Refer old discussion at https://lore.kernel.org/lkml/20200422152656.GF676@willie-the-truck/T/#m802eaf33efd6f8d575939d157301b35ac0d4a64f And https://github.com/KSPP/linux/issues/35 This series refactors CONFIG_DEBUG_WX for the 5 architectures implementing CONFIG_GENERIC_PTDUMP First rename stuff in ARM which uses similar names while not implementing CONFIG_GENERIC_PTDUMP. Then define a generic version of debug_checkwx() that calls ptdump_check_wx() when CONFIG_DEBUG_WX is set. Call it immediately after calling mark_rodata_ro() instead of calling it at the end of every mark_rodata_ro(). Then implement a debugfs attribute that can be used to trigger a W^X test at anytime and regardless of CONFIG_DEBUG_WX Christophe Leroy (4): arm: ptdump: Rename CONFIG_DEBUG_WX to CONFIG_ARM_DEBUG_WX arm64, powerpc, riscv, s390, x86: Refactor CONFIG_DEBUG_WX powerpc,s390: Define ptdump_check_wx() regardless of CONFIG_DEBUG_WX ptdump: add check_wx_pages debugfs attribute arch/arm/Kconfig.debug | 2 +- arch/arm/include/asm/ptdump.h | 6 +++--- arch/arm64/include/asm/ptdump.h | 7 ------- arch/arm64/mm/mmu.c | 2 -- arch/powerpc/mm/mmu_decl.h | 6 ------ arch/powerpc/mm/pgtable_32.c | 4 ---- arch/powerpc/mm/pgtable_64.c | 3 --- arch/powerpc/mm/ptdump/ptdump.c | 10 ++++++---- arch/riscv/include/asm/ptdump.h | 22 ---------------------- arch/riscv/mm/init.c | 3 --- arch/riscv/mm/ptdump.c | 1 - arch/s390/include/asm/ptdump.h | 14 -------------- arch/s390/mm/dump_pagetables.c | 8 ++------ arch/s390/mm/init.c | 2 -- arch/x86/include/asm/pgtable.h | 3 +-- arch/x86/mm/dump_pagetables.c | 3 +++ arch/x86/mm/init_32.c | 2 -- arch/x86/mm/init_64.c | 2 -- include/linux/ptdump.h | 7 +++++++ init/main.c | 2 ++ mm/ptdump.c | 19 +++++++++++++++++++ 21 files changed, 44 insertions(+), 84 deletions(-) delete mode 100644 arch/riscv/include/asm/ptdump.h delete mode 100644 arch/s390/include/asm/ptdump.h -- 2.41.0
