[ Sasha's backport helper bot ]
Hi,
Summary of potential issues: ⚠️ Found matching upstream commit but patch is missing proper reference to it
Found matching upstream commit: 94cff94634e506a4a44684bee1875d2dbf782722
Status in newer kernel trees: 6.14.y | Present (different SHA1: 6fdc7368341b) 6.12.y | Present (different SHA1: e0e66bb1af60) 6.6.y | Present (different SHA1: 5dd520b92acb) 6.1.y | Present (different SHA1: d2f5f71707cf) 5.15.y | Present (different SHA1: f29f5341f350)
Note: The patch differs from the upstream commit: --- 1: 94cff94634e50 ! 1: 2a4e575499d58 clocksource/i8253: Use raw_spinlock_irqsave() in clockevent_i8253_disable() @@ Commit message raw_spinlock_irqsave() to cure this.
[ tglx: Massage change log and use guard() ] + [ bigeasy: Dropped guard() for stable ]
Fixes: c8c4076723dac ("x86/timer: Skip PIT initialization on modern chipsets") Signed-off-by: Sebastian Andrzej Siewior bigeasy@linutronix.de Signed-off-by: Thomas Gleixner tglx@linutronix.de Cc: stable@vger.kernel.org Link: https://lore.kernel.org/all/20250404133116.p-XRWJXf@linutronix.de + (cherry picked from commit 94cff94634e506a4a44684bee1875d2dbf782722) + Signed-off-by: Sebastian Andrzej Siewior bigeasy@linutronix.de
## drivers/clocksource/i8253.c ## @@ drivers/clocksource/i8253.c: int __init clocksource_i8253_init(void) @@ drivers/clocksource/i8253.c: int __init clocksource_i8253_init(void) void clockevent_i8253_disable(void) { - raw_spin_lock(&i8253_lock); -+ guard(raw_spinlock_irqsave)(&i8253_lock); ++ unsigned long flags; ++ ++ raw_spin_lock_irqsave(&i8253_lock, flags);
/* * Writing the MODE register should stop the counter, according to @@ drivers/clocksource/i8253.c: void clockevent_i8253_disable(void) - outb_p(0, PIT_CH0);
outb_p(0x30, PIT_MODE); -- + - raw_spin_unlock(&i8253_lock); ++ raw_spin_unlock_irqrestore(&i8253_lock, flags); }
static int pit_shutdown(struct clock_event_device *evt) ---
Results of testing on various branches:
| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-5.10.y | Success | Success |