch/x86/include/asm/setup_data.h | 32 ++++++++++ arch/x86/include/asm/sev.h | 3 +- arch/x86/include/asm/x86_init.h | 2 - arch/x86/include/uapi/asm/bootparam.h | 72 +--------------------- arch/x86/include/uapi/asm/setup_data.h | 83 ++++++++++++++++++++++++++ arch/x86/kernel/crash.c | 1 + arch/x86/kernel/sev-shared.c | 2 + arch/x86/platform/efi/efi.c | 5 ++ arch/x86/platform/pvh/enlighten.c | 1 + arch/x86/xen/enlighten_pvh.c | 1 + arch/x86/xen/vga.c | 1 - 22 files changed, 143 insertions(+), 110 deletions(-) create mode 100644 arch/x86/include/asm/setup_data.h create mode 100644 arch/x86/include/uapi/asm/setup_data.h -- 2.43.0
