This is a note to let you know that I've just added the patch titled
x86: fix boot on uniprocessor systems
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-fix-boot-on-uniprocessor-systems.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 825600c0f20e595daaa7a6dd8970f84fa2a2ee57 Mon Sep 17 00:00:00 2001
From: Artem Fetishev <[email protected]>
Date: Fri, 28 Mar 2014 13:33:39 -0700
Subject: x86: fix boot on uniprocessor systems
From: Artem Fetishev <[email protected]>
commit 825600c0f20e595daaa7a6dd8970f84fa2a2ee57 upstream.
On x86 uniprocessor systems topology_physical_package_id() returns -1
which causes rapl_cpu_prepare() to leave rapl_pmu variable uninitialized
which leads to GPF in rapl_pmu_init().
See arch/x86/kernel/cpu/perf_event_intel_rapl.c.
It turns out that physical_package_id and core_id can actually be
retreived for uniprocessor systems too. Enabling them also fixes
rapl_pmu code.
Signed-off-by: Artem Fetishev <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/x86/include/asm/topology.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -157,9 +157,10 @@ static inline void setup_node_to_cpumask
extern const struct cpumask *cpu_coregroup_mask(int cpu);
-#ifdef ENABLE_TOPO_DEFINES
#define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id)
#define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
+
+#ifdef ENABLE_TOPO_DEFINES
#define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
#define topology_thread_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
Patches currently in stable-queue which might be from [email protected]
are
queue-3.4/x86-fix-boot-on-uniprocessor-systems.patch
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