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PREEMPT_RT the ifdef within backlog_lock.*() is obsolete and can be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 <[email protected]>
---
net/core/dev.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/net/core/dev.c b/net/core/dev.c
index e62698c7a0e63..db6b6fc997e6d 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -229,7 +229,7 @@ static inline void backlog_lock_irq_save(struct softnet_data *sd,
{
if (IS_ENABLED(CONFIG_RPS) || use_backlog_threads())
spin_lock_irqsave(&sd->input_pkt_queue.lock, *flags);
- else if (!IS_ENABLED(CONFIG_PREEMPT_RT))
+ else
local_irq_save(*flags);
}
@@ -237,7 +237,7 @@ static inline void backlog_lock_irq_disable(struct softnet_data *sd)
{
if (IS_ENABLED(CONFIG_RPS) || use_backlog_threads())
spin_lock_irq(&sd->input_pkt_queue.lock);
- else if (!IS_ENABLED(CONFIG_PREEMPT_RT))
+ else
local_irq_disable();
}
@@ -246,7 +246,7 @@ static inline void backlog_unlock_irq_restore(struct softnet_data *sd,
{
if (IS_ENABLED(CONFIG_RPS) || use_backlog_threads())
spin_unlock_irqrestore(&sd->input_pkt_queue.lock, *flags);
- else if (!IS_ENABLED(CONFIG_PREEMPT_RT))
+ else
local_irq_restore(*flags);
}
@@ -254,7 +254,7 @@ static inline void backlog_unlock_irq_enable(struct softnet_data *sd)
{
if (IS_ENABLED(CONFIG_RPS) || use_backlog_threads())
spin_unlock_irq(&sd->input_pkt_queue.lock);
- else if (!IS_ENABLED(CONFIG_PREEMPT_RT))
+ else
local_irq_enable();
}
--
2.45.1