Merge tag 'driver-core-3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

fc76a258 · Linus Torvalds <[email protected]> · 2013-07-02 11:44:19 -07:00

Pull driver core updates from Greg KH:
 "Here's the big driver core merge for 3.11-rc1

  Lots of little things, and larger firmware subsystem updates, all
  described in the shortlog.  Nice thing here is that we finally get rid
  of CONFIG_HOTPLUG, after 10+ years, thanks to Stephen Rohtwell (it had
  been always on for a number of kernel releases, now it's just
  removed)"

* tag 'driver-core-3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (27 commits)
  driver core: device.h: fix doc compilation warnings
  firmware loader: fix another compile warning with PM_SLEEP unset
  build some drivers only when compile-testing
  firmware loader: fix compile warning with PM_SLEEP set
  kobject: sanitize argument for format string
  sysfs_notify is only possible on file attributes
  firmware loader: simplify holding module for request_firmware
  firmware loader: don't export cache_firmware and uncache_firmware
  drivers/base: Use attribute groups to create sysfs memory files
  firmware loader: fix compile warning
  firmware loader: fix build failure with !CONFIG_FW_LOADER_USER_HELPER
  Documentation: Updated broken link in HOWTO
  Finally eradicate CONFIG_HOTPLUG
  driver core: firmware loader: kill FW_ACTION_NOHOTPLUG requests before suspend
  driver core: firmware loader: don't cache FW_ACTION_NOHOTPLUG firmware
  Documentation: Tidy up some drivers/base/core.c kerneldoc content.
  platform_device: use a macro instead of platform_driver_register
  firmware: move EXPORT_SYMBOL annotations
  firmware: Avoid deadlock of usermodehelper lock at shutdown
  dell_rbu: Select CONFIG_FW_LOADER_USER_HELPER explicitly
  ...

Commit: fc76a258d41eea7953bb763397c3d1e589d3bb98
Parents: fe3c22bd · bfd63cd2

Merge commit. Changes below are compared with the first parent: fe3c22bd.

Changes

53 files changed · +316 −265

File	Status	Add	Del	Content
Documentation/ABI/testing/sysfs-bus-pci	modified	+1	−4	View file
Documentation/HOWTO	modified	+1	−1	View file
Documentation/SubmitChecklist	modified	+1	−1	View file
Documentation/cpu-hotplug.txt	modified	+1	−1	View file
Documentation/hwmon/submitting-patches	modified	+1	−2	View file
Documentation/kbuild/kconfig.txt	modified	+1	−1	View file
Documentation/usb/hotplug.txt	modified	+3	−3	View file
arch/arm/Kconfig	modified	+1	−1	View file
arch/arm/kernel/module.c	modified	+0	−8	View file
arch/arm/kernel/vmlinux.lds.S	modified	+0	−4	View file
arch/arm/mach-ixp4xx/Kconfig	modified	+0	−1	View file
arch/blackfin/Kconfig	modified	+1	−1	View file
arch/cris/arch-v32/drivers/Kconfig	modified	+0	−1	View file
arch/ia64/Kconfig	modified	+0	−1	View file
arch/mips/Kconfig	modified	+1	−1	View file
arch/parisc/Kconfig	modified	+0	−1	View file
arch/powerpc/Kconfig	modified	+1	−1	View file
arch/powerpc/mm/tlb_hash64.c	modified	+2	−2	View file
arch/s390/Kconfig	modified	+0	−1	View file
arch/sh/Kconfig	modified	+1	−1	View file
arch/sparc/Kconfig	modified	+0	−1	View file
arch/x86/Kconfig	modified	+1	−1	View file
drivers/base/Kconfig	modified	+0	−2	View file
drivers/base/core.c	modified	+9	−7	View file
drivers/base/cpu.c	modified	+39	−20	View file
drivers/base/firmware_class.c	modified	+97	−35	View file
drivers/base/memory.c	modified	+62	−81	View file
drivers/base/platform.c	modified	+5	−3	View file
drivers/char/pcmcia/Kconfig	modified	+1	−1	View file
drivers/edac/Kconfig	modified	+1	−1	View file
drivers/firmware/Kconfig	modified	+1	−0	View file
drivers/misc/Kconfig	modified	+1	−1	View file
drivers/pci/Kconfig	modified	+0	−2	View file
drivers/pci/hotplug/Kconfig	modified	+1	−1	View file
drivers/pcmcia/Kconfig	modified	+0	−1	View file
drivers/ptp/Kconfig	modified	+1	−0	View file
drivers/staging/media/go7007/go7007.txt	modified	+0	−1	View file
drivers/video/geode/Kconfig	modified	+1	−1	View file
fs/debugfs/file.c	modified	+43	−0	View file
fs/gfs2/Kconfig	modified	+2	−3	View file
fs/sysfs/dir.c	modified	+1	−1	View file
fs/sysfs/file.c	modified	+6	−4	View file
fs/sysfs/inode.c	modified	+0	−2	View file
include/asm-generic/vmlinux.lds.h	modified	+0	−20	View file
include/linux/debugfs.h	modified	+2	−0	View file
include/linux/device.h	modified	+3	−0	View file
include/linux/firmware.h	modified	+0	−11	View file
include/linux/platform_device.h	modified	+7	−1	View file
init/Kconfig	modified	+14	−3	View file
kernel/power/Kconfig	modified	+0	−1	View file
lib/fault-inject.c	modified	+0	−21	View file
lib/kobject.c	modified	+1	−1	View file
mm/Kconfig	modified	+1	−1	View file

Only the first 600 diff lines are shown. Download the complete patch.

Documentation/ABI/testing/sysfs-bus-pci

View file

diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci
index 1ce5ae3..5210a51 100644
--- a/Documentation/ABI/testing/sysfs-bus-pci
+++ b/Documentation/ABI/testing/sysfs-bus-pci
@@ -64,7 +64,6 @@ Description:
 		Writing a non-zero value to this attribute will
 		force a rescan of all PCI buses in the system, and
 		re-discover previously removed devices.
-		Depends on CONFIG_HOTPLUG.
 
 What:		/sys/bus/pci/devices/.../msi_irqs/
 Date:		September, 2011
@@ -90,7 +89,6 @@ Contact:	Linux PCI developers <[email protected]>
 Description:
 		Writing a non-zero value to this attribute will
 		hot-remove the PCI device and any of its children.
-		Depends on CONFIG_HOTPLUG.
 
 What:		/sys/bus/pci/devices/.../pci_bus/.../rescan
 Date:		May 2011
@@ -99,7 +97,7 @@ Description:
 		Writing a non-zero value to this attribute will
 		force a rescan of the bus and all child buses,
 		and re-discover devices removed earlier from this
-		part of the device tree.  Depends on CONFIG_HOTPLUG.
+		part of the device tree.
 
 What:		/sys/bus/pci/devices/.../rescan
 Date:		January 2009
@@ -109,7 +107,6 @@ Description:
 		force a rescan of the device's parent bus and all
 		child buses, and re-discover devices removed earlier
 		from this part of the device tree.
-		Depends on CONFIG_HOTPLUG.
 
 What:		/sys/bus/pci/devices/.../reset
 Date:		July 2009

Documentation/HOWTO

View file

diff --git a/Documentation/HOWTO b/Documentation/HOWTO
index a9f288f..27faae3 100644
--- a/Documentation/HOWTO
+++ b/Documentation/HOWTO
@@ -112,7 +112,7 @@ required reading:
 
     Other excellent descriptions of how to create patches properly are:
 	"The Perfect Patch"
-		http://userweb.kernel.org/~akpm/stuff/tpp.txt
+		http://kerneltrap.org/node/3737
 	"Linux kernel patch submission format"
 		http://linux.yyz.us/patch-format.html
 

Documentation/SubmitChecklist

View file

diff --git a/Documentation/SubmitChecklist b/Documentation/SubmitChecklist
index dc0e332..2b7e32d 100644
--- a/Documentation/SubmitChecklist
+++ b/Documentation/SubmitChecklist
@@ -105,5 +105,5 @@ kernel patches.
     same time, just various/random combinations of them]:
 
     CONFIG_SMP, CONFIG_SYSFS, CONFIG_PROC_FS, CONFIG_INPUT, CONFIG_PCI,
-    CONFIG_BLOCK, CONFIG_PM, CONFIG_HOTPLUG, CONFIG_MAGIC_SYSRQ,
+    CONFIG_BLOCK, CONFIG_PM, CONFIG_MAGIC_SYSRQ,
     CONFIG_NET, CONFIG_INET=n (but latter with CONFIG_NET=y)

Documentation/cpu-hotplug.txt

View file

diff --git a/Documentation/cpu-hotplug.txt b/Documentation/cpu-hotplug.txt
index 9f40135..0efd1b9 100644
--- a/Documentation/cpu-hotplug.txt
+++ b/Documentation/cpu-hotplug.txt
@@ -128,7 +128,7 @@ A: When doing make defconfig, Enable CPU hotplug support
 
    "Processor type and Features" -> Support for Hotpluggable CPUs
 
-Make sure that you have CONFIG_HOTPLUG, and CONFIG_SMP turned on as well.
+Make sure that you have CONFIG_SMP turned on as well.
 
 You would need to enable CONFIG_HOTPLUG_CPU for SMP suspend/resume support
 as well.

Documentation/hwmon/submitting-patches

View file

diff --git a/Documentation/hwmon/submitting-patches b/Documentation/hwmon/submitting-patches
index 843751c..4628646 100644
--- a/Documentation/hwmon/submitting-patches
+++ b/Documentation/hwmon/submitting-patches
@@ -27,8 +27,7 @@ increase the chances of your change being accepted.
   explicitly below the patch header.
 
 * If your patch (or the driver) is affected by configuration options such as
-  CONFIG_SMP or CONFIG_HOTPLUG, make sure it compiles for all configuration
-  variants.
+  CONFIG_SMP, make sure it compiles for all configuration variants.
 
 
 2. Adding functionality to existing drivers

Documentation/kbuild/kconfig.txt

View file

diff --git a/Documentation/kbuild/kconfig.txt b/Documentation/kbuild/kconfig.txt
index 3f429ed..213859e 100644
--- a/Documentation/kbuild/kconfig.txt
+++ b/Documentation/kbuild/kconfig.txt
@@ -165,7 +165,7 @@ Searching in menuconfig:
 	Example:
 		/hotplug
 		This lists all config symbols that contain "hotplug",
-		e.g., HOTPLUG, HOTPLUG_CPU, MEMORY_HOTPLUG.
+		e.g., HOTPLUG_CPU, MEMORY_HOTPLUG.
 
 	For search help, enter / followed TAB-TAB-TAB (to highlight
 	<Help>) and Enter.  This will tell you that you can also use

Documentation/usb/hotplug.txt

View file

diff --git a/Documentation/usb/hotplug.txt b/Documentation/usb/hotplug.txt
index 4c94571..6424b13 100644
--- a/Documentation/usb/hotplug.txt
+++ b/Documentation/usb/hotplug.txt
@@ -33,9 +33,9 @@ you get the best hotplugging when you configure a highly modular system.
 
 KERNEL HOTPLUG HELPER (/sbin/hotplug)
 
-When you compile with CONFIG_HOTPLUG, you get a new kernel parameter:
-/proc/sys/kernel/hotplug, which normally holds the pathname "/sbin/hotplug".
-That parameter names a program which the kernel may invoke at various times.
+There is a kernel parameter: /proc/sys/kernel/hotplug, which normally
+holds the pathname "/sbin/hotplug".  That parameter names a program
+which the kernel may invoke at various times.
 
 The /sbin/hotplug program can be invoked by any subsystem as part of its
 reaction to a configuration change, from a thread in that subsystem.

arch/arm/Kconfig

View file

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 136f263..b519015 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1552,7 +1552,7 @@ config NR_CPUS
 
 config HOTPLUG_CPU
 	bool "Support for hot-pluggable CPUs"
-	depends on SMP && HOTPLUG
+	depends on SMP
 	help
 	  Say Y here to experiment with turning CPUs off and on.  CPUs
 	  can be controlled through /sys/devices/system/cpu.

arch/arm/kernel/module.c

View file

diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
index 1e9be5d..85c3fb6 100644
--- a/arch/arm/kernel/module.c
+++ b/arch/arm/kernel/module.c
@@ -288,24 +288,16 @@ int module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
 
 		if (strcmp(".ARM.exidx.init.text", secname) == 0)
 			maps[ARM_SEC_INIT].unw_sec = s;
-		else if (strcmp(".ARM.exidx.devinit.text", secname) == 0)
-			maps[ARM_SEC_DEVINIT].unw_sec = s;
 		else if (strcmp(".ARM.exidx", secname) == 0)
 			maps[ARM_SEC_CORE].unw_sec = s;
 		else if (strcmp(".ARM.exidx.exit.text", secname) == 0)
 			maps[ARM_SEC_EXIT].unw_sec = s;
-		else if (strcmp(".ARM.exidx.devexit.text", secname) == 0)
-			maps[ARM_SEC_DEVEXIT].unw_sec = s;
 		else if (strcmp(".init.text", secname) == 0)
 			maps[ARM_SEC_INIT].txt_sec = s;
-		else if (strcmp(".devinit.text", secname) == 0)
-			maps[ARM_SEC_DEVINIT].txt_sec = s;
 		else if (strcmp(".text", secname) == 0)
 			maps[ARM_SEC_CORE].txt_sec = s;
 		else if (strcmp(".exit.text", secname) == 0)
 			maps[ARM_SEC_EXIT].txt_sec = s;
-		else if (strcmp(".devexit.text", secname) == 0)
-			maps[ARM_SEC_DEVEXIT].txt_sec = s;
 	}
 
 	for (i = 0; i < ARM_SEC_MAX; i++)

arch/arm/kernel/vmlinux.lds.S

View file

diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index a871b8e..fa25e4e 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -70,10 +70,6 @@ SECTIONS
 		ARM_EXIT_DISCARD(EXIT_TEXT)
 		ARM_EXIT_DISCARD(EXIT_DATA)
 		EXIT_CALL
-#ifndef CONFIG_HOTPLUG
-		*(.ARM.exidx.devexit.text)
-		*(.ARM.extab.devexit.text)
-#endif
 #ifndef CONFIG_MMU
 		*(.fixup)
 		*(__ex_table)

arch/arm/mach-ixp4xx/Kconfig

View file

diff --git a/arch/arm/mach-ixp4xx/Kconfig b/arch/arm/mach-ixp4xx/Kconfig
index 73a2d90..30e1ebe 100644
--- a/arch/arm/mach-ixp4xx/Kconfig
+++ b/arch/arm/mach-ixp4xx/Kconfig
@@ -235,7 +235,6 @@ config IXP4XX_QMGR
 config IXP4XX_NPE
 	tristate "IXP4xx Network Processor Engine support"
 	select FW_LOADER
-	select HOTPLUG
 	help
 	  This driver supports IXP4xx built-in network coprocessors
 	  and is automatically selected by Ethernet and HSS drivers.

arch/blackfin/Kconfig

View file

diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index a117652..b573827 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -253,7 +253,7 @@ config NR_CPUS
 
 config HOTPLUG_CPU
 	bool "Support for hot-pluggable CPUs"
-	depends on SMP && HOTPLUG
+	depends on SMP
 	default y
 
 config BF_REV_MIN

arch/cris/arch-v32/drivers/Kconfig

View file

diff --git a/arch/cris/arch-v32/drivers/Kconfig b/arch/cris/arch-v32/drivers/Kconfig
index c55971a..ab725ed 100644
--- a/arch/cris/arch-v32/drivers/Kconfig
+++ b/arch/cris/arch-v32/drivers/Kconfig
@@ -617,7 +617,6 @@ config ETRAX_PV_CHANGEABLE_BITS
 config ETRAX_CARDBUS
         bool "Cardbus support"
         depends on ETRAX_ARCH_V32
-        select HOTPLUG
         help
 	 Enabled the ETRAX Cardbus driver.
 

arch/ia64/Kconfig

View file

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 1a2b774..5a768ad 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -376,7 +376,6 @@ config NR_CPUS
 config HOTPLUG_CPU
 	bool "Support for hot-pluggable CPUs"
 	depends on SMP
-	select HOTPLUG
 	default n
 	---help---
 	  Say Y here to experiment with turning CPUs off and on.  CPUs

arch/mips/Kconfig

View file

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 7a58ab9..e433b90 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -962,7 +962,7 @@ config SYS_HAS_EARLY_PRINTK
 
 config HOTPLUG_CPU
 	bool "Support for hot-pluggable CPUs"
-	depends on SMP && HOTPLUG && SYS_SUPPORTS_HOTPLUG_CPU
+	depends on SMP && SYS_SUPPORTS_HOTPLUG_CPU
 	help
 	  Say Y here to allow turning CPUs off and on. CPUs can be
 	  controlled through /sys/devices/system/cpu.

arch/parisc/Kconfig

View file

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 6507dab..2a2aea5 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -254,7 +254,6 @@ config IRQSTACKS
 config HOTPLUG_CPU
 	bool
 	default y if SMP
-	select HOTPLUG
 
 config ARCH_SELECT_MEMORY_MODEL
 	def_bool y

arch/powerpc/Kconfig

View file

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index c33e3ad..508e3fe 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -341,7 +341,7 @@ config SWIOTLB
 
 config HOTPLUG_CPU
 	bool "Support for enabling/disabling CPUs"
-	depends on SMP && HOTPLUG && (PPC_PSERIES || \
+	depends on SMP && (PPC_PSERIES || \
 	PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
 	---help---
 	  Say Y here to be able to disable and re-enable individual

arch/powerpc/mm/tlb_hash64.c

View file

diff --git a/arch/powerpc/mm/tlb_hash64.c b/arch/powerpc/mm/tlb_hash64.c
index 023ec8a..7df1c5e 100644
--- a/arch/powerpc/mm/tlb_hash64.c
+++ b/arch/powerpc/mm/tlb_hash64.c
@@ -183,8 +183,8 @@ void tlb_flush(struct mmu_gather *tlb)
  * since 64K pages may overlap with other bridges when using 64K pages
  * with 4K HW pages on IO space.
  *
- * Because of that usage pattern, it's only available with CONFIG_HOTPLUG
- * and is implemented for small size rather than speed.
+ * Because of that usage pattern, it is implemented for small size rather
+ * than speed.
  */
 void __flush_hash_table_range(struct mm_struct *mm, unsigned long start,
 			      unsigned long end)

arch/s390/Kconfig

View file

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index da183c5..22f75b5 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -301,7 +301,6 @@ config HOTPLUG_CPU
 	def_bool y
 	prompt "Support for hot-pluggable CPUs"
 	depends on SMP
-	select HOTPLUG
 	help
 	  Say Y here to be able to turn CPUs off and on. CPUs
 	  can be controlled through /sys/devices/system/cpu/cpu#.

arch/sh/Kconfig

View file

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 8c868cf..1020dd8 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -748,7 +748,7 @@ config NR_CPUS
 
 config HOTPLUG_CPU
 	bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
-	depends on SMP && HOTPLUG
+	depends on SMP
 	help
 	  Say Y here to experiment with turning CPUs off and on.  CPUs
 	  can be controlled through /sys/devices/system/cpu.

arch/sparc/Kconfig

View file

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 9ac9f16..a00cbd3 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -243,7 +243,6 @@ config SECCOMP
 config HOTPLUG_CPU
 	bool "Support for hot-pluggable CPUs"
 	depends on SPARC64 && SMP
-	select HOTPLUG
 	help
 	  Say Y here to experiment with turning CPUs off and on.  CPUs
 	  can be controlled through /sys/devices/system/cpu/cpu#.

arch/x86/Kconfig

View file

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index fe120da..c49b4dc 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1725,7 +1725,7 @@ config PHYSICAL_ALIGN
 
 config HOTPLUG_CPU
 	bool "Support for hot-pluggable CPUs"
-	depends on SMP && HOTPLUG
+	depends on SMP
 	---help---
 	  Say Y here to allow turning CPUs off and on. CPUs can be
 	  controlled through /sys/devices/system/cpu.

drivers/base/Kconfig

View file

diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index 07abd9d..5daa259 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -2,7 +2,6 @@ menu "Generic Driver Options"
 
 config UEVENT_HELPER_PATH
 	string "path to uevent helper"
-	depends on HOTPLUG
 	default ""
 	help
 	  Path to uevent helper program forked by the kernel for
@@ -23,7 +22,6 @@ config UEVENT_HELPER_PATH
 
 config DEVTMPFS
 	bool "Maintain a devtmpfs filesystem to mount at /dev"
-	depends on HOTPLUG
 	help
 	  This creates a tmpfs/ramfs filesystem instance early at bootup.
 	  In this filesystem, the kernel driver core maintains device

drivers/base/core.c

View file

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 2499cef..6fdc53d 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -193,12 +193,12 @@ ssize_t device_show_bool(struct device *dev, struct device_attribute *attr,
 EXPORT_SYMBOL_GPL(device_show_bool);
 
 /**
- *	device_release - free device structure.
- *	@kobj:	device's kobject.
+ * device_release - free device structure.
+ * @kobj: device's kobject.
  *
- *	This is called once the reference count for the object
- *	reaches 0. We forward the call to the device's release
- *	method, which should handle actually freeing the structure.
+ * This is called once the reference count for the object
+ * reaches 0. We forward the call to the device's release
+ * method, which should handle actually freeing the structure.
  */
 static void device_release(struct kobject *kobj)
 {
@@ -1334,8 +1334,8 @@ const char *device_get_devnode(struct device *dev,
 /**
  * device_for_each_child - device child iterator.
  * @parent: parent struct device.
- * @data: data for the callback.
  * @fn: function to be called for each device.
+ * @data: data for the callback.
  *
  * Iterate over @parent's child devices, and call @fn for each,
  * passing it @data.
@@ -1363,8 +1363,8 @@ int device_for_each_child(struct device *parent, void *data,
 /**
  * device_find_child - device iterator for locating a particular device.
  * @parent: parent struct device
- * @data: Data to pass to match function
  * @match: Callback function to check device
+ * @data: Data to pass to match function
  *
  * This is similar to the device_for_each_child() function above, but it
  * returns a reference to a device that is 'found' for later use, as
@@ -1374,6 +1374,8 @@ int device_for_each_child(struct device *parent, void *data,
  * if it does.  If the callback returns non-zero and a reference to the
  * current device can be obtained, this function will return to the caller
  * and not iterate over any more devices.
+ *
+ * NOTE: you will need to drop the reference with put_device() after use.
  */
 struct device *device_find_child(struct device *parent, void *data,
 				 int (*match)(struct device *dev, void *data))

drivers/base/cpu.c

View file

diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 3d48fc8..c377673 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -85,18 +85,21 @@ static ssize_t __ref store_online(struct device *dev,
 }
 static DEVICE_ATTR(online, 0644, show_online, store_online);
 
-static void __cpuinit register_cpu_control(struct cpu *cpu)
-{
-	device_create_file(&cpu->dev, &dev_attr_online);
-}
+static struct attribute *hotplug_cpu_attrs[] = {
+	&dev_attr_online.attr,
+	NULL
+};
+
+static struct attribute_group hotplug_cpu_attr_group = {
+	.attrs = hotplug_cpu_attrs,
+};
+
 void unregister_cpu(struct cpu *cpu)
 {
 	int logical_cpu = cpu->dev.id;
 
 	unregister_cpu_under_node(logical_cpu, cpu_to_node(logical_cpu));
 
-	device_remove_file(&cpu->dev, &dev_attr_online);
-
 	device_unregister(&cpu->dev);
 	per_cpu(cpu_sys_devices, logical_cpu) = NULL;
 	return;
@@ -122,11 +125,6 @@ static ssize_t cpu_release_store(struct device *dev,
 static DEVICE_ATTR(probe, S_IWUSR, NULL, cpu_probe_store);
 static DEVICE_ATTR(release, S_IWUSR, NULL, cpu_release_store);
 #endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
-
-#else /* ... !CONFIG_HOTPLUG_CPU */
-static inline void register_cpu_control(struct cpu *cpu)
-{
-}
 #endif /* CONFIG_HOTPLUG_CPU */
 
 #ifdef CONFIG_KEXEC
@@ -164,8 +162,35 @@ static ssize_t show_crash_notes_size(struct device *dev,
 	return rc;
 }
 static DEVICE_ATTR(crash_notes_size, 0400, show_crash_notes_size, NULL);
+
+static struct attribute *crash_note_cpu_attrs[] = {
+	&dev_attr_crash_notes.attr,
+	&dev_attr_crash_notes_size.attr,
+	NULL
+};
+
+static struct attribute_group crash_note_cpu_attr_group = {
+	.attrs = crash_note_cpu_attrs,
+};
 #endif
 
+static const struct attribute_group *common_cpu_attr_groups[] = {
+#ifdef CONFIG_KEXEC
+	&crash_note_cpu_attr_group,
+#endif
+	NULL
+};
+
+static const struct attribute_group *hotplugable_cpu_attr_groups[] = {
+#ifdef CONFIG_KEXEC
+	&crash_note_cpu_attr_group,
+#endif
+#ifdef CONFIG_HOTPLUG_CPU
+	&hotplug_cpu_attr_group,
+#endif
+	NULL
+};
+
 /*
  * Print cpu online, possible, present, and system maps
  */
@@ -280,21 +305,15 @@ int __cpuinit register_cpu(struct cpu *cpu, int num)
 #ifdef CONFIG_ARCH_HAS_CPU_AUTOPROBE
 	cpu->dev.bus->uevent = arch_cpu_uevent;
 #endif
+	cpu->dev.groups = common_cpu_attr_groups;
+	if (cpu->hotpluggable)
+		cpu->dev.groups = hotplugable_cpu_attr_groups;
 	error = device_register(&cpu->dev);
-	if (!error && cpu->hotpluggable)
-		register_cpu_control(cpu);
 	if (!error)
 		per_cpu(cpu_sys_devices, num) = &cpu->dev;
 	if (!error)
 		register_cpu_under_node(num, cpu_to_node(num));
 
-#ifdef CONFIG_KEXEC
-	if (!error)
-		error = device_create_file(&cpu->dev, &dev_attr_crash_notes);
-	if (!error)
-		error = device_create_file(&cpu->dev,
-					   &dev_attr_crash_notes_size);
-#endif
 	return error;
 }
 

drivers/base/firmware_class.c

View file

diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 01e2103..a439602 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -27,6 +27,7 @@
 #include <linux/pm.h>
 #include <linux/suspend.h>
 #include <linux/syscore_ops.h>
+#include <linux/reboot.h>
 
 #include <generated/utsrelease.h>
 
@@ -127,9 +128,11 @@ struct firmware_buf {
 	size_t size;
 #ifdef CONFIG_FW_LOADER_USER_HELPER
 	bool is_paged_buf;
+	bool need_uevent;
 	struct page **pages;
 	int nr_pages;
 	int page_array_size;
+	struct list_head pending_list;
 #endif
 	char fw_id[];
 };
@@ -171,6 +174,9 @@ static struct firmware_buf *__allocate_fw_buf(const char *fw_name,
 	strcpy(buf->fw_id, fw_name);
 	buf->fwc = fwc;
 	init_completion(&buf->completion);
+#ifdef CONFIG_FW_LOADER_USER_HELPER
+	INIT_LIST_HEAD(&buf->pending_list);
+#endif
 
 	pr_debug("%s: fw-%s buf=%p\n", __func__, fw_name, buf);
 
@@ -212,18 +218,6 @@ static int fw_lookup_and_allocate_buf(const char *fw_name,
 	return tmp ? 0 : -ENOMEM;
 }
 
-static struct firmware_buf *fw_lookup_buf(const char *fw_name)
-{
-	struct firmware_buf *tmp;
-	struct firmware_cache *fwc = &fw_cache;
-
-	spin_lock(&fwc->lock);
-	tmp = __fw_lookup_buf(fw_name);
-	spin_unlock(&fwc->lock);
-
-	return tmp;
-}
-
 static void __fw_free_buf(struct kref *ref)
 {
 	struct firmware_buf *buf = to_fwbuf(ref);
@@ -446,10 +440,8 @@ static struct firmware_priv *to_firmware_priv(struct device *dev)
 	return container_of(dev, struct firmware_priv, dev);
 }
 
-static void fw_load_abort(struct firmware_priv *fw_priv)
+static void __fw_load_abort(struct firmware_buf *buf)
 {
-	struct firmware_buf *buf = fw_priv->buf;
-
 	/*
 	 * There is a small window in which user can write to 'loading'
 	 * between loading done and disappearance of 'loading'
@@ -457,8 +449,16 @@ static void fw_load_abort(struct firmware_priv *fw_priv)
 	if (test_bit(FW_STATUS_DONE, &buf->status))
 		return;
 
+	list_del_init(&buf->pending_list);
 	set_bit(FW_STATUS_ABORT, &buf->status);
 	complete_all(&buf->completion);
+}
+
+static void fw_load_abort(struct firmware_priv *fw_priv)
+{
+	struct firmware_buf *buf = fw_priv->buf;
+
+	__fw_load_abort(buf);
 
 	/* avoid user action after loading abort */
 	fw_priv->buf = NULL;
@@ -467,6 +467,25 @@ static void fw_load_abort(struct firmware_priv *fw_priv)
 #define is_fw_load_aborted(buf)	\
 	test_bit(FW_STATUS_ABORT, &(buf)->status)
 
+static LIST_HEAD(pending_fw_head);
+
+/* reboot notifier for avoid deadlock with usermode_lock */
+static int fw_shutdown_notify(struct notifier_block *unused1,
+			      unsigned long unused2, void *unused3)
+{
+	mutex_lock(&fw_lock);
+	while (!list_empty(&pending_fw_head))
+		__fw_load_abort(list_first_entry(&pending_fw_head,
+					       struct firmware_buf,
+					       pending_list));