diff options
Diffstat (limited to 'target/linux/mvebu/patches-4.4/039-net-mvneta-Use-on_each_cpu-when-possible.patch')
| -rw-r--r-- | target/linux/mvebu/patches-4.4/039-net-mvneta-Use-on_each_cpu-when-possible.patch | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-4.4/039-net-mvneta-Use-on_each_cpu-when-possible.patch b/target/linux/mvebu/patches-4.4/039-net-mvneta-Use-on_each_cpu-when-possible.patch new file mode 100644 index 0000000000..76257a2a71 --- /dev/null +++ b/target/linux/mvebu/patches-4.4/039-net-mvneta-Use-on_each_cpu-when-possible.patch @@ -0,0 +1,68 @@ +From: Gregory CLEMENT <gregory.clement@free-electrons.com> +Date: Thu, 4 Feb 2016 22:09:25 +0100 +Subject: [PATCH] net: mvneta: Use on_each_cpu when possible + +Instead of using a for_each_* loop in which we just call the +smp_call_function_single macro, it is more simple to directly use the +on_each_cpu macro. Moreover, this macro ensures that the calls will be +done all at once. + +Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk> +Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + +--- a/drivers/net/ethernet/marvell/mvneta.c ++++ b/drivers/net/ethernet/marvell/mvneta.c +@@ -2553,7 +2553,7 @@ static void mvneta_percpu_mask_interrupt + + static void mvneta_start_dev(struct mvneta_port *pp) + { +- unsigned int cpu; ++ int cpu; + + mvneta_max_rx_size_set(pp, pp->pkt_size); + mvneta_txq_max_tx_size_set(pp, pp->pkt_size); +@@ -2569,9 +2569,8 @@ static void mvneta_start_dev(struct mvne + } + + /* Unmask interrupts. It has to be done from each CPU */ +- for_each_online_cpu(cpu) +- smp_call_function_single(cpu, mvneta_percpu_unmask_interrupt, +- pp, true); ++ on_each_cpu(mvneta_percpu_unmask_interrupt, pp, true); ++ + mvreg_write(pp, MVNETA_INTR_MISC_MASK, + MVNETA_CAUSE_PHY_STATUS_CHANGE | + MVNETA_CAUSE_LINK_CHANGE | +@@ -2991,7 +2990,7 @@ static int mvneta_percpu_notifier(struct + static int mvneta_open(struct net_device *dev) + { + struct mvneta_port *pp = netdev_priv(dev); +- int ret, cpu; ++ int ret; + + pp->pkt_size = MVNETA_RX_PKT_SIZE(pp->dev->mtu); + pp->frag_size = SKB_DATA_ALIGN(MVNETA_RX_BUF_SIZE(pp->pkt_size)) + +@@ -3024,9 +3023,7 @@ static int mvneta_open(struct net_device + /* Enable per-CPU interrupt on all the CPU to handle our RX + * queue interrupts + */ +- for_each_online_cpu(cpu) +- smp_call_function_single(cpu, mvneta_percpu_enable, +- pp, true); ++ on_each_cpu(mvneta_percpu_enable, pp, true); + + + /* Register a CPU notifier to handle the case where our CPU +@@ -3313,9 +3310,7 @@ static int mvneta_config_rss(struct mvn + + netif_tx_stop_all_queues(pp->dev); + +- for_each_online_cpu(cpu) +- smp_call_function_single(cpu, mvneta_percpu_mask_interrupt, +- pp, true); ++ on_each_cpu(mvneta_percpu_mask_interrupt, pp, true); + + /* We have to synchronise on the napi of each CPU */ + for_each_online_cpu(cpu) { |