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Date: Sat, 17 Oct 2015 18:08:17 +0200 (CEST)
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
cc: linux-rt-users <linux-rt-users@...r.kernel.org>,
Sebastian Sewior <bigeasy@...utronix.de>,
Steven Rostedt <rostedt@...dmis.org>
Subject: [ANNOUNCE] v4.1.10-rt10
With proper subject line this time!
Dear RT folks!
I'm pleased to announce the v4.1.10-rt10 patch set. v4.1.10-rt9 is a
non-announced update to incorporate the linux-4.1.y stable tree
changes.
Changes since v4.1.10-rt9:
Ben Hutchings (1):
work-simple: Add missing #include <linux/export.h>
Grygorii Strashko (1):
net/core/cpuhotplug: Drain input_pkt_queue lockless
Thomas Gleixner (2):
arm64/xen: Make XEN depend on !RT
v4.1.10-rt10
Yang Shi (2):
arm64: Convert patch_lock to raw lock
arm64: Replace read_lock to rcu lock in call_break_hook
Known issues:
- bcache stays disabled
- CPU hotplug is not better than before
- The netlink_release() OOPS, reported by Clark, is still on the
list, but unsolved due to lack of information
The delta patch against 4.1.10-rt10 is appended below and can be found here:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/incr/patch-4.1.10-rt9-rt10.patch.xz
You can get this release via the git tree at:
git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.1.10-rt10
The RT patch against 4.1.10 can be found here:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/patch-4.1.10-rt10.patch.xz
The split quilt queue is available at:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/patches-4.1.10-rt10.tar.xz
Enjoy!
tglx
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 2cc65a6f4bbd..09a41259b984 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -601,7 +601,7 @@ config XEN_DOM0
config XEN
bool "Xen guest support on ARM64"
- depends on ARM64 && OF
+ depends on ARM64 && OF && !PREEMPT_RT_FULL
select SWIOTLB_XEN
help
Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c
index b056369fd47d..70654d843d9b 100644
--- a/arch/arm64/kernel/debug-monitors.c
+++ b/arch/arm64/kernel/debug-monitors.c
@@ -271,20 +271,21 @@ static int single_step_handler(unsigned long addr, unsigned int esr,
* Use reader/writer locks instead of plain spinlock.
*/
static LIST_HEAD(break_hook);
-static DEFINE_RWLOCK(break_hook_lock);
+static DEFINE_SPINLOCK(break_hook_lock);
void register_break_hook(struct break_hook *hook)
{
- write_lock(&break_hook_lock);
- list_add(&hook->node, &break_hook);
- write_unlock(&break_hook_lock);
+ spin_lock(&break_hook_lock);
+ list_add_rcu(&hook->node, &break_hook);
+ spin_unlock(&break_hook_lock);
}
void unregister_break_hook(struct break_hook *hook)
{
- write_lock(&break_hook_lock);
- list_del(&hook->node);
- write_unlock(&break_hook_lock);
+ spin_lock(&break_hook_lock);
+ list_del_rcu(&hook->node);
+ spin_unlock(&break_hook_lock);
+ synchronize_rcu();
}
static int call_break_hook(struct pt_regs *regs, unsigned int esr)
@@ -292,11 +293,11 @@ static int call_break_hook(struct pt_regs *regs, unsigned int esr)
struct break_hook *hook;
int (*fn)(struct pt_regs *regs, unsigned int esr) = NULL;
- read_lock(&break_hook_lock);
- list_for_each_entry(hook, &break_hook, node)
+ rcu_read_lock();
+ list_for_each_entry_rcu(hook, &break_hook, node)
if ((esr & hook->esr_mask) == hook->esr_val)
fn = hook->fn;
- read_unlock(&break_hook_lock);
+ rcu_read_unlock();
return fn ? fn(regs, esr) : DBG_HOOK_ERROR;
}
diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c
index 924902083e47..30eb88e5b896 100644
--- a/arch/arm64/kernel/insn.c
+++ b/arch/arm64/kernel/insn.c
@@ -77,7 +77,7 @@ bool __kprobes aarch64_insn_is_nop(u32 insn)
}
}
-static DEFINE_SPINLOCK(patch_lock);
+static DEFINE_RAW_SPINLOCK(patch_lock);
static void __kprobes *patch_map(void *addr, int fixmap)
{
@@ -124,13 +124,13 @@ static int __kprobes __aarch64_insn_write(void *addr, u32 insn)
unsigned long flags = 0;
int ret;
- spin_lock_irqsave(&patch_lock, flags);
+ raw_spin_lock_irqsave(&patch_lock, flags);
waddr = patch_map(addr, FIX_TEXT_POKE0);
ret = probe_kernel_write(waddr, &insn, AARCH64_INSN_SIZE);
patch_unmap(FIX_TEXT_POKE0);
- spin_unlock_irqrestore(&patch_lock, flags);
+ raw_spin_unlock_irqrestore(&patch_lock, flags);
return ret;
}
diff --git a/kernel/sched/work-simple.c b/kernel/sched/work-simple.c
index c996f755dba6..e57a0522573f 100644
--- a/kernel/sched/work-simple.c
+++ b/kernel/sched/work-simple.c
@@ -10,6 +10,7 @@
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
+#include <linux/export.h>
#define SWORK_EVENT_PENDING (1 << 0)
diff --git a/localversion-rt b/localversion-rt
index 22746d6390a4..d79dde624aaa 100644
--- a/localversion-rt
+++ b/localversion-rt
@@ -1 +1 @@
--rt9
+-rt10
diff --git a/net/core/dev.c b/net/core/dev.c
index 4969c0d3dd67..f8c23dee5ae9 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -7217,7 +7217,7 @@ static int dev_cpu_callback(struct notifier_block *nfb,
netif_rx_ni(skb);
input_queue_head_incr(oldsd);
}
- while ((skb = skb_dequeue(&oldsd->input_pkt_queue))) {
+ while ((skb = __skb_dequeue(&oldsd->input_pkt_queue))) {
netif_rx_ni(skb);
input_queue_head_incr(oldsd);
}
--
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