Merge tag 'io_uring-7.3-20261002' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linuxgrafted

Pull io_uring fixes from Jens Axboe:

 - Fix a task_work add use-after-free with SQPOLL.

   The sqpoll thread could pop and complete the last request while
   io_req_normal_work_add() was still looking at them after the mpscq
   push.

   Use the same approach as DEFER_TASKRUN to protect from that, holding
   an RCU read lock across the add, and have exit wait for an RCU grace
   period for SQPOLL rings as well.

 - CQE32 ring fixes: correct the free entry check for 32b CQEs, zero the
   big_cqe for aux CQEs, and only post the dummy skip CQE on CQE_MIXED
   rings

 - Mark the source filter table as COW when cloning bpf filters, so
   registering another filter on the source doesn't modify the shared
   table in place

 - Initialize the task context before running the BPF loop

 - Requeue zcrx multishot receives stopped by a local resource

 - End a TX_TIMESTAMP multishot cmd when the CQ is full (lollipopkit)

* tag 'io_uring-7.3-20261002' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
  io_uring: fix task_work add use-after-free with SQPOLL
  io_uring/cmd_net: end TX_TIMESTAMP multishot when the CQ is full
  io_uring/zcrx: requeue multishot receives stopped by a local resource
  io_uring: initialize task context before running the BPF loop
  io_uring: zero big_cqe for aux CQEs on CQE32 rings
  io_uring: fix free entry check for 32b CQEs on CQE32 rings
  io_uring: only post the dummy skip CQE on CQE_MIXED rings
  io_uring/bpf_filter: mark source as COW when cloning filters

1 files changed, 100 insertions, 0 deletions

diff --git a/Documentation/admin-guide/media/technisat.rst b/Documentation/admin-guide/media/technisat.rst
new file mode 100644
index 000000000..9eaa12366
--- /dev/null
+++ b/Documentation/admin-guide/media/technisat.rst
@@ -0,0 +1,100 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+How to set up the Technisat/B2C2 Flexcop devices
+================================================
+
+.. note::
+
+   This documentation is outdated.
+
+Author: Uwe Bugla <uwe.bugla@gmx.de> August 2009
+
+Find out what device you have
+-----------------------------
+
+Important Notice: The driver does NOT support Technisat USB 2 devices!
+
+First start your linux box with a shipped kernel:
+
+.. code-block:: none
+
+	lspci -vvv for a PCI device (lsusb -vvv for an USB device) will show you for example:
+	02:0b.0 Network controller: Techsan Electronics Co Ltd B2C2 FlexCopII DVB chip /
+	Technisat SkyStar2 DVB card (rev 02)
+
+	dmesg | grep frontend may show you for example:
+	DVB: registering frontend 0 (Conexant CX24123/CX24109)...
+
+Kernel compilation:
+-------------------
+
+If the Flexcop / Technisat is the only DVB / TV / Radio device in your box
+get rid of unnecessary modules and check this one:
+
+``Multimedia support`` => ``Customise analog and hybrid tuner modules to build``
+
+In this directory uncheck every driver which is activated there
+(except ``Simple tuner support`` for ATSC 3rd generation only -> see case 9 please).
+
+Then please activate:
+
+- Main module part:
+
+  ``Multimedia support`` => ``DVB/ATSC adapters`` => ``Technisat/B2C2 FlexcopII(b) and FlexCopIII adapters``
+
+  #) => ``Technisat/B2C2 Air/Sky/Cable2PC PCI`` (PCI card) or
+  #) => ``Technisat/B2C2 Air/Sky/Cable2PC USB`` (USB 1.1 adapter)
+     and for troubleshooting purposes:
+  #) => ``Enable debug for the B2C2 FlexCop drivers``
+
+- Frontend / Tuner / Demodulator module part:
+
+  ``Multimedia support`` => ``DVB/ATSC adapters``
+   => ``Customise the frontend modules to build`` ``Customise DVB frontends`` =>
+
+  - SkyStar DVB-S Revision 2.3:
+
+    #) => ``Zarlink VP310/MT312/ZL10313 based``
+    #) => ``Generic I2C PLL based tuners``
+
+  - SkyStar DVB-S Revision 2.6:
+
+    #) => ``ST STV0299 based``
+    #) => ``Generic I2C PLL based tuners``
+
+  - SkyStar DVB-S Revision 2.7:
+
+    #) => ``Samsung S5H1420 based``
+    #) => ``Integrant ITD1000 Zero IF tuner for DVB-S/DSS``
+    #) => ``ISL6421 SEC controller``
+
+  - SkyStar DVB-S Revision 2.8:
+
+    #) => ``Conexant CX24123 based``
+    #) => ``Conexant CX24113/CX24128 tuner for DVB-S/DSS``
+    #) => ``ISL6421 SEC controller``
+
+  - AirStar DVB-T card:
+
+    #) => ``Zarlink MT352 based``
+    #) => ``Generic I2C PLL based tuners``
+
+  - CableStar DVB-C card:
+
+    #) => ``ST STV0297 based``
+    #) => ``Generic I2C PLL based tuners``
+
+  - AirStar ATSC card 1st generation:
+
+    #) => ``Broadcom BCM3510``
+
+  - AirStar ATSC card 2nd generation:
+
+    #) => ``NxtWave Communications NXT2002/NXT2004 based``
+    #) => ``Generic I2C PLL based tuners``
+
+  - AirStar ATSC card 3rd generation:
+
+    #) => ``LG Electronics LGDT3302/LGDT3303 based``
+    #) ``Multimedia support`` => ``Customise analog and hybrid tuner modules to build`` => ``Simple tuner support``
+