Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 280 insertions, 0 deletions

diff --git a/drivers/macintosh/Kconfig b/drivers/macintosh/Kconfig
new file mode 100644
index 000000000..d00e713c1
--- /dev/null
+++ b/drivers/macintosh/Kconfig
@@ -0,0 +1,280 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+menuconfig MACINTOSH_DRIVERS
+	bool "Macintosh device drivers"
+	depends on PPC || MAC || X86
+	default y if (PPC_PMAC || MAC)
+	help
+	  Say Y here to get to see options for devices used with Macintosh
+	  computers. This option alone does not add any kernel code.
+
+	  If you say N, all options in this submenu will be skipped and disabled.
+
+if MACINTOSH_DRIVERS
+
+config ADB
+	bool "Apple Desktop Bus (ADB) support"
+	depends on MAC || (PPC_PMAC && PPC32)
+	help
+	  Apple Desktop Bus (ADB) support is for support of devices which
+	  are connected to an ADB port.  ADB devices tend to have 4 pins.
+	  If you have an Apple Macintosh prior to the iMac, an iBook or
+	  PowerBook, or a "Blue and White G3", you probably want to say Y
+	  here.  Otherwise say N.
+
+config ADB_MACII
+	bool "Include Mac II ADB driver"
+	depends on ADB && MAC
+	help
+	  Say Y here if want your kernel to support Macintosh systems that use
+	  the Mac II style ADB.  This includes the II, IIx, IIcx, SE/30, IIci,
+	  Quadra 610, Quadra 650, Quadra 700, Quadra 800, Centris 610 and
+	  Centris 650.
+
+config ADB_IOP
+	bool "Include IOP (IIfx/Quadra 9x0) ADB driver"
+	depends on ADB && MAC
+	help
+	  The I/O Processor (IOP) is an Apple custom IC designed to provide
+	  intelligent support for I/O controllers.  It is described at
+	  <http://www.angelfire.com/ca2/dev68k/iopdesc.html> to enable direct
+	  support for it, say 'Y' here.
+
+# we want to change this to something like CONFIG_SYSCTRL_CUDA/PMU
+config ADB_CUDA
+	bool "Support for Cuda/Egret based Macs and PowerMacs"
+	depends on (ADB || PPC_PMAC) && !PPC_PMAC64
+	select RTC_LIB
+	help
+	  This provides support for Cuda/Egret based Macintosh and
+	  Power Macintosh systems. This includes most m68k based Macs,
+	  most Old World PowerMacs, the first generation iMacs, the
+	  Blue & White G3 and the "Yikes" G4 (PCI Graphics). All later
+	  models should use CONFIG_ADB_PMU instead. It is safe to say Y
+	  here even if your machine doesn't have a Cuda or Egret device.
+
+	  If unsure say Y.
+
+config ADB_PMU
+	bool "Support for PMU based PowerMacs and PowerBooks"
+	depends on PPC_PMAC || MAC
+	select RTC_LIB
+	help
+	  On PowerBooks, iBooks, and recent iMacs and Power Macintoshes, the
+	  PMU is an embedded microprocessor whose primary function is to
+	  control system power, and battery charging on the portable models.
+	  The PMU also controls the ADB (Apple Desktop Bus) which connects to
+	  the keyboard and mouse on some machines, as well as the non-volatile
+	  RAM and the RTC (real time clock) chip.  Say Y to enable support for
+	  this device; you should do so if your machine is one of those
+	  mentioned above.
+
+config ADB_PMU_EVENT
+	def_bool y
+	depends on ADB_PMU && INPUT=y
+
+config ADB_PMU_LED
+	bool "Support for the Power/iBook front LED"
+	depends on PPC_PMAC && ADB_PMU
+	select NEW_LEDS
+	select LEDS_CLASS
+	help
+	  Support the front LED on Power/iBooks as a generic LED that can
+	  be triggered by any of the supported triggers. To get the
+	  behaviour of the old CONFIG_BLK_DEV_IDE_PMAC_BLINK, select this
+	  and the disk LED trigger and configure appropriately through sysfs.
+
+config ADB_PMU_LED_DISK
+	bool "Use front LED as DISK LED by default"
+	depends on ATA
+	depends on ADB_PMU_LED
+	depends on LEDS_CLASS
+	select LEDS_TRIGGERS
+	select LEDS_TRIGGER_DISK
+	help
+	  This option makes the front LED default to the disk trigger
+	  so that it blinks on disk activity.
+
+config PMAC_SMU
+	bool "Support for SMU  based PowerMacs"
+	depends on PPC_PMAC64
+	help
+	  This option adds support for the newer G5 iMacs and PowerMacs based
+	  on the "SMU" system control chip which replaces the old PMU.
+	  If you don't know, say Y.
+
+config PMAC_APM_EMU
+	tristate "APM emulation"
+	select APM_EMULATION
+	depends on ADB_PMU && PM && PPC32
+
+config PMAC_MEDIABAY
+	bool "Support PowerBook hotswap media bay"
+	depends on PPC_PMAC && PPC32 && BLOCK
+	help
+	  This option adds support for older PowerBook's hotswap media bay
+	  that can contains batteries, floppy drives, or IDE devices. PCI
+	  devices are not fully supported in the bay as I never had one to
+	  try with
+
+config PMAC_BACKLIGHT
+	bool "Backlight control for LCD screens"
+	depends on PPC_PMAC && ADB_PMU && FB = y && (BROKEN || !PPC64)
+	depends on BACKLIGHT_CLASS_DEVICE=y
+	select FB_BACKLIGHT
+	help
+	  Say Y here to enable Macintosh specific extensions of the generic
+	  backlight code. With this enabled, the brightness keys on older
+	  PowerBooks will be enabled so you can change the screen brightness.
+	  Newer models should use a userspace daemon like pbbuttonsd.
+
+config PMAC_BACKLIGHT_LEGACY
+	bool "Provide legacy ioctl's on /dev/pmu for the backlight"
+	depends on PMAC_BACKLIGHT && (BROKEN || !PPC64)
+	help
+	  Say Y if you want to enable legacy ioctl's on /dev/pmu. This is for
+	  programs which use this old interface. New and updated programs
+	  should use the backlight classes in sysfs.
+
+config ADB_MACIO
+	bool "Include MacIO (CHRP) ADB driver"
+	depends on ADB && PPC_CHRP && !PPC_PMAC64
+	help
+	  Say Y here to include direct support for the ADB controller in the
+	  Hydra chip used on PowerPC Macintoshes of the CHRP type.  (The Hydra
+	  also includes a MESH II SCSI controller, DBDMA controller, VIA chip,
+	  OpenPIC controller and two RS422/Geoports.)
+
+config INPUT_ADBHID
+	bool "Support for ADB input devices (keyboard, mice, ...)"
+	depends on ADB && INPUT=y
+	help
+	  Say Y here if you want to have ADB (Apple Desktop Bus) HID devices
+	  such as keyboards, mice, joysticks, trackpads  or graphic tablets
+	  handled by the input layer.  If you say Y here, make sure to say Y to
+	  the corresponding drivers "Mouse Support" (CONFIG_INPUT_MOUSEDEV) and
+	  "Event interface support" (CONFIG_INPUT_EVDEV) as well.
+
+	  If unsure, say Y.
+
+config MAC_EMUMOUSEBTN
+	tristate "Support for mouse button 2+3 emulation"
+	depends on SYSCTL && INPUT
+	help
+	  This provides generic support for emulating the 2nd and 3rd mouse
+	  button with keypresses.  If you say Y here, the emulation is still
+	  disabled by default.  The emulation is controlled by these sysctl
+	  entries:
+	  /proc/sys/dev/mac_hid/mouse_button_emulation
+	  /proc/sys/dev/mac_hid/mouse_button2_keycode
+	  /proc/sys/dev/mac_hid/mouse_button3_keycode
+
+	  If you have an Apple machine with a 1-button mouse, say Y here.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called mac_hid.
+
+config THERM_WINDTUNNEL
+	tristate "Support for thermal management on Windtunnel G4s"
+	depends on I2C && I2C_POWERMAC && PPC_PMAC && !PPC_PMAC64
+	help
+	  This driver provides some thermostat and fan control for the desktop
+	  G4 "Windtunnel"
+
+config THERM_ADT746X
+	tristate "Support for thermal mgmnt on laptops with ADT 746x chipset"
+	depends on I2C && I2C_POWERMAC && PPC_PMAC && !PPC_PMAC64
+	help
+	  This driver provides some thermostat and fan control for the
+	  iBook G4, and the ATI based aluminium PowerBooks, allowing slightly
+	  better fan behaviour by default, and some manual control.
+
+config WINDFARM
+	tristate "New PowerMac thermal control infrastructure"
+	depends on PPC
+
+config WINDFARM_PM81
+	tristate "Support for thermal management on iMac G5"
+	depends on WINDFARM && I2C && CPU_FREQ_PMAC64 && PMAC_SMU
+	select I2C_POWERMAC
+	help
+	  This driver provides thermal control for the iMacG5
+
+config WINDFARM_PM72
+	tristate "Support for thermal management on PowerMac G5 (AGP)"
+	depends on WINDFARM && I2C && CPU_FREQ_PMAC64 && ADB_PMU
+	select I2C_POWERMAC
+	help
+	  This driver provides thermal control for the PowerMac G5
+	  "AGP" variants (PowerMac 7,2 and 7,3)
+
+config WINDFARM_RM31
+	tristate "Support for thermal management on Xserve G5"
+	depends on WINDFARM && I2C && CPU_FREQ_PMAC64 && ADB_PMU
+	select I2C_POWERMAC
+	help
+	  This driver provides thermal control for the Xserve G5
+	  (RackMac3,1)
+
+config WINDFARM_PM91
+	tristate "Support for thermal management on PowerMac9,1"
+	depends on WINDFARM && I2C && CPU_FREQ_PMAC64 && PMAC_SMU
+	select I2C_POWERMAC
+	help
+	  This driver provides thermal control for the PowerMac9,1
+	  which is the recent (SMU based) single CPU desktop G5
+
+config WINDFARM_PM112
+	tristate "Support for thermal management on PowerMac11,2"
+	depends on WINDFARM && I2C && PMAC_SMU
+	select I2C_POWERMAC
+	help
+	  This driver provides thermal control for the PowerMac11,2
+	  which are the recent dual and quad G5 machines using the
+	  970MP dual-core processor.
+
+config WINDFARM_PM121
+	tristate "Support for thermal management on PowerMac12,1"
+	depends on WINDFARM && I2C && PMAC_SMU
+	select I2C_POWERMAC
+	help
+	  This driver provides thermal control for the PowerMac12,1
+	  which is the iMac G5 (iSight).
+
+config ANSLCD
+	tristate "Support for ANS LCD display"
+	depends on ADB_CUDA && PPC_PMAC
+
+config PMAC_RACKMETER
+	tristate "Support for Apple XServe front panel LEDs"
+	depends on PPC_PMAC
+	help
+	  This driver provides some support to control the front panel
+	  blue LEDs "vu-meter" of the XServer macs.
+
+config SENSORS_AMS
+	tristate "Apple Motion Sensor driver"
+	depends on PPC_PMAC && !PPC64 && INPUT && ((ADB_PMU && I2C = y) || (ADB_PMU && !I2C) || I2C)
+	help
+	  Support for the motion sensor included in PowerBooks. Includes
+	  implementations for PMU and I2C.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called ams.
+
+config SENSORS_AMS_PMU
+	bool "PMU variant" if SENSORS_AMS_I2C
+	depends on SENSORS_AMS && ADB_PMU
+	default y
+	help
+	  PMU variant of motion sensor, found in late 2005 PowerBooks.
+
+config SENSORS_AMS_I2C
+	bool "I2C variant"
+	depends on SENSORS_AMS && I2C
+	default y
+	help
+	  I2C variant of motion sensor, found in early 2005 PowerBooks and
+	  iBooks.
+
+endif # MACINTOSH_DRIVERS