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, 147 insertions, 0 deletions

diff --git a/include/video/trident.h b/include/video/trident.h
new file mode 100644
index 000000000..5ccc0d6a0
--- /dev/null
+++ b/include/video/trident.h
@@ -0,0 +1,147 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef TRIDENTFB_DEBUG
+#define TRIDENTFB_DEBUG 0
+#endif
+
+#if TRIDENTFB_DEBUG
+#define debug(f, a...)	printk("%s:" f,  __func__ , ## a);
+#else
+#define debug(f, a...)
+#endif
+
+#define output(f, a...) pr_info("tridentfb: " f, ## a)
+
+#define Kb	(1024)
+#define Mb	(Kb*Kb)
+
+/* PCI IDS of supported cards temporarily here */
+
+#define CYBER9320	0x9320
+#define CYBER9388	0x9388
+#define CYBER9382	0x9382		/* the real PCI id for this is 9660 */
+#define CYBER9385	0x9385		/* ditto */		
+#define CYBER9397	0x9397
+#define CYBER9397DVD	0x939A
+#define CYBER9520	0x9520
+#define CYBER9525DVD	0x9525
+#define TGUI9440	0x9440
+#define TGUI9660	0x9660
+#define PROVIDIA9685	0x9685
+#define IMAGE975	0x9750
+#define IMAGE985	0x9850
+#define BLADE3D		0x9880
+#define CYBERBLADEE4	0x9540
+#define CYBERBLADEi7	0x8400
+#define CYBERBLADEi7D	0x8420
+#define CYBERBLADEi1	0x8500
+#define CYBERBLADEi1D	0x8520
+#define CYBERBLADEAi1	0x8600
+#define CYBERBLADEAi1D	0x8620
+#define CYBERBLADEXPAi1 0x8820
+#define CYBERBLADEXPm8  0x9910
+#define CYBERBLADEXPm16 0x9930
+
+/* these defines are for 'lcd' variable */
+#define LCD_STRETCH	0
+#define LCD_CENTER	1
+#define LCD_BIOS	2
+
+/* General Registers */
+#define SPR	0x1F		/* Software Programming Register (videoram) */
+
+/* 3C4 */
+#define RevisionID 0x09
+#define OldOrNew 0x0B	
+#define ConfPort1 0x0C
+#define ConfPort2 0x0C
+#define NewMode2 0x0D
+#define NewMode1 0x0E
+#define Protection 0x11
+#define MCLKLow 0x16
+#define MCLKHigh 0x17
+#define ClockLow 0x18
+#define ClockHigh 0x19
+#define SSetup 0x20
+#define SKey 0x37
+#define SPKey 0x57
+
+/* 3x4 */
+#define CRTCModuleTest 0x1E
+#define FIFOControl 0x20
+#define LinearAddReg 0x21
+#define DRAMTiming 0x23
+#define New32 0x23
+#define RAMDACTiming 0x25
+#define CRTHiOrd 0x27
+#define AddColReg 0x29
+#define InterfaceSel 0x2A
+#define HorizOverflow 0x2B
+#define GETest 0x2D
+#define Performance 0x2F
+#define GraphEngReg 0x36
+#define I2C 0x37
+#define PixelBusReg 0x38
+#define PCIReg 0x39
+#define DRAMControl 0x3A
+#define MiscContReg 0x3C
+#define CursorXLow 0x40
+#define CursorXHigh 0x41
+#define CursorYLow 0x42
+#define CursorYHigh 0x43
+#define CursorLocLow 0x44
+#define CursorLocHigh 0x45
+#define CursorXOffset 0x46
+#define CursorYOffset 0x47
+#define CursorFG1 0x48
+#define CursorFG2 0x49
+#define CursorFG3 0x4A
+#define CursorFG4 0x4B
+#define CursorBG1 0x4C
+#define CursorBG2 0x4D
+#define CursorBG3 0x4E
+#define CursorBG4 0x4F
+#define CursorControl 0x50
+#define PCIRetry 0x55
+#define PreEndControl 0x56
+#define PreEndFetch 0x57
+#define PCIMaster 0x60
+#define Enhancement0 0x62
+#define NewEDO 0x64
+#define TVinterface 0xC0
+#define TVMode 0xC1
+#define ClockControl 0xCF
+
+
+/* 3CE */
+#define MiscExtFunc 0x0F
+#define PowerStatus 0x23
+#define MiscIntContReg 0x2F
+#define CyberControl 0x30
+#define CyberEnhance 0x31
+#define FPConfig     0x33
+#define VertStretch  0x52
+#define HorStretch   0x53
+#define BiosMode     0x5c
+#define BiosReg      0x5d
+
+/* Graphics Engine */
+#define STATUS	0x2120
+#define OLDCMD	0x2124
+#define DRAWFL	0x2128
+#define OLDCLR	0x212C
+#define OLDDST	0x2138
+#define OLDSRC	0x213C
+#define OLDDIM	0x2140
+#define CMD	0x2144
+#define ROP	0x2148
+#define COLOR	0x2160
+#define BGCOLOR	0x2164
+#define SRC1	0x2100
+#define SRC2	0x2104
+#define DST1	0x2108
+#define DST2	0x210C
+
+#define ROP_S	0xCC
+#define ROP_P	0xF0
+#define ROP_X	0x66