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Commit d6ea68d

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Fix punctuation and phrasing
This commit addresses several minor grammatical and punctuation issues throughout the document to improve readability. Signed-off-by: Chia-Hao Chiu <jordan871130@gmail.com>
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‎lkmpg.tex

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@@ -160,7 +160,7 @@ \subsection{Before We Begin}
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Variances exist among individuals' systems, and distinct personal approaches are evident.
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The achievement of successful compilation and loading of the inaugural ``hello world'' program may,
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at times, present challenges.
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It is reassuring to note that overcoming the initial obstacle in the first attempt paves the way for subsequent endeavors to proceed seamlessly.
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It is reassuring to note that overcoming the initial obstacle on the first attempt paves the way for subsequent endeavors to proceed seamlessly.
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\begin{enumerate}
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\item Modversioning.
@@ -208,7 +208,7 @@ \section{Headers}
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apt-cache search linux-headers-`uname -r`
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\end{codebash}
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The following command provides information on the available kernel header files.
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The following command provides information about the available kernel header files.
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Then, for example:
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\begin{codebash}
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sudo apt-get install linux-headers-`uname -r`
@@ -278,7 +278,7 @@ \subsection{The Simplest Module}
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This is because some environment variables are specified by the security policy and cannot be inherited.
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The default security policy is \verb|sudoers|.
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In the \verb|sudoers| security policy, \verb|env_reset| is enabled by default, which restricts environment variables.
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Specifically, path variables are not retained from the user environment; they are set to default values (for more information see: \href{https://www.sudo.ws/docs/man/sudoers.man/}{sudoers manual}).
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Specifically, path variables are not retained from the user environment; they are set to default values (for more information, see: \href{https://www.sudo.ws/docs/man/sudoers.man/}{sudoers manual}).
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You can see the environment variable settings by:
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\begin{verbatim}
@@ -1437,7 +1437,7 @@ \section{System Calls}
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Then, you are mostly on your own.
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Notice that this example has been unavailable since Linux v6.9.
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Specifically after this \href{https://github.com/torvalds/linux/commit/1e3ad78334a69b36e107232e337f9d693dcc9df2#diff-4a16bf89a09b4f49669a30d54540f0b936ea0224dc6ee9edfa7700deb16c3e11R52}{commit}, due to the system call table changing the implementation from an indirect function call table to a switch statement for security issues, such as Branch History Injection (BHI) attack.
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Specifically, after this \href{https://github.com/torvalds/linux/commit/1e3ad78334a69b36e107232e337f9d693dcc9df2#diff-4a16bf89a09b4f49669a30d54540f0b936ea0224dc6ee9edfa7700deb16c3e11R52}{commit}, due to the system call table changing the implementation from an indirect function call table to a switch statement for security issues, such as Branch History Injection (BHI) attack.
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See more information \href{https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2060909}{here}.
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Should one choose not to use a virtual machine, kernel programming can become risky.
@@ -1845,7 +1845,7 @@ \subsection{Flashing keyboard LEDs}
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Thus, it is better to use a unique prototype to separate from the cluster that takes an \cpp|unsigned long| argument.
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The timer callback should be passed a pointer to the \cpp|timer_list| structure rather than an \cpp|unsigned long| argument.
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Then, it wraps all the information the callback needs, including the \cpp|timer_list| structure, into a larger structure, and it can use the \cpp|container_of| macro instead of the \cpp|unsigned long| value.
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For more information see: \href{https://lwn.net/Articles/735887/}{Improving the kernel timers API}.
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For more information, see: \href{https://lwn.net/Articles/735887/}{Improving the kernel timers API}.
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Before Linux v4.14, \cpp|setup_timer| was used to initialize the timer and the \cpp|timer_list| structure looked like:
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\begin{code}

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