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, 230 insertions, 0 deletions

diff --git a/drivers/pinctrl/bcm/Kconfig b/drivers/pinctrl/bcm/Kconfig
new file mode 100644
index 000000000..19d22e7fd
--- /dev/null
+++ b/drivers/pinctrl/bcm/Kconfig
@@ -0,0 +1,230 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Broadcom pinctrl drivers
+#
+
+config PINCTRL_BCM281XX
+	bool "Broadcom BCM281xx pinctrl driver"
+	depends on OF && (ARCH_BCM_MOBILE || COMPILE_TEST)
+	select PINMUX
+	select PINCONF
+	select GENERIC_PINCONF
+	select REGMAP_MMIO
+	default ARCH_BCM_MOBILE
+	help
+	  Say Y here to support Broadcom BCM281xx pinctrl driver, which is used
+	  for the BCM281xx SoC family, including BCM11130, BCM11140, BCM11351,
+	  BCM28145, and BCM28155 SoCs.  This driver requires the pinctrl
+	  framework.  GPIO is provided by a separate GPIO driver.
+
+config PINCTRL_BCM2835
+	tristate "Broadcom BCM2835 GPIO (with PINCONF) driver"
+	depends on OF && (ARCH_BCM2835 || ARCH_BRCMSTB || COMPILE_TEST)
+	select PINMUX
+	select PINCONF
+	select GENERIC_PINCONF
+	select GPIOLIB
+	select GPIOLIB_IRQCHIP
+	default ARCH_BCM2835 || ARCH_BRCMSTB
+	help
+	   Say Y here to enable the Broadcom BCM2835 GPIO driver.
+
+config PINCTRL_BCM4908
+	tristate "Broadcom BCM4908 pinmux driver"
+	depends on OF && (ARCH_BCMBCA || COMPILE_TEST)
+	select PINMUX
+	select PINCONF
+	select GENERIC_PINCONF
+	select GENERIC_PINCTRL_GROUPS
+	select GENERIC_PINMUX_FUNCTIONS
+	default ARCH_BCMBCA
+	help
+	  Driver for BCM4908 family SoCs with integrated pin controller.
+
+	  If compiled as module it will be called pinctrl-bcm4908.
+
+config PINCTRL_BCM63XX
+	bool
+	select PINMUX
+	select PINCONF
+	select GENERIC_PINCONF
+	select GPIOLIB
+	select REGMAP
+	select GPIO_REGMAP
+
+config PINCTRL_BCM6318
+	bool "Broadcom BCM6318 GPIO driver"
+	depends on (BMIPS_GENERIC || COMPILE_TEST)
+	depends on OF
+	select PINCTRL_BCM63XX
+	default BMIPS_GENERIC
+	help
+	   Say Y here to enable the Broadcom BCM6318 GPIO driver.
+
+config PINCTRL_BCM6328
+	bool "Broadcom BCM6328 GPIO driver"
+	depends on (BMIPS_GENERIC || COMPILE_TEST)
+	depends on OF
+	select PINCTRL_BCM63XX
+	default BMIPS_GENERIC
+	help
+	   Say Y here to enable the Broadcom BCM6328 GPIO driver.
+
+config PINCTRL_BCM6358
+	bool "Broadcom BCM6358 GPIO driver"
+	depends on (BMIPS_GENERIC || COMPILE_TEST)
+	depends on OF
+	select PINCTRL_BCM63XX
+	default BMIPS_GENERIC
+	help
+	   Say Y here to enable the Broadcom BCM6358 GPIO driver.
+
+config PINCTRL_BCM6362
+	bool "Broadcom BCM6362 GPIO driver"
+	depends on (BMIPS_GENERIC || COMPILE_TEST)
+	depends on OF
+	select PINCTRL_BCM63XX
+	default BMIPS_GENERIC
+	help
+	   Say Y here to enable the Broadcom BCM6362 GPIO driver.
+
+config PINCTRL_BCM6368
+	bool "Broadcom BCM6368 GPIO driver"
+	depends on (BMIPS_GENERIC || COMPILE_TEST)
+	depends on OF
+	select PINCTRL_BCM63XX
+	default BMIPS_GENERIC
+	help
+	   Say Y here to enable the Broadcom BCM6368 GPIO driver.
+
+config PINCTRL_BCM63268
+	bool "Broadcom BCM63268 GPIO driver"
+	depends on (BMIPS_GENERIC || COMPILE_TEST)
+	depends on OF
+	select PINCTRL_BCM63XX
+	default BMIPS_GENERIC
+	help
+	   Say Y here to enable the Broadcom BCM63268 GPIO driver.
+
+config PINCTRL_BRCMSTB
+        tristate "Broadcom STB product line pin controller driver"
+        depends on OF && (ARCH_BCM2835 || ARCH_BRCMSTB || COMPILE_TEST)
+        select PINMUX
+        select PINCONF
+        select GENERIC_PINCONF
+        help
+          Enable pin muxing and configuration functionality
+          for Broadcom STB product line chipsets.
+
+source "drivers/pinctrl/bcm/Kconfig.stb"
+
+config PINCTRL_IPROC_GPIO
+	bool "Broadcom iProc GPIO (with PINCONF) driver"
+	depends on ARCH_BCM_IPROC || COMPILE_TEST
+	select GPIOLIB
+	select GPIOLIB_IRQCHIP
+	select PINCONF
+	select GENERIC_PINCONF
+	default ARCH_BCM_IPROC
+	help
+	  Say yes here to enable the Broadcom iProc GPIO driver.
+
+	  The Broadcom iProc based SoCs- Cygnus, NS2, NSP and Stingray, use
+	  same GPIO Controller IP hence this driver could be used for all.
+
+	  The Broadcom Cygnus SoC has 3 GPIO controllers including the ASIU
+	  GPIO controller (ASIU), the chipCommonG GPIO controller (CCM), and
+	  the always-ON GPIO controller (CRMU/AON). All 3 GPIO controllers are
+	  supported by this driver.
+
+	  The Broadcom NSP has two GPIO controllers including the ChipcommonA
+	  GPIO, the ChipcommonB GPIO. Later controller is supported by this
+	  driver.
+
+	  The Broadcom NS2 has two GPIO controller including the CRMU GPIO,
+	  the ChipcommonG GPIO. Both controllers are supported by this driver.
+
+	  The Broadcom Stingray GPIO controllers are supported by this driver.
+
+	  All above SoCs GPIO controllers support basic PINCONF functions such
+	  as bias pull up, pull down, and drive strength configurations, when
+	  these pins are muxed to GPIO.
+
+	  It provides the framework where pins from the individual GPIO can be
+	  individually muxed to GPIO function, through interaction with the
+	  SoCs IOMUX controller. This features could be used only on SoCs which
+	  support individual pin muxing.
+
+config PINCTRL_CYGNUS_MUX
+	bool "Broadcom Cygnus IOMUX driver"
+	depends on (ARCH_BCM_CYGNUS || COMPILE_TEST)
+	depends on OF
+	select PINMUX
+	select GENERIC_PINCONF
+	default ARCH_BCM_CYGNUS
+	help
+	  Say yes here to enable the Broadcom Cygnus IOMUX driver.
+
+	  The Broadcom Cygnus IOMUX driver supports group based IOMUX
+	  configuration, with the exception that certain individual pins
+	  can be overridden to GPIO function
+
+config PINCTRL_NS
+	bool "Broadcom Northstar pins driver"
+	depends on OF && (ARCH_BCM_5301X || COMPILE_TEST)
+	select PINMUX
+	select GENERIC_PINCONF
+	select GENERIC_PINCTRL_GROUPS
+	select GENERIC_PINMUX_FUNCTIONS
+	default ARCH_BCM_5301X
+	help
+	  Say yes here to enable the Broadcom NS SoC pins driver.
+
+	  The Broadcom Northstar pins driver supports muxing multi-purpose pins
+	  that can be used for various functions (e.g. SPI, I2C, UART) as well
+	  as GPIOs.
+
+config PINCTRL_NSP_GPIO
+	bool "Broadcom NSP GPIO (with PINCONF) driver"
+	depends on ARCH_BCM_NSP || COMPILE_TEST
+	select GPIOLIB
+	select GPIOLIB_IRQCHIP
+	select PINCONF
+	select GENERIC_PINCONF
+	default ARCH_BCM_NSP
+	help
+	  Say yes here to enable the Broadcom NSP GPIO driver.
+
+	  The Broadcom Northstar Plus SoC ChipcommonA GPIO controller is
+	  supported by this driver.
+
+	  The ChipcommonA GPIO controller support basic PINCONF functions such
+	  as bias pull up, pull down, and drive strength configurations, when
+	  these pins are muxed to GPIO.
+
+config PINCTRL_NS2_MUX
+	bool "Broadcom Northstar2 pinmux driver"
+	depends on OF
+	depends on ARCH_BCM_IPROC || COMPILE_TEST
+	select PINMUX
+	select GENERIC_PINCONF
+	default ARM64 && ARCH_BCM_IPROC
+	help
+	  Say yes here to enable the Broadcom NS2 MUX driver.
+
+	  The Broadcom Northstar2 IOMUX driver supports group based IOMUX
+	  configuration.
+
+config PINCTRL_NSP_MUX
+	bool "Broadcom NSP IOMUX driver"
+	depends on (ARCH_BCM_NSP || COMPILE_TEST)
+	depends on OF
+	select PINMUX
+	select GENERIC_PINCONF
+	default ARCH_BCM_NSP
+	help
+	  Say yes here to enable the Broadcom NSP SOC IOMUX driver.
+
+	  The Broadcom Northstar Plus IOMUX driver supports pin based IOMUX
+	  configuration, with certain individual pins can be overridden
+	  to GPIO function.