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[0/8] powerpc: improve copy_thread

Message ID 20230131165534.601490-1-npiggin@gmail.com (mailing list archive)
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Series powerpc: improve copy_thread | expand

Message

Nicholas Piggin Jan. 31, 2023, 4:55 p.m. UTC 
The way copy_thread works, particularly with kernel threads and kernel
created user threads is a bit muddled and confusing. This series tries
to straighten things out a bit.

Thanks,
Nick

Nicholas Piggin (8):
  powerpc: copy_thread remove unused pkey code
  powerpc: copy_thread make ret_from_fork register setup consistent
  powerpc: use switch frame for ret_from_kernel_thread parameters
  powerpc/64: ret_from_fork avoid restoring regs twice
  powerpc: copy_thread differentiate kthreads and user mode threads
  powerpc: differentiate kthread from user kernel thread start
  powerpc: copy_thread don't set _TIF_RESTOREALL
  powerpc: copy_thread don't set ppr in user interrupt frame regs

 arch/powerpc/kernel/entry_32.S     |  23 +++++-
 arch/powerpc/kernel/interrupt_64.S |  28 ++++++-
 arch/powerpc/kernel/process.c      | 121 ++++++++++++++++-------------
 3 files changed, 110 insertions(+), 62 deletions(-)