ftrace: Synchronize the initialization of ftrace_opsgrafted

There's some internal state that ftrace_ops needs to have set, but since
it can be declared outside of the ftrace.c code, it calls
ftrace_ops_init() on the ops in every global function. The issue is that
if two tasks call it on the same ops at the same time it is possible to
have the initialization of one corrupt the initialization of the other
call.

Create a ops_mutex to use to synchronize every initialization of the
ftrace_ops. The mutex is taken within checking the ftrace_ops flag that
states it was initializied but the flag is checked again after the mutex
has been taken. Checking first outside the mutex allows it to shortcut
having to take the mutex. But then the check needs to be done again after
the mute is taken in case of races.

Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home
Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock")
Reported-by: sashiko-bot@kernel.org
Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 99 insertions, 0 deletions

diff --git a/Documentation/gpu/kms-properties.csv b/Documentation/gpu/kms-properties.csv
new file mode 100644
index 000000000..bfbfbf4f1
--- /dev/null
+++ b/Documentation/gpu/kms-properties.csv
@@ -0,0 +1,99 @@
+Owner Module/Drivers,Group,Property Name,Type,Property Values,Object attached,Description/Restrictions
+,DVI-I,“subconnector”,ENUM,"{ “Unknown”, “DVI-D”, “DVI-A” }",Connector,TBD
+,,“select subconnector”,ENUM,"{ “Automatic”, “DVI-D”, “DVI-A” }",Connector,TBD
+,TV,“subconnector”,ENUM,"{ ""Unknown"", ""Composite"", ""SVIDEO"", ""Component"", ""SCART"" }",Connector,TBD
+,,“select subconnector”,ENUM,"{ ""Automatic"", ""Composite"", ""SVIDEO"", ""Component"", ""SCART"" }",Connector,TBD
+,,“mode”,ENUM,"{ ""NTSC_M"", ""NTSC_J"", ""NTSC_443"", ""PAL_B"" } etc.",Connector,TBD
+,,“left margin”,RANGE,"Min=0, Max=100",Connector,TBD
+,,“right margin”,RANGE,"Min=0, Max=100",Connector,TBD
+,,“top margin”,RANGE,"Min=0, Max=100",Connector,TBD
+,,“bottom margin”,RANGE,"Min=0, Max=100",Connector,TBD
+,,“brightness”,RANGE,"Min=0, Max=100",Connector,TBD
+,,“contrast”,RANGE,"Min=0, Max=100",Connector,TBD
+,,“flicker reduction”,RANGE,"Min=0, Max=100",Connector,TBD
+,,“overscan”,RANGE,"Min=0, Max=100",Connector,TBD
+,,“saturation”,RANGE,"Min=0, Max=100",Connector,TBD
+,,“hue”,RANGE,"Min=0, Max=100",Connector,TBD
+,Virtual GPU,“suggested X”,RANGE,"Min=0, Max=0xffffffff",Connector,property to suggest an X offset for a connector
+,,“suggested Y”,RANGE,"Min=0, Max=0xffffffff",Connector,property to suggest an Y offset for a connector
+,Optional,"""aspect ratio""",ENUM,"{ ""None"", ""4:3"", ""16:9"" }",Connector,TDB
+,,“audio”,ENUM,"{ ""force-dvi"", ""off"", ""auto"", ""on"" }",Connector,TBD
+,SDVO-TV,“mode”,ENUM,"{ ""NTSC_M"", ""NTSC_J"", ""NTSC_443"", ""PAL_B"" } etc.",Connector,TBD
+,,"""left_margin""",RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,"""right_margin""",RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,"""top_margin""",RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,"""bottom_margin""",RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“hpos”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“vpos”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“contrast”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“saturation”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“hue”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“sharpness”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“flicker_filter”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“flicker_filter_adaptive”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“flicker_filter_2d”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“tv_chroma_filter”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“tv_luma_filter”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“dot_crawl”,RANGE,"Min=0, Max=1",Connector,TBD
+,SDVO-TV/LVDS,“brightness”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+CDV gma-500,Generic,"""Broadcast RGB""",ENUM,"{ “Full”, “Limited 16:235” }",Connector,TBD
+Poulsbo,Generic,“backlight”,RANGE,"Min=0, Max=100",Connector,TBD
+,SDVO-TV,“mode”,ENUM,"{ ""NTSC_M"", ""NTSC_J"", ""NTSC_443"", ""PAL_B"" } etc.",Connector,TBD
+,,"""left_margin""",RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,"""right_margin""",RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,"""top_margin""",RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,"""bottom_margin""",RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“hpos”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“vpos”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“contrast”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“saturation”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“hue”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“sharpness”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“flicker_filter”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“flicker_filter_adaptive”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“flicker_filter_2d”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“tv_chroma_filter”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“tv_luma_filter”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+,,“dot_crawl”,RANGE,"Min=0, Max=1",Connector,TBD
+,SDVO-TV/LVDS,“brightness”,RANGE,"Min=0, Max= SDVO dependent",Connector,TBD
+armada,CRTC,"""CSC_YUV""",ENUM,"{ ""Auto"" , ""CCIR601"", ""CCIR709"" }",CRTC,TBD
+,,"""CSC_RGB""",ENUM,"{ ""Auto"", ""Computer system"", ""Studio"" }",CRTC,TBD
+,Overlay,"""colorkey""",RANGE,"Min=0, Max=0xffffff",Plane,TBD
+,,"""colorkey_min""",RANGE,"Min=0, Max=0xffffff",Plane,TBD
+,,"""colorkey_max""",RANGE,"Min=0, Max=0xffffff",Plane,TBD
+,,"""colorkey_val""",RANGE,"Min=0, Max=0xffffff",Plane,TBD
+,,"""colorkey_alpha""",RANGE,"Min=0, Max=0xffffff",Plane,TBD
+,,"""colorkey_mode""",ENUM,"{ ""disabled"", ""Y component"", ""U component"" , ""V component"", ""RGB"", “R component"", ""G component"", ""B component"" }",Plane,TBD
+,,"""brightness""",RANGE,"Min=0, Max=256 + 255",Plane,TBD
+,,"""contrast""",RANGE,"Min=0, Max=0x7fff",Plane,TBD
+,,"""saturation""",RANGE,"Min=0, Max=0x7fff",Plane,TBD
+exynos,CRTC,“mode”,ENUM,"{ ""normal"", ""blank"" }",CRTC,TBD
+i2c/ch7006_drv,Generic,“scale”,RANGE,"Min=0, Max=2",Connector,TBD
+,TV,“mode”,ENUM,"{ ""PAL"", ""PAL-M"",""PAL-N""}, ”PAL-Nc"" , ""PAL-60"", ""NTSC-M"", ""NTSC-J"" }",Connector,TBD
+nouveau,NV10 Overlay,"""colorkey""",RANGE,"Min=0, Max=0x01ffffff",Plane,TBD
+,,“contrast”,RANGE,"Min=0, Max=8192-1",Plane,TBD
+,,“brightness”,RANGE,"Min=0, Max=1024",Plane,TBD
+,,“hue”,RANGE,"Min=0, Max=359",Plane,TBD
+,,“saturation”,RANGE,"Min=0, Max=8192-1",Plane,TBD
+,,“iturbt_709”,RANGE,"Min=0, Max=1",Plane,TBD
+,Nv04 Overlay,“colorkey”,RANGE,"Min=0, Max=0x01ffffff",Plane,TBD
+,,“brightness”,RANGE,"Min=0, Max=1024",Plane,TBD
+,Display,“dithering mode”,ENUM,"{ ""auto"", ""off"", ""on"" }",Connector,TBD
+,,“dithering depth”,ENUM,"{ ""auto"", ""off"", ""on"", ""static 2x2"", ""dynamic 2x2"", ""temporal"" }",Connector,TBD
+,,“underscan”,ENUM,"{ ""auto"", ""6 bpc"", ""8 bpc"" }",Connector,TBD
+,,“underscan hborder”,RANGE,"Min=0, Max=128",Connector,TBD
+,,“underscan vborder”,RANGE,"Min=0, Max=128",Connector,TBD
+,,“vibrant hue”,RANGE,"Min=0, Max=180",Connector,TBD
+,,“color vibrance”,RANGE,"Min=0, Max=200",Connector,TBD
+omap,Generic,“zorder”,RANGE,"Min=0, Max=3","CRTC, Plane",TBD
+qxl,Generic,"“hotplug_mode_update""",RANGE,"Min=0, Max=1",Connector,TBD
+radeon,DVI-I,“coherent”,RANGE,"Min=0, Max=1",Connector,TBD
+,DAC enable load detect,“load detection”,RANGE,"Min=0, Max=1",Connector,TBD
+,TV Standard,"""tv standard""",ENUM,"{ ""ntsc"", ""pal"", ""pal-m"", ""pal-60"", ""ntsc-j"" , ""scart-pal"", ""pal-cn"", ""secam"" }",Connector,TBD
+,legacy TMDS PLL detect,"""tmds_pll""",ENUM,"{ ""driver"", ""bios"" }",-,TBD
+,Underscan,"""underscan""",ENUM,"{ ""off"", ""on"", ""auto"" }",Connector,TBD
+,,"""underscan hborder""",RANGE,"Min=0, Max=128",Connector,TBD
+,,"""underscan vborder""",RANGE,"Min=0, Max=128",Connector,TBD
+,Audio,“audio”,ENUM,"{ ""off"", ""on"", ""auto"" }",Connector,TBD
+,FMT Dithering,“dither”,ENUM,"{ ""off"", ""on"" }",Connector,TBD
+,,"""colorkey""",RANGE,"Min=0, Max=0x01ffffff",Plane,TBD