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Vincent Donnefort ef3d50e884 ring-buffer: Clean ring_buffer_poll_wait() error return commit `66bbea9ed6` upstream. The return type for ring_buffer_poll_wait() is __poll_t. This is behind the scenes an unsigned where we can set event bits. In case of a non-allocated CPU, we do return instead -EINVAL (0xffffffea). Lucky us, this ends up setting few error bits (EPOLLERR \| EPOLLHUP \| EPOLLNVAL), so user-space at least is aware something went wrong. Nonetheless, this is an incorrect code. Replace that -EINVAL with a proper EPOLLERR to clean that output. As this doesn't change the behaviour, there's no need to treat this change as a bug fix. Link: https://lore.kernel.org/linux-trace-kernel/20240131140955.3322792-1-vdonnefort@google.com Cc: stable@vger.kernel.org Fixes: `6721cb6002` ("ring-buffer: Do not poll non allocated cpu buffers") Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-02-23 09:12:42 +01:00
arch	um: Fix adding '-no-pie' for clang	2024-02-23 09:12:38 +01:00
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drivers	hv_netvsc: Fix race condition between netvsc_probe and netvsc_remove	2024-02-23 09:12:42 +01:00
fs	ksmbd: free aux buffer if ksmbd_iov_pin_rsp_read fails	2024-02-23 09:12:41 +01:00
include	iio: imu: adis: ensure proper DMA alignment	2024-02-23 09:12:40 +01:00
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kernel	ring-buffer: Clean ring_buffer_poll_wait() error return	2024-02-23 09:12:42 +01:00
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net	xfrm: Remove inner/outer modes from input path	2024-02-23 09:12:41 +01:00
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scripts	modpost: Add '.ltext' and '.ltext.*' to TEXT_SECTIONS	2024-02-23 09:12:38 +01:00
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sound	ALSA: hda/realtek: fix mute/micmute LEDs for HP ZBook Power	2024-02-23 09:12:39 +01:00
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README

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 Restructured Text 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.