vsyscall avoids CPU mode switch not context switch

Thanks for this great Gitbook. Well written.

The `vsyscalls` chapter talks about `context switch` and `switching contexts`. Isn't this the actual CPU mode switch(user vs kernel mode) rather than the context switch used for switching between processes itself?

https://github.com/0xAX/linux-insides/blame/master/SysCall/linux-syscall-3.md#L27

The issue points to a specific line in the vsyscalls chapter (SysCall/linux-syscall-3.md line 27). Read the surrounding text to understand the distinction between CPU mode switch and context switch. Check the Linux kernel documentation or other sources to confirm the correct terminology. Then, propose a clarification or correction in the Gitbook's markdown file.

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