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_v3 V3: - Fixup CONFIG_COMPAT=n compile error - Add THREAD_SIZE_ORDER config - Optimize elf_kexec.c warning fixup - Add static to irq_stack_ptr definition V2: Link: https://lore.kernel.org/linux-riscv/20220904072637.8619-1-guoren@xxxxxxxxxx/ - Fixup compile error by include "riscv: ptrace: Remove duplicate operation" - Fixup compile warning Reported-by: kernel test robot <lkp@xxxxxxxxx> - Add test repo link in cover letter V1: Link: https://lore.kernel.org/linux-riscv/20220903163808.1954131-1-guoren@xxxxxxxxxx/ Guo Ren (7): riscv: elf_kexec: Fixup compile warning riscv: compat_syscall_table: Fixup compile warning 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: Add config of thread stack size arch/riscv/Kconfig | 19 ++ 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 | 19 +- arch/riscv/include/asm/vmap_stack.h | 28 +++ arch/riscv/kernel/Makefile | 1 + arch/riscv/kernel/elf_kexec.c | 2 +- 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 | 27 +++ arch/riscv/kernel/traps.c | 11 ++ arch/riscv/mm/fault.c | 12 +- 18 files changed, 259 insertions(+), 285 deletions(-) create mode 100644 arch/riscv/include/asm/entry-common.h create mode 100644 arch/riscv/include/asm/vmap_stack.h -- 2.36.1
