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![]() itimer_delete() is invoked during do_exit(). At this point it is the last thread in the group dying and doing the clean up. Since it is the last thread in the group, there can not be any other task attempting to lock the itimer which means the NULL assignment (which avoids lookups in __lock_timer()) is not required. The assignment and comment was copied in commit 0e568881178ff ("[PATCH] fix posix-timers to have proper per-process scope") from sys_timer_delete() which was/is the syscall interface and requires the assignment. Remove the superfluous ->it_signal = NULL assignment. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20190621143643.25649-2-bigeasy@linutronix.de |
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kernel | ||
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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.