Merge tag 'locking-futex-2026-08-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull futex updates from Thomas Gleixner:

- Improvements to various futex self tests:

- Conversion

Merge tag 'locking-futex-2026-08-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull futex updates from Thomas Gleixner:

- Improvements to various futex self tests:

- Conversion to the selftest harness

- Provide and use thread creation and synchronization helpers to
reduce the dependency on delays, which tend to fail on loaded test
systems

- New tests for validating owner exit scenarios for robust and PI
futexes

- Runtime detect supported features and skip the tests if the kernel
has no support

- A few minor fixes

* tag 'locking-futex-2026-08-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
selftests/futex: Give circular-list nodes static storage
selftests/futex: Use thread synchronization helpers instead of usleep()
selftests/futex: Provide thread creation and synchronization helpers
selftests/futex: Dynamically skip unsupported tests
selftests/futex: Add FUTEX_LOCK_PI owner-exiting coverage
selftests/futex: Migrate robust_list to harness
selftests/futex: Migrate futex_priv_hash to harness
selftests/futex: Migrate futex_numa_mpol to harness
selftests/futex: Migrate futex_requeue_pi_signal_restart to harness
selftests/futex: Migrate futex_requeue_pi_mismatched_ops to harness
selftests/futex: Migrate futex_requeue_pi to harness
selftests/futex: Migrate futex_requeue to harness
selftests/futex: Migrate futex_wait_uninitialized_heap to harness
selftests/futex: Migrate futex_wait_private_mapped_file to harness
selftests/futex: Migrate futex_wait to harness
selftests/futex: Correct validation logic in waitv
selftests/futex: Migrate functional tests to harness
selftests/futex: Remove static keyword from 'head'
futex: Remove unnecessary NULL check before kvfree()
selftests/rseq: Replace glibc-specific __GNUC_PREREQ with portable check

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selftests/futex: Provide thread creation and synchronization helpers

There are timing issues in the use of threads in some selftests for futexes
as the tests rely on timed waits to ensure that the o

selftests/futex: Provide thread creation and synchronization helpers

There are timing issues in the use of threads in some selftests for futexes
as the tests rely on timed waits to ensure that the other test thread[s]
reached the lock wait function in the kernel.

That "works" on halfways idle systems, but fails under load which results
in tests failing.

Provide a set of helper functions to create test threads and to wait for
them to reach the lock wait by monitoring /proc/$PID/wchan.

[ tglx: Fixup coding style, move the timeout into the helper, adapt to test
harness changes and massage change log ]

Signed-off-by: Yuwen Chen <ywen.chen@foxmail.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/tencent_4C90BE98BBC48B38B9FBC6A95C45CF49F309@qq.com

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selftests/futex: Add FUTEX_LOCK_PI owner-exiting coverage

The futex functional tests cover FUTEX_LOCK_PI timeout semantics
(futex_wait_timeout.c) and robust-list owner death (robust_list.c), but
not

selftests/futex: Add FUTEX_LOCK_PI owner-exiting coverage

The futex functional tests cover FUTEX_LOCK_PI timeout semantics
(futex_wait_timeout.c) and robust-list owner death (robust_list.c), but
nothing exercises a non-robust PI owner exiting while holding the lock,
nor the basic ownership / EDEADLK / unlock word semantics of
FUTEX_LOCK_PI.

Add futex_lock_pi_exiting.c with three tests:

- lock_unlock_basic: an uncontended FUTEX_LOCK_PI puts the owner TID in
the futex word, a recursive lock by the owner returns EDEADLK, and
FUTEX_UNLOCK_PI clears the word.

- owner_dies_with_blocked_waiter: a thread acquires a PI futex and exits
while holding it; a blocked FUTEX_LOCK_PI waiter must come out cleanly
(0, EOWNERDEAD or ESRCH) and own the lock when it acquires.

- stress_owner_exits: repeatedly drive the same exiting-owner path.

The exiting-owner retry path is where commit 210d36d892de ("futex: Clear
stale exiting pointer in futex_lock_pi() retry path") fixed a stale task
pointer that tripped WARN_ON_ONCE() in wait_for_owner_exiting(). That
warning does not change the syscall return value, so this test does not
assert on it directly; the stress loop exists to give a kernel booted
with panic_on_warn=1 (as fuzzers and CI commonly run) a chance to trip
on it.

Signed-off-by: Valery Borovsky <vebohr@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260607183249.246037-1-vebohr@gmail.com

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Merge branch 'next' into for-linus

Prepare input updates for 7.2 merge window.

Merge tag 'v7.1-rc6' into next

Sync up with mainline to pull in a fix to IMS PCU driver and other
enhancements.

Merge branch '20260507-ubwc-rework-v4-4-c19593d20c1d@oss.qualcomm.com' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into HEAD

Merge the branch with the soc/qcom changes, required fo

Merge branch '20260507-ubwc-rework-v4-4-c19593d20c1d@oss.qualcomm.com' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into HEAD

Merge the branch with the soc/qcom changes, required for the next UBWC
patches.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

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Merge branch 'linus' into timers/clocksource

... to bring it up to date for new changes.

Merge drm/drm-next into drm-intel-next

Some Display Port Adaptive Sync depends on drm work.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Merge drm/drm-next into drm-intel-gt-next

Backmerging to pull in commit 5401b9adebc9 ("i915: don't use
a vma that didn't match the context VM") to revert it.

Signed-off-by: Joonas Lahtinen <joonas.

Merge drm/drm-next into drm-intel-gt-next

Backmerging to pull in commit 5401b9adebc9 ("i915: don't use
a vma that didn't match the context VM") to revert it.

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

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Merge drm/drm-next into drm-xe-next

Bringing in recent display changes.

Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

Merge drm/drm-next into drm-misc-next

Getting fixes and updates from v7.1-rc1.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Merge tag 'v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into gpio/for-next

Linux 7.1-rc1

Merge drm/drm-fixes into drm-misc-fixes

Getting fixes and updates from v7.1-rc1.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Merge branch 'next' into for-linus

Prepare input updates for 7.1 merge window.

Merge tag 'v7.0-rc3' into next

Sync up with the mainline to brig up the latest changes, specifically
changes to ALPS driver.

Merge tag 'locking_futex_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull futex selftest updates from Borislav Petkov:

- Correct the version guard for the futex_numa_mpo

Merge tag 'locking_futex_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull futex selftest updates from Borislav Petkov:

- Correct the version guard for the futex_numa_mpol test to require
libnuma 2.0.18 instead of 2.0.16, which is the version that actually
introduced numa_set_mempolicy_home_node() used by the test

- Allow the futex_numa_mpol selftest to build and run on systems
without libnuma installed with affected test gracefully being skipped
instead of failing to compile

- Use the proper assertion macros so that individual sub-test failures
are correctly propagated and the test suite reports failure when
something goes wrong

* tag 'locking_futex_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
selftests/futex: Bump up libnuma version check
selftests/futex: Conditionally include libnuma support
selftests/futex: Fix incorrect result reporting of futex_requeue test item

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selftests/futex: Bump up libnuma version check

numa_set_mempolicy_home_node() was introduced in libnuma 2.0.18, not
2.0.16, via:
https://github.com/numactl/numactl/commit/8f2ffc89654c

Signed-off-b

selftests/futex: Bump up libnuma version check

numa_set_mempolicy_home_node() was introduced in libnuma 2.0.18, not
2.0.16, via:
https://github.com/numactl/numactl/commit/8f2ffc89654c

Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://patch.msgid.link/20260306182215.2088991-1-dave@stgolabs.net

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selftests/futex: Conditionally include libnuma support

Use LIBNUMA_TEST to conditionally add -lnuma to LDLIBS.
Guard numa header includes with #ifdef LIBNUMA_VER_SUFFICIENT
to allow compilation with

selftests/futex: Conditionally include libnuma support

Use LIBNUMA_TEST to conditionally add -lnuma to LDLIBS.
Guard numa header includes with #ifdef LIBNUMA_VER_SUFFICIENT
to allow compilation without libnuma installed.

Co-developed-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Nylon Chen <nylon.chen@sifive.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260301-20260128_nylon_chen_sifive_com-v3-1-995ab4cc71aa@sifive.com

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Merge branch 'for-6.20/sony' into for-linus

- Support for Rock band 4 PS4 and PS5 guitars (Rosalie Wanders)

Merge tag 'v6.19-rc1' into msm-next

Merge Linux 6.19-rc1 in order to catch up with other changes (e.g. UBWC
config database defining UBWC_6).

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.q

Merge tag 'v6.19-rc1' into msm-next

Merge Linux 6.19-rc1 in order to catch up with other changes (e.g. UBWC
config database defining UBWC_6).

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

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Merge drm/drm-next into drm-xe-next

Backmerging to bring in 6.19-rc1. An important upstream bugfix and
to help unblock PTL CI.

Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf after 6.19-rc1

Cross-merge BPF and other fixes after downstream PR.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>

Merge drm/drm-next into drm-intel-next

Sync-up some display code needed for Async flips refactor.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Merge drm/drm-next into drm-misc-next

Let's kickstart the v6.20 (7.0?) release cycle.

Signed-off-by: Maxime Ripard <mripard@kernel.org>

Merge tag 'v6.18' into next

Sync up with the mainline to bring in the latest APIs.