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91ca180dbd
In preparation for removing the task parameter from force_sig_fault introduce force_sig_fault_to_task and use it for the two cases where it matters. On mips force_fcr31_sig calls force_sig_fault and is called on either the current task, or a task that is suspended and is being switched to by the scheduler. This is safe because the task being switched to by the scheduler is guaranteed to be suspended. This ensures that task->sighand is stable while the signal is delivered to it. On parisc user_enable_single_step calls force_sig_fault and is in turn called by ptrace_request. The function ptrace_request always calls user_enable_single_step on a child that is stopped for tracing. The child being traced and not reaped ensures that child->sighand is not NULL, and that the child will not change child->sighand. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> |
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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.