From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> The patches convert riscv to use the generic entry infrastructure from kernel/entry/*. Add independent irq stacks (IRQ_STACKS) for percpu to prevent kernel stack overflows. Add the HAVE_SOFTIRQ_ON_OWN_STACK feature for the IRQ_STACKS config. You can try it directly with [1]. [1] https://github.com/guoren83/linux/tree/generic_entry_v2 Changes in V2: - Fixup compile error by include "riscv: ptrace: Remove duplicate operation" https://lore.kernel.org/linux-riscv/20220903162328.1952477-2-guoren@xxxxxxxxxx/T/#u - Fixup compile warning Reported-by: kernel test robot <lkp@xxxxxxxxx> - Add test repo link in cover letter Guo Ren (6): riscv: ptrace: Remove duplicate operation riscv: convert to generic entry riscv: Support HAVE_IRQ_EXIT_ON_IRQ_STACK riscv: Support HAVE_SOFTIRQ_ON_OWN_STACK riscv: elf_kexec: Fixup compile warning riscv: compat_syscall_table: Fixup compile warning arch/riscv/Kconfig | 10 + arch/riscv/include/asm/csr.h | 1 - arch/riscv/include/asm/entry-common.h | 8 + arch/riscv/include/asm/irq.h | 3 + arch/riscv/include/asm/ptrace.h | 10 +- arch/riscv/include/asm/stacktrace.h | 5 + arch/riscv/include/asm/syscall.h | 6 + arch/riscv/include/asm/thread_info.h | 15 +- arch/riscv/include/asm/vmap_stack.h | 28 +++ arch/riscv/kernel/Makefile | 1 + arch/riscv/kernel/elf_kexec.c | 4 + arch/riscv/kernel/entry.S | 255 +++++--------------------- arch/riscv/kernel/irq.c | 75 ++++++++ arch/riscv/kernel/ptrace.c | 41 ----- arch/riscv/kernel/signal.c | 21 +-- arch/riscv/kernel/sys_riscv.c | 26 +++ arch/riscv/kernel/traps.c | 11 ++ arch/riscv/mm/fault.c | 12 +- 18 files changed, 250 insertions(+), 282 deletions(-) create mode 100644 arch/riscv/include/asm/entry-common.h create mode 100644 arch/riscv/include/asm/vmap_stack.h -- 2.36.1
