Re: v6.12-rt arm updates

["bigeasy@linutronix.de" <bigeasy@linutronix.de>]

On 2026-07-17 13:30:15 [+0000], Daniel Wagner wrote:
> Hi,
Hi,

> I am about to update v6.12-rt and the arm section needs some updates.
> Here is what I am going to do. Please let me know if there is something
> wrong.

not sure how to read this below, I try my best.

> Thanks,
> Daniel
> 
> ###########################################################################
> # ARM
> ###########################################################################
> # https://lore.kernel.org/all/cover.1777964226.git.jan.kiszka@siemens.com/
> 
> # v6.12-stable material relevant for RT but no patches to drop from
> # rt queue:
> # 47c5d569d39d ("ARM: group is_permission_fault() with 
> is_translation_fault()")
> # d5e8be7bea8d ("ARM: allow __do_kernel_fault() to report execution of 
> memory faults")
> # 25ae6a5c473b ("ARM: fix hash_name() fault")
> # fed889edca79 ("ARM: fix branch predictor hardening")

Those few should have entered via -stable.

> # landed in v6.12-stable, thus drop those
> # (commit ids from v6.12-stable):
> # 0001-arm-Disable-jump-label-on-PREEMPT_RT.patch
> # 256d97d3587b ("ARM: 9459/1: Disable jump-label on PREEMPT_RT")
> 
> # arm-Disable-FAST_GUP-on-PREEMPT_RT-if-HIGHPTE-is-als.patch
> # 1b645cd729ef ("ARM: 9461/1: Disable HIGHPTE on PREEMPT_RT kernels")
> 
> # Commits in upstream but not in v6.12-stable
> ARM__enable_irq_in_translation_section_permission_fault_handlers.patch
> #  59e4f3b45b96 ("ARM: ensure interrupts are enabled in __do_user_fault()")

You should be able to drop a few of those and replace them with what I
have in v6.18
	https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git/commit/?h=linux-6.18.y-rt-patches&id=73c8e8d7a75fcc8b9026385e64990f3d5ec8a40d

> 0001-ARM-vfp-Provide-vfp_state_hold-for-VFP-locking.patch
> 0002-ARM-vfp-Use-vfp_state_hold-in-vfp_sync_hwstate.patch
> 0003-ARM-vfp-Use-vfp_state_hold-in-vfp_support_entry.patch
> 0004-ARM-vfp-Move-sending-signals-outside-of-vfp_state_ho.patch
> #  f26bdbe1fa9f ("ARM: 9423/1: vfp: Provide vfp_state_hold() for VFP 
> locking.")
>    #  b54cdbad4a39 ("ARM: 9424/1: vfp: Use vfp_state_hold() in 
> vfp_sync_hwstate().")
> #  27035c23bad5 ("ARM: 9425/1: vfp: Use vfp_state_hold() in 
> vfp_support_entry().")
> #  c0b5195bad63 ("ARM: 9426/1: vfp: Move sending signals outside of 
> vfp_state_hold()ed section.")

And this needs to stay

> ARM__Allow_to_enable_RT.patch
> #  c6e61c06d606 ("ARM: 9463/1: Allow to enable RT")
> 

Sebastian