Re: [PATCH 6.1.y] hrtimers: Force migrate away hrtimers queued after CPUHP_AP_HRTIMERS_DYING

[Sasha Levin <sashal@kernel.org>]

[ Sasha's backport helper bot ]

Hi,

✅ All tests passed successfully. No issues detected.
No action required from the submitter.

The upstream commit SHA1 provided is correct: 53dac345395c0d2493cbc2f4c85fe38aef5b63f5

WARNING: Author mismatch between patch and upstream commit:
Backport author: Zhaoyang Li<lizy04@hust.edu.cn>
Commit author: Frederic Weisbecker<frederic@kernel.org>

Status in newer kernel trees:
6.14.y | Present (exact SHA1)
6.12.y | Present (different SHA1: e456a88bddae)
6.6.y | Not found

Note: The patch differs from the upstream commit:
---
1:  53dac345395c0 ! 1:  d4b970537740a hrtimers: Force migrate away hrtimers queued after CPUHP_AP_HRTIMERS_DYING
    @@ Metadata
      ## Commit message ##
         hrtimers: Force migrate away hrtimers queued after CPUHP_AP_HRTIMERS_DYING
     
    +    [ Upstream commit 53dac345395c0d2493cbc2f4c85fe38aef5b63f5 ]
    +
         hrtimers are migrated away from the dying CPU to any online target at
         the CPUHP_AP_HRTIMERS_DYING stage in order not to delay bandwidth timers
         handling tasks involved in the CPU hotplug forward progress.
    @@ Commit message
         Link: https://lore.kernel.org/all/20250117232433.24027-1-frederic@kernel.org
         Closes: 20241213203739.1519801-1-usamaarif642@gmail.com
     
    - ## include/linux/hrtimer_defs.h ##
    -@@ include/linux/hrtimer_defs.h: struct hrtimer_cpu_base {
    +    Signed-off-by: Zhaoyang Li <lizy04@hust.edu.cn>
    +
    + ## include/linux/hrtimer.h ##
    +@@ include/linux/hrtimer.h: struct hrtimer_cpu_base {
      	ktime_t				softirq_expires_next;
      	struct hrtimer			*softirq_next_timer;
      	struct hrtimer_clock_base	clock_base[HRTIMER_MAX_CLOCK_BASES];
     +	call_single_data_t		csd;
      } ____cacheline_aligned;
      
    - 
    + static inline void hrtimer_set_expires(struct hrtimer *timer, ktime_t time)
     
      ## kernel/time/hrtimer.c ##
     @@
---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-6.1.y        |  Success    |  Success   |