[kernel] r18516 - in dists/trunk/linux-2.6/debian: . patches/bugfix/all patches/series
Ben Hutchings
benh at alioth.debian.org
Fri Jan 13 02:51:51 UTC 2012
Author: benh
Date: Fri Jan 13 02:51:49 2012
New Revision: 18516
Log:
[um,m68k] Register a generic CPU device (fixes regression introduced by the fix for #649216)
Added:
dists/trunk/linux-2.6/debian/patches/bugfix/all/cpu-Do-not-return-errors-from-cpu_dev_init-which-wil.patch
dists/trunk/linux-2.6/debian/patches/bugfix/all/cpu-Register-a-generic-CPU-device-on-architectures-t.patch
Modified:
dists/trunk/linux-2.6/debian/changelog
dists/trunk/linux-2.6/debian/patches/series/base
Modified: dists/trunk/linux-2.6/debian/changelog
==============================================================================
--- dists/trunk/linux-2.6/debian/changelog Fri Jan 13 02:21:47 2012 (r18515)
+++ dists/trunk/linux-2.6/debian/changelog Fri Jan 13 02:51:49 2012 (r18516)
@@ -15,6 +15,8 @@
* [ia64] Add accept4() syscall (Closes: #647825)
* [x86] staging: Enable STAGING_MEDIA, which various drivers now depend on
(Closes: #654800)
+ * [um,m68k] Register a generic CPU device (fixes regression introduced by
+ the fix for #649216)
[ Bastian Blank ]
* [amd64] crypt: Enable some amd64 only ciphers.
Added: dists/trunk/linux-2.6/debian/patches/bugfix/all/cpu-Do-not-return-errors-from-cpu_dev_init-which-wil.patch
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ dists/trunk/linux-2.6/debian/patches/bugfix/all/cpu-Do-not-return-errors-from-cpu_dev_init-which-wil.patch Fri Jan 13 02:51:49 2012 (r18516)
@@ -0,0 +1,63 @@
+From: Ben Hutchings <ben at decadent.org.uk>
+Date: Tue, 10 Jan 2012 02:59:49 +0000
+Subject: [PATCH 1/2] cpu: Do not return errors from cpu_dev_init() which will
+ be ignored
+
+commit 024f78462c3da710642a54939888a92e28704653 upstream.
+
+cpu_dev_init() is only called from driver_init(), which does not check
+its return value. Therefore make cpu_dev_init() return void.
+
+We must register the CPU subsystem, so panic if this fails.
+
+If sched_create_sysfs_power_savings_entries() fails, the damage is
+contained, so ignore this (as before).
+
+Signed-off-by: Ben Hutchings <ben at decadent.org.uk>
+Signed-off-by: Linus Torvalds <torvalds at linux-foundation.org>
+[bwh: Backport to 3.2]
+---
+--- a/drivers/base/base.h
++++ b/drivers/base/base.h
+@@ -95,7 +95,7 @@ extern int hypervisor_init(void);
+ #endif
+ extern int platform_bus_init(void);
+ extern int system_bus_init(void);
+-extern int cpu_dev_init(void);
++extern void cpu_dev_init(void);
+
+ extern int bus_add_device(struct device *dev);
+ extern void bus_probe_device(struct device *dev);
+--- a/drivers/base/cpu.c
++++ b/drivers/base/cpu.c
+@@ -2,6 +2,7 @@
+ * drivers/base/cpu.c - basic CPU class support
+ */
+
++#include <linux/kernel.h>
+ #include <linux/sysdev.h>
+ #include <linux/module.h>
+ #include <linux/init.h>
+@@ -247,17 +248,14 @@ bool cpu_is_hotpluggable(unsigned cpu)
+ }
+ EXPORT_SYMBOL_GPL(get_cpu_sysdev);
+
+-int __init cpu_dev_init(void)
++void __init cpu_dev_init(void)
+ {
+- int err;
+-
+- err = sysdev_class_register(&cpu_sysdev_class);
++ if (sysdev_class_register(&cpu_sysdev_class))
++ panic("Failed to register CPU subsystem");
++
+ #if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
+- if (!err)
+- err = sched_create_sysfs_power_savings_entries(&cpu_sysdev_class);
++ sched_create_sysfs_power_savings_entries(&cpu_sysdev_class);
+ #endif
+-
+- return err;
+ }
+
+ static struct sysdev_class_attribute *cpu_sysdev_class_attrs[] = {
Added: dists/trunk/linux-2.6/debian/patches/bugfix/all/cpu-Register-a-generic-CPU-device-on-architectures-t.patch
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ dists/trunk/linux-2.6/debian/patches/bugfix/all/cpu-Register-a-generic-CPU-device-on-architectures-t.patch Fri Jan 13 02:51:49 2012 (r18516)
@@ -0,0 +1,152 @@
+From: Ben Hutchings <ben at decadent.org.uk>
+Date: Tue, 10 Jan 2012 03:04:32 +0000
+Subject: [PATCH 2/2] cpu: Register a generic CPU device on architectures that
+ currently do not
+
+commit 9f13a1fd452f11c18004ba2422a6384b424ec8a9 upstream.
+
+frv, h8300, m68k, microblaze, openrisc, score, um and xtensa currently
+do not register a CPU device. Add the config option GENERIC_CPU_DEVICES
+which causes a generic CPU device to be registered for each present CPU,
+and make all these architectures select it.
+
+Richard Weinberger <richard at nod.at> covered UML and suggested using
+per_cpu.
+
+Signed-off-by: Ben Hutchings <ben at decadent.org.uk>
+Signed-off-by: Linus Torvalds <torvalds at linux-foundation.org>
+[bwh: Backport to 3.2]
+---
+--- a/arch/frv/Kconfig
++++ b/arch/frv/Kconfig
+@@ -8,6 +8,7 @@ config FRV
+ select HAVE_GENERIC_HARDIRQS
+ select GENERIC_IRQ_SHOW
+ select ARCH_HAVE_NMI_SAFE_CMPXCHG
++ select GENERIC_CPU_DEVICES
+
+ config ZONE_DMA
+ bool
+--- a/arch/h8300/Kconfig
++++ b/arch/h8300/Kconfig
+@@ -4,6 +4,7 @@ config H8300
+ select HAVE_IDE
+ select HAVE_GENERIC_HARDIRQS
+ select GENERIC_IRQ_SHOW
++ select GENERIC_CPU_DEVICES
+
+ config SYMBOL_PREFIX
+ string
+--- a/arch/m68k/Kconfig
++++ b/arch/m68k/Kconfig
+@@ -6,6 +6,7 @@ config M68K
+ select HAVE_GENERIC_HARDIRQS
+ select GENERIC_IRQ_SHOW
+ select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS
++ select GENERIC_CPU_DEVICES
+
+ config RWSEM_GENERIC_SPINLOCK
+ bool
+--- a/arch/microblaze/Kconfig
++++ b/arch/microblaze/Kconfig
+@@ -17,6 +17,7 @@ config MICROBLAZE
+ select HAVE_GENERIC_HARDIRQS
+ select GENERIC_IRQ_PROBE
+ select GENERIC_IRQ_SHOW
++ select GENERIC_CPU_DEVICES
+
+ config SWAP
+ def_bool n
+--- a/arch/openrisc/Kconfig
++++ b/arch/openrisc/Kconfig
+@@ -15,6 +15,7 @@ config OPENRISC
+ select GENERIC_IRQ_PROBE
+ select GENERIC_IRQ_SHOW
+ select GENERIC_IOMAP
++ select GENERIC_CPU_DEVICES
+
+ config MMU
+ def_bool y
+--- a/arch/score/Kconfig
++++ b/arch/score/Kconfig
+@@ -4,6 +4,7 @@ config SCORE
+ def_bool y
+ select HAVE_GENERIC_HARDIRQS
+ select GENERIC_IRQ_SHOW
++ select GENERIC_CPU_DEVICES
+
+ choice
+ prompt "System type"
+--- a/arch/um/Kconfig.common
++++ b/arch/um/Kconfig.common
+@@ -8,6 +8,7 @@ config UML
+ default y
+ select HAVE_GENERIC_HARDIRQS
+ select GENERIC_IRQ_SHOW
++ select GENERIC_CPU_DEVICES
+
+ config MMU
+ bool
+--- a/arch/xtensa/Kconfig
++++ b/arch/xtensa/Kconfig
+@@ -9,6 +9,7 @@ config XTENSA
+ select HAVE_IDE
+ select HAVE_GENERIC_HARDIRQS
+ select GENERIC_IRQ_SHOW
++ select GENERIC_CPU_DEVICES
+ help
+ Xtensa processors are 32-bit RISC machines designed by Tensilica
+ primarily for embedded systems. These processors are both
+--- a/drivers/base/Kconfig
++++ b/drivers/base/Kconfig
+@@ -172,6 +172,10 @@ config SYS_HYPERVISOR
+ bool
+ default n
+
++config GENERIC_CPU_DEVICES
++ bool
++ default n
++
+ source "drivers/base/regmap/Kconfig"
+
+ config DMA_SHARED_BUFFER
+--- a/drivers/base/cpu.c
++++ b/drivers/base/cpu.c
+@@ -12,6 +12,7 @@
+ #include <linux/device.h>
+ #include <linux/node.h>
+ #include <linux/gfp.h>
++#include <linux/percpu.h>
+
+ #include "base.h"
+
+@@ -248,11 +249,29 @@ bool cpu_is_hotpluggable(unsigned cpu)
+ }
+ EXPORT_SYMBOL_GPL(get_cpu_sysdev);
+
++#ifdef CONFIG_GENERIC_CPU_DEVICES
++static DEFINE_PER_CPU(struct cpu, cpu_devices);
++#endif
++
++static void __init cpu_dev_register_generic(void)
++{
++#ifdef CONFIG_GENERIC_CPU_DEVICES
++ int i;
++
++ for_each_possible_cpu(i) {
++ if (register_cpu(&per_cpu(cpu_devices, i), i))
++ panic("Failed to register CPU device");
++ }
++#endif
++}
++
+ void __init cpu_dev_init(void)
+ {
+ if (sysdev_class_register(&cpu_sysdev_class))
+ panic("Failed to register CPU subsystem");
+
++ cpu_dev_register_generic();
++
+ #if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
+ sched_create_sysfs_power_savings_entries(&cpu_sysdev_class);
+ #endif
Modified: dists/trunk/linux-2.6/debian/patches/series/base
==============================================================================
--- dists/trunk/linux-2.6/debian/patches/series/base Fri Jan 13 02:21:47 2012 (r18515)
+++ dists/trunk/linux-2.6/debian/patches/series/base Fri Jan 13 02:51:49 2012 (r18516)
@@ -55,6 +55,8 @@
+ bugfix/all/0005-media-staging-lirc_serial-Do-not-assume-error-codes-.patch
+ features/all/topology-Provide-CPU-topology-in-sysfs-in-SMP-configura.patch
++ bugfix/all/cpu-Do-not-return-errors-from-cpu_dev_init-which-wil.patch
++ bugfix/all/cpu-Register-a-generic-CPU-device-on-architectures-t.patch
+ debian/x86-memtest-WARN-if-bad-RAM-found.patch
+ debian/ARM-Remove-use-of-possibly-undefined-BUILD_BUG_ON-in.patch
+ bugfix/arm/ARM-ixp4xx-gpiolib-support.patch
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