diff options
| author | Sebastian Andrzej Siewior <[email protected]> | 2025-02-12 10:36:18 +0000 |
|---|---|---|
| committer | Peter Zijlstra <[email protected]> | 2025-03-14 20:13:20 +0000 |
| commit | 87886b32d669abc11c7be95ef44099215e4f5788 (patch) | |
| tree | e12e120fe20ac5184899f28ef716d15cde3520ff /net/unix/af_unix.c | |
| parent | rust: lockdep: Use Pin for all LockClassKey usages (diff) | |
| download | kernel-87886b32d669abc11c7be95ef44099215e4f5788.tar.gz kernel-87886b32d669abc11c7be95ef44099215e4f5788.zip | |
lockdep: Don't disable interrupts on RT in disable_irq_nosync_lockdep.*()
disable_irq_nosync_lockdep() disables interrupts with lockdep enabled to
avoid false positive reports by lockdep that a certain lock has not been
acquired with disabled interrupts. The user of this macros expects that
a lock can be acquried without disabling interrupts because the IRQ line
triggering the interrupt is disabled.
This triggers a warning on PREEMPT_RT because after
disable_irq_nosync_lockdep.*() the following spinlock_t now is acquired
with disabled interrupts.
On PREEMPT_RT there is no difference between spin_lock() and
spin_lock_irq() so avoiding disabling interrupts in this case works for
the two remaining callers as of today.
Don't disable interrupts on PREEMPT_RT in disable_irq_nosync_lockdep.*().
Closes: https://lore.kernel.org/[email protected]
Fixes: e8106b941ceab ("[PATCH] lockdep: core, add enable/disable_irq_irqsave/irqrestore() APIs")
Reported-by: Guenter Roeck <[email protected]>
Suggested-by: "Steven Rostedt (Google)" <[email protected]>
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Tested-by: Guenter Roeck <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions