Re: WARN Kernel v6.9-evl-rebase - do_int80_emulation

[Philippe Gerum <rpm@xenomai.org>]

"Nechita, Ionut" <ionut.nechita@intel.com> writes:

> Hi Philippe,
>
> You are reproduce this issue without CONFIG_EVL and CONFIG_DOVETAIL enabled in config kernel?
>
> CONFIG_EVL=n
> CONFIG_DOVETAIL=n

Yep, this should fix the issue. This bug might have been there since the
introduction of scoped guards for hard spinlocks. Checking and
backporting fixes if so.

commit b51c3afd66c8763bed7a4b8258cc5cf5c8ebd719 (HEAD -> rebase/v6.9-evl)
Author: Philippe Gerum <rpm@xenomai.org>
Date:   Wed May 22 15:16:52 2024 +0200

    irq_pipeline: provide placeholder for scoped guard w/o IRQ_PIPELINE
    
    Signed-off-by: Philippe Gerum <rpm@xenomai.org>

diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index eb8b4d386e942..545368b045e52 100644
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -612,7 +612,24 @@ DEFINE_LOCK_GUARD_1(hard_spinlock_irqsave, hard_spinlock_t,
 		    hard_spin_unlock_irqrestore((raw_spinlock_t *)_T->lock,
 						_T->flags),
 		    unsigned long flags)
-#endif
+#else  /* !CONFIG_IRQ_PIPELINE */
+DEFINE_LOCK_GUARD_1(hard_spinlock, raw_spinlock_t,
+		    raw_spin_lock(_T->lock),
+		    raw_spin_unlock(_T->lock))
+
+DEFINE_LOCK_GUARD_1(hard_spinlock_nested, raw_spinlock_t,
+		    raw_spin_lock_nested(_T->lock, SINGLE_DEPTH_NESTING),
+		    raw_spin_unlock(_T->lock))
+
+DEFINE_LOCK_GUARD_1(hard_spinlock_irq, raw_spinlock_t,
+		    raw_spin_lock_irq(_T->lock),
+		    raw_spin_unlock_irq(_T->lock))
+
+DEFINE_LOCK_GUARD_1(hard_spinlock_irqsave, raw_spinlock_t,
+		    raw_spin_lock_irqsave(_T->lock, _T->flags),
+		    raw_spin_unlock_irqrestore(_T->lock, _T->flags),
+		    unsigned long flags)
+#endif  /* !CONFIG_IRQ_PIPELINE */
 
 DEFINE_LOCK_GUARD_1(spinlock, spinlock_t,
 		    spin_lock(_T->lock),

-- 
Philippe.