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alpha: make irqflags helpers operate on IPL state

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Alpha interrupt masking is controlled by the PAL IPL value, not by the
full processor status word.  Make arch_local_save_flags() return the
current IPL directly, and make arch_local_irq_restore() and
arch_irqs_disabled_flags() treat their argument as IPL state.

Mask the low IPL bits in the restore and test helpers so callers which
still pass a saved PS value continue to behave as expected.

This prepares the irqflags helpers for lockdep IRQ-state tracking, where
the saved flags value is used to determine whether hard IRQs are enabled
or disabled.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Tested-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260706170019.2941459-4-linmag7@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
This commit is contained in:
Magnus Lindholm 2026-07-06 18:56:44 +02:00
parent 46651c650f
commit 05dc12d664
1 changed files with 3 additions and 3 deletions
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6
arch/alpha/include/asm/irqflags.h
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@ -26,7 +26,7 @@ extern int __min_ipl;
static inline unsigned long arch_local_save_flags(void)
{
return rdps();
return getipl();
}
static inline void arch_local_irq_disable(void)
@ -51,13 +51,13 @@ static inline void arch_local_irq_enable(void)
static inline void arch_local_irq_restore(unsigned long flags)
{
barrier();
setipl(flags);
setipl(flags & 7);
barrier();
}
static inline bool arch_irqs_disabled_flags(unsigned long flags)
{
return flags == IPL_MAX;
return (flags & 7) == IPL_MAX;
}
static inline bool arch_irqs_disabled(void)