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dev: Remove PREEMPT_RT ifdefs from backlog_lock.*().
The backlog_napi locking (previously RPS) relies on explicit locking if either RPS or backlog NAPI is enabled. If both are disabled then locking was achieved by disabling interrupts except on PREEMPT_RT. PREEMPT_RT was excluded because the needed synchronisation was already provided local_bh_disable(). Since the introduction of backlog NAPI and making it mandatory for PREEMPT_RT the ifdef within backlog_lock.*() is obsolete and can be removed. Remove the ifdefs in backlog_lock.*(). Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Link: https://patch.msgid.link/20240620132727.660738-10-bigeasy@linutronix.de Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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@ -229,7 +229,7 @@ static inline void backlog_lock_irq_save(struct softnet_data *sd,
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{
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if (IS_ENABLED(CONFIG_RPS) || use_backlog_threads())
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spin_lock_irqsave(&sd->input_pkt_queue.lock, *flags);
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else if (!IS_ENABLED(CONFIG_PREEMPT_RT))
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else
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local_irq_save(*flags);
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}
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@ -237,7 +237,7 @@ static inline void backlog_lock_irq_disable(struct softnet_data *sd)
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{
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if (IS_ENABLED(CONFIG_RPS) || use_backlog_threads())
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spin_lock_irq(&sd->input_pkt_queue.lock);
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else if (!IS_ENABLED(CONFIG_PREEMPT_RT))
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else
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local_irq_disable();
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}
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@ -246,7 +246,7 @@ static inline void backlog_unlock_irq_restore(struct softnet_data *sd,
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{
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if (IS_ENABLED(CONFIG_RPS) || use_backlog_threads())
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spin_unlock_irqrestore(&sd->input_pkt_queue.lock, *flags);
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else if (!IS_ENABLED(CONFIG_PREEMPT_RT))
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else
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local_irq_restore(*flags);
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}
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@ -254,7 +254,7 @@ static inline void backlog_unlock_irq_enable(struct softnet_data *sd)
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{
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if (IS_ENABLED(CONFIG_RPS) || use_backlog_threads())
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spin_unlock_irq(&sd->input_pkt_queue.lock);
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else if (!IS_ENABLED(CONFIG_PREEMPT_RT))
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else
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local_irq_enable();
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}
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