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Leon Hwang says: ==================== bpf: Reject bpf_timer for PREEMPT_RT While running './test_progs -t timer' to validate the test case from "selftests/bpf: Introduce experimental bpf_in_interrupt()"[0] for PREEMPT_RT, I encountered a kernel warning: BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48 To address this, reject bpf_timer usage in the verifier when PREEMPT_RT is enabled, and skip the corresponding timer selftests. Changes: v2 -> v3: * Drop skipping test case 'timer_interrupt'. * Address comments from Alexei: * Respin targeting bpf tree. * Trim commit log. v1 -> v2: * Skip test case 'timer_interrupt'. Links: [0] https://lore.kernel.org/bpf/20250903140438.59517-1-leon.hwang@linux.dev/ ==================== Link: https://patch.msgid.link/20250910125740.52172-1-leon.hwang@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.