Hey everybody, this the third iteration of the panic notifiers fixes/clean-ups; V2 available at: https://lore.kernel.org/lkml/20220719195325.402745-1-gpiccoli@xxxxxxxxxx/ V1 (including the refactor) available at: https://lore.kernel.org/lkml/20220427224924.592546-1-gpiccoli@xxxxxxxxxx/ There wasn't much change here compared to V2 (the specifics are in the patches), but a global change is that I've rebased against 6.0-rc1. One patch got merged in -next, another one was re-submit in a standalone format (requested by maintainer), so both of these are not here anymore. As usual, tested this series building for all affected architecture/drivers and also through some boot/runtime tests; below the test "matrix" used: Build tests (using cross-compilers): alpha, arm, arm64, parisc, um, x86_64. Boot/Runtime tests: x86_64 (QEMU guests and Steam Deck). Here is the link with the .config files used: https://people.igalia.com/gpiccoli/panic_notifiers_configs/6.0-rc1/ About the merge strategy: I've noticed there is a difference in maintainers preferences (and my preference as well), so I see 3 strategies for merge: (a) Maintainers pick patches that are good from the series and merge in their trees; (b) Some maintainer would pick the whole series and merge, at once, given that everything is fine/ack/reviewed. (c) I must re-send patches individually once they are reviewed/acked, as standalone patches to the relevant maintainers, so they can merge it in their trees. I'm willing to do what's best for everybody - (a) is my choice when possible, (b) seems to stall things and potentially cause conflicts, (c) seems to be the compromise. I'll do that as per preference of the respective maintainers. As usual, reviews / comments are always welcome, thanks in advance for them! Cheers, Guilherme Guilherme G. Piccoli (11): ARM: Disable FIQs (but not IRQs) on CPUs shutdown paths notifier: Add panic notifiers info and purge trailing whitespaces alpha: Clean-up the panic notifier code um: Improve panic notifiers consistency and ordering parisc: Replace regular spinlock with spin_trylock on panic path tracing: Improve panic/die notifiers notifiers: Add tracepoints to the notifiers infrastructure EDAC/altera: Skip the panic notifier if kdump is loaded video/hyperv_fb: Avoid taking busy spinlock on panic path drivers/hv/vmbus, video/hyperv_fb: Untangle and refactor Hyper-V panic notifiers panic: Fixes the panic_print NMI backtrace setting arch/alpha/kernel/setup.c | 36 +++++----- arch/arm/kernel/machine_kexec.c | 2 + arch/arm/kernel/smp.c | 5 +- arch/parisc/include/asm/pdc.h | 1 + arch/parisc/kernel/firmware.c | 27 ++++++-- arch/um/drivers/mconsole_kern.c | 7 +- arch/um/kernel/um_arch.c | 8 +-- drivers/edac/altera_edac.c | 16 +++-- drivers/hv/ring_buffer.c | 13 ++++ drivers/hv/vmbus_drv.c | 109 +++++++++++++++++++------------ drivers/parisc/power.c | 17 +++-- drivers/video/fbdev/hyperv_fb.c | 16 ++++- include/linux/hyperv.h | 2 + include/linux/notifier.h | 8 ++- include/trace/events/notifiers.h | 69 +++++++++++++++++++ kernel/notifier.c | 6 ++ kernel/panic.c | 47 +++++++------ kernel/trace/trace.c | 55 ++++++++-------- 18 files changed, 302 insertions(+), 142 deletions(-) create mode 100644 include/trace/events/notifiers.h -- 2.37.2
