[GIT PULL] parisc architecture fixes for v6.4-rc4

[Helge Deller]

Hi Linus,

please pull the parisc architecture fixes and updates for 6.4-rc4:

Quite a bunch of real bugfixes in here and most of them are tagged for
backporting: A fix for cache flushing from irq context, a kprobes & kgdb
breakpoint handling fix, and a fix in the alternative code patching
function to take care of CPU hotplugging.

parisc now provides LOCKDEP support and comes with a lightweight spinlock
check. Both features helped me to find the cache flush bug.

Additionally writing the AGP gatt has been fixed, the machine allows the
user to reboot after a system halt and arch_sync_dma_for_cpu() has been
optimized for PCXL PCUs.

Thanks,
Helge

---
The following changes since commit 44c026a73be8038f03dbdeef028b642880cf1511:

  Linux 6.4-rc3 (2023-05-21 14:05:48 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux.git tags/parisc-for-6.4-3

for you to fetch changes up to 61e150fb310729c98227a5edf6e4a3619edc3702:

  parisc: Fix flush_dcache_page() for usage from irq context (2023-05-24 19:03:49 +0200)

----------------------------------------------------------------
parisc architecture fixes for kernel v6.4-rc4:

- Fix flush_dcache_page() for usage from irq context
- Handle kprobes breakpoints only in kernel context
- Handle kgdb breakpoints only in kernel context
- Use num_present_cpus() in alternative patching code
- Enable LOCKDEP support
- Add lightweight spinlock checks
- Flush AGP gatt writes and adjust gatt mask in parisc_agp_mask_memory()
- Allow to reboot machine after system halt
- Improve cache flushing for PCXL in arch_sync_dma_for_cpu()

----------------------------------------------------------------
Helge Deller (9):
      parisc: Improve cache flushing for PCXL in arch_sync_dma_for_cpu()
      parisc: Flush gatt writes and adjust gatt mask in parisc_agp_mask_memory()
      parisc: Use num_present_cpus() in alternative patching code
      parisc: Add lightweight spinlock checks
      parisc: Enable LOCKDEP support
      parisc: Allow to reboot machine after system halt
      parisc: Handle kprobes breakpoints only in kernel context
      parisc: Handle kgdb breakpoints only in kernel context
      parisc: Fix flush_dcache_page() for usage from irq context

 arch/parisc/Kconfig                      |  4 ++++
 arch/parisc/Kconfig.debug                | 11 +++++++++
 arch/parisc/include/asm/cacheflush.h     |  4 ++++
 arch/parisc/include/asm/spinlock.h       | 39 ++++++++++++++++++++++++++++----
 arch/parisc/include/asm/spinlock_types.h |  8 +++++--
 arch/parisc/kernel/alternative.c         |  2 +-
 arch/parisc/kernel/cache.c               |  5 ++--
 arch/parisc/kernel/pci-dma.c             | 18 ++++++++++++++-
 arch/parisc/kernel/process.c             | 11 ++++++---
 arch/parisc/kernel/traps.c               | 18 +++++++++++----
 drivers/char/agp/parisc-agp.c            | 15 +++++++++++-
 11 files changed, 116 insertions(+), 19 deletions(-)