69 lines
2.3 KiB
Diff
69 lines
2.3 KiB
Diff
From ab8ccfd2553bcf89215561a581249d591822442d Mon Sep 17 00:00:00 2001
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Message-Id: <ab8ccfd2553bcf89215561a581249d591822442d.1601675152.git.zanussi@kernel.org>
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In-Reply-To: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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References: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Wed, 26 Sep 2012 16:21:08 +0200
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Subject: [PATCH 232/333] net: Another local_irq_disable/kmalloc headache
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.148-rt64.tar.xz
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Replace it by a local lock. Though that's pretty inefficient :(
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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net/core/skbuff.c | 10 ++++++----
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1 file changed, 6 insertions(+), 4 deletions(-)
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diff --git a/net/core/skbuff.c b/net/core/skbuff.c
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index be4bc833c28a..6cd78c85a1ea 100644
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--- a/net/core/skbuff.c
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+++ b/net/core/skbuff.c
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@@ -63,6 +63,7 @@
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#include <linux/errqueue.h>
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#include <linux/prefetch.h>
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#include <linux/if_vlan.h>
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+#include <linux/locallock.h>
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#include <net/protocol.h>
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#include <net/dst.h>
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@@ -330,6 +331,7 @@ struct napi_alloc_cache {
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static DEFINE_PER_CPU(struct page_frag_cache, netdev_alloc_cache);
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static DEFINE_PER_CPU(struct napi_alloc_cache, napi_alloc_cache);
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+static DEFINE_LOCAL_IRQ_LOCK(netdev_alloc_lock);
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static void *__netdev_alloc_frag(unsigned int fragsz, gfp_t gfp_mask)
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{
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@@ -337,10 +339,10 @@ static void *__netdev_alloc_frag(unsigned int fragsz, gfp_t gfp_mask)
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unsigned long flags;
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void *data;
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- local_irq_save(flags);
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+ local_lock_irqsave(netdev_alloc_lock, flags);
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nc = this_cpu_ptr(&netdev_alloc_cache);
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data = page_frag_alloc(nc, fragsz, gfp_mask);
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- local_irq_restore(flags);
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+ local_unlock_irqrestore(netdev_alloc_lock, flags);
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return data;
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}
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@@ -412,13 +414,13 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, unsigned int len,
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if (sk_memalloc_socks())
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gfp_mask |= __GFP_MEMALLOC;
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- local_irq_save(flags);
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+ local_lock_irqsave(netdev_alloc_lock, flags);
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nc = this_cpu_ptr(&netdev_alloc_cache);
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data = page_frag_alloc(nc, len, gfp_mask);
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pfmemalloc = nc->pfmemalloc;
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- local_irq_restore(flags);
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+ local_unlock_irqrestore(netdev_alloc_lock, flags);
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if (unlikely(!data))
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return NULL;
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--
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2.17.1
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