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, 70 insertions, 0 deletions

diff --git a/include/dt-bindings/clock/histb-clock.h b/include/dt-bindings/clock/histb-clock.h
new file mode 100644
index 000000000..e64e5770a
--- /dev/null
+++ b/include/dt-bindings/clock/histb-clock.h
@@ -0,0 +1,70 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2016 HiSilicon Technologies Co., Ltd.
+ */
+
+#ifndef __DTS_HISTB_CLOCK_H
+#define __DTS_HISTB_CLOCK_H
+
+/* clocks provided by core CRG */
+#define HISTB_OSC_CLK			0
+#define HISTB_APB_CLK			1
+#define HISTB_AHB_CLK			2
+#define HISTB_UART1_CLK			3
+#define HISTB_UART2_CLK			4
+#define HISTB_UART3_CLK			5
+#define HISTB_I2C0_CLK			6
+#define HISTB_I2C1_CLK			7
+#define HISTB_I2C2_CLK			8
+#define HISTB_I2C3_CLK			9
+#define HISTB_I2C4_CLK			10
+#define HISTB_I2C5_CLK			11
+#define HISTB_SPI0_CLK			12
+#define HISTB_SPI1_CLK			13
+#define HISTB_SPI2_CLK			14
+#define HISTB_SCI_CLK			15
+#define HISTB_FMC_CLK			16
+#define HISTB_MMC_BIU_CLK		17
+#define HISTB_MMC_CIU_CLK		18
+#define HISTB_MMC_DRV_CLK		19
+#define HISTB_MMC_SAMPLE_CLK		20
+#define HISTB_SDIO0_BIU_CLK		21
+#define HISTB_SDIO0_CIU_CLK		22
+#define HISTB_SDIO0_DRV_CLK		23
+#define HISTB_SDIO0_SAMPLE_CLK		24
+#define HISTB_PCIE_AUX_CLK		25
+#define HISTB_PCIE_PIPE_CLK		26
+#define HISTB_PCIE_SYS_CLK		27
+#define HISTB_PCIE_BUS_CLK		28
+#define HISTB_ETH0_MAC_CLK		29
+#define HISTB_ETH0_MACIF_CLK		30
+#define HISTB_ETH1_MAC_CLK		31
+#define HISTB_ETH1_MACIF_CLK		32
+#define HISTB_COMBPHY1_CLK		33
+#define HISTB_USB2_BUS_CLK		34
+#define HISTB_USB2_PHY_CLK		35
+#define HISTB_USB2_UTMI_CLK		36
+#define HISTB_USB2_12M_CLK		37
+#define HISTB_USB2_48M_CLK		38
+#define HISTB_USB2_OTG_UTMI_CLK		39
+#define HISTB_USB2_PHY1_REF_CLK		40
+#define HISTB_USB2_PHY2_REF_CLK		41
+#define HISTB_COMBPHY0_CLK		42
+#define HISTB_USB3_BUS_CLK		43
+#define HISTB_USB3_UTMI_CLK		44
+#define HISTB_USB3_PIPE_CLK		45
+#define HISTB_USB3_SUSPEND_CLK		46
+#define HISTB_USB3_BUS_CLK1		47
+#define HISTB_USB3_UTMI_CLK1		48
+#define HISTB_USB3_PIPE_CLK1		49
+#define HISTB_USB3_SUSPEND_CLK1		50
+
+/* clocks provided by mcu CRG */
+#define HISTB_MCE_CLK			1
+#define HISTB_IR_CLK			2
+#define HISTB_TIMER01_CLK		3
+#define HISTB_LEDC_CLK			4
+#define HISTB_UART0_CLK			5
+#define HISTB_LSADC_CLK			6
+
+#endif	/* __DTS_HISTB_CLOCK_H */