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, 97 insertions, 0 deletions

diff --git a/include/dt-bindings/clock/sun5i-ccu.h b/include/dt-bindings/clock/sun5i-ccu.h
new file mode 100644
index 000000000..75fe5619c
--- /dev/null
+++ b/include/dt-bindings/clock/sun5i-ccu.h
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 2016 Maxime Ripard
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ */
+
+#ifndef _DT_BINDINGS_CLK_SUN5I_H_
+#define _DT_BINDINGS_CLK_SUN5I_H_
+
+#define CLK_HOSC		1
+
+#define CLK_PLL_VIDEO0_2X	9
+
+#define CLK_PLL_VIDEO1_2X	16
+#define CLK_CPU			17
+
+#define CLK_AHB_OTG		23
+#define CLK_AHB_EHCI		24
+#define CLK_AHB_OHCI		25
+#define CLK_AHB_SS		26
+#define CLK_AHB_DMA		27
+#define CLK_AHB_BIST		28
+#define CLK_AHB_MMC0		29
+#define CLK_AHB_MMC1		30
+#define CLK_AHB_MMC2		31
+#define CLK_AHB_NAND		32
+#define CLK_AHB_SDRAM		33
+#define CLK_AHB_EMAC		34
+#define CLK_AHB_TS		35
+#define CLK_AHB_SPI0		36
+#define CLK_AHB_SPI1		37
+#define CLK_AHB_SPI2		38
+#define CLK_AHB_GPS		39
+#define CLK_AHB_HSTIMER		40
+#define CLK_AHB_VE		41
+#define CLK_AHB_TVE		42
+#define CLK_AHB_LCD		43
+#define CLK_AHB_CSI		44
+#define CLK_AHB_HDMI		45
+#define CLK_AHB_DE_BE		46
+#define CLK_AHB_DE_FE		47
+#define CLK_AHB_IEP		48
+#define CLK_AHB_GPU		49
+#define CLK_APB0_CODEC		50
+#define CLK_APB0_SPDIF		51
+#define CLK_APB0_I2S		52
+#define CLK_APB0_PIO		53
+#define CLK_APB0_IR		54
+#define CLK_APB0_KEYPAD		55
+#define CLK_APB1_I2C0		56
+#define CLK_APB1_I2C1		57
+#define CLK_APB1_I2C2		58
+#define CLK_APB1_UART0		59
+#define CLK_APB1_UART1		60
+#define CLK_APB1_UART2		61
+#define CLK_APB1_UART3		62
+#define CLK_NAND		63
+#define CLK_MMC0		64
+#define CLK_MMC1		65
+#define CLK_MMC2		66
+#define CLK_TS			67
+#define CLK_SS			68
+#define CLK_SPI0		69
+#define CLK_SPI1		70
+#define CLK_SPI2		71
+#define CLK_IR			72
+#define CLK_I2S			73
+#define CLK_SPDIF		74
+#define CLK_KEYPAD		75
+#define CLK_USB_OHCI		76
+#define CLK_USB_PHY0		77
+#define CLK_USB_PHY1		78
+#define CLK_GPS			79
+#define CLK_DRAM_VE		80
+#define CLK_DRAM_CSI		81
+#define CLK_DRAM_TS		82
+#define CLK_DRAM_TVE		83
+#define CLK_DRAM_DE_FE		84
+#define CLK_DRAM_DE_BE		85
+#define CLK_DRAM_ACE		86
+#define CLK_DRAM_IEP		87
+#define CLK_DE_BE		88
+#define CLK_DE_FE		89
+#define CLK_TCON_CH0		90
+
+#define CLK_TCON_CH1		92
+#define CLK_CSI			93
+#define CLK_VE			94
+#define CLK_CODEC		95
+#define CLK_AVS			96
+#define CLK_HDMI		97
+#define CLK_GPU			98
+#define CLK_MBUS		99
+#define CLK_IEP			100
+
+#endif /* _DT_BINDINGS_CLK_SUN5I_H_ */