[0/4] riscv: entry: further clean up and VMAP_STACK fix

Message

Jisheng Zhang Sept. 25, 2022, 5:53 p.m. UTC

I planed to do similar generic entry transaction as Guo Ren did[1], and
I have some commits in local. Since Guo has sent out the series, so I
dropped my version and just provide those in my local repo but missing
in Guo's series. However, this doesn't mean this series depends on
Guo's series, in fact except the first one, the remaining three patches
are independent on generic entry.

NOTE: patch4 can also clean up arch/riscv/kernel/mcount-dyn.S as well
but there's a trivial difference in the context saving, I dunno whether
is it better to clean up mcount-dyn.S too, any suggestions are welcome.

[1]https://lore.kernel.org/linux-riscv/[e-mail]/T/#t

Jisheng Zhang (4):
  riscv: remove extra level wrappers of trace_hardirqs_{on,off}
  riscv: consolidate ret_from_kernel_thread into ret_from_fork
  riscv: fix race when vmap stack overflow and remove shadow_stack
  riscv: entry: consolidate general regs saving into save_gp

 arch/riscv/include/asm/asm-prototypes.h |   1 -
 arch/riscv/include/asm/thread_info.h    |   4 +-
 arch/riscv/kernel/Makefile              |   2 -
 arch/riscv/kernel/asm-offsets.c         |   1 +
 arch/riscv/kernel/entry.S               | 150 +++++++-----------------
 arch/riscv/kernel/process.c             |   5 +-
 arch/riscv/kernel/trace_irq.c           |  27 -----
 arch/riscv/kernel/trace_irq.h           |  11 --
 arch/riscv/kernel/traps.c               |  15 +--
 9 files changed, 47 insertions(+), 169 deletions(-)
 delete mode 100644 arch/riscv/kernel/trace_irq.c
 delete mode 100644 arch/riscv/kernel/trace_irq.h