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91a7f802d1
This function can not be called under IRQ, thus it is only available
while in SEC("syscall").
For consistency, this function requires a HID-BPF context to work with,
and so we also provide a helper to create one based on the HID unique
ID.
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
--
changes in v12:
- variable dereferenced before check 'ctx'
|Reported-by: kernel test robot <lkp@intel.com>
|Reported-by: Dan Carpenter <error27@gmail.com>
no changes in v11
no changes in v10
changes in v9:
- fixed kfunc declaration aaccording to latest upstream changes
no changes in v8
changes in v7:
- hid_bpf_allocate_context: remove unused variable
- ensures buf is not NULL
changes in v6:
- rename parameter size into buf__sz to teach the verifier about
the actual buffer size used by the call
- remove the allocated data in the user created context, it's not used
new-ish in v5
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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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 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.