diff options
Diffstat (limited to 'debian/patches-rt/0009-dev-Remove-PREEMPT_RT-ifdefs-from-backlog_lock.patch')
| -rw-r--r-- | debian/patches-rt/0009-dev-Remove-PREEMPT_RT-ifdefs-from-backlog_lock.patch | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/debian/patches-rt/0009-dev-Remove-PREEMPT_RT-ifdefs-from-backlog_lock.patch b/debian/patches-rt/0009-dev-Remove-PREEMPT_RT-ifdefs-from-backlog_lock.patch new file mode 100644 index 0000000000..bc5b67d203 --- /dev/null +++ b/debian/patches-rt/0009-dev-Remove-PREEMPT_RT-ifdefs-from-backlog_lock.patch @@ -0,0 +1,60 @@ +From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Date: Tue, 22 Aug 2023 18:14:44 +0200 +Subject: [PATCH 09/15] dev: Remove PREEMPT_RT ifdefs from backlog_lock.*(). +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.10/older/patches-6.10.2-rt14.tar.xz + +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 + +Since the introduction of backlog NAPI and making it mandatory for +PREEMPT_RT the ifdef within backlog_lock.*() is obsolete and can be +removed.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> +--- + net/core/dev.c | 8 ++++---- + 1 file changed, 4 insertions(+), 4 deletions(-) + +--- a/net/core/dev.c ++++ b/net/core/dev.c +@@ -229,7 +229,7 @@ static inline void backlog_lock_irq_save + { + 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_disa + { + 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_re + { + 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_en + { + 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(); + } + |