Ubuntu中的驱动程序文件夹在哪里？

我需要访问路径[linux-src]/drivers/usb/serial/option.c中的option.c文件。我更新我的内核版本：

代码语言：javascript运行复制 admin@sintrones-abox:~$ uname -r

5.18.14-051814-generic在文件夹/usr/src中，我仍然有旧的内核目录：

代码语言：javascript运行复制admin@sintrones-abox:/usr/src$ ls

backport-iwlwifi-8324 linux-hwe-5.4-headers-5.4.0-122

linux-headers-5.18.14-051814 Quectel_Linux_USB_Driver

linux-headers-5.4.0-122-generic我试着搜索：

代码语言：javascript运行复制admin@sintrones-abox:/usr/src$ locate -b '\serial'

/home/admin/drivers/usb/serial

/lib/modules/4.15.0-189-generic/kernel/drivers/tty/serial

/lib/modules/5.4.0-122-generic/kernel/drivers/tty/serial

/lib/modules/5.4.0-122-generic/kernel/drivers/usb/serial

/snap/core20/1518/usr/lib/python3/dist-packages/serial

/snap/core20/1581/usr/lib/python3/dist-packages/serial

/usr/lib/python3/dist-packages/serial

/usr/src/Quectel_Linux_USB_Driver/drivers/usb/serial

/usr/src/linux-headers-5.4.0-122-generic/include/config/serial

/usr/src/linux-headers-5.4.0-122-generic/include/config/ir/serial

/usr/src/linux-headers-5.4.0-122-generic/include/config/kgdb/serial

/usr/src/linux-headers-5.4.0-122-generic/include/config/snd/serial

/usr/src/linux-headers-5.4.0-122-generic/include/config/tablet/serial

/usr/src/linux-headers-5.4.0-122-generic/include/config/u/serial

/usr/src/linux-headers-5.4.0-122-generic/include/config/usb/serial

/usr/src/linux-hwe-5.4-headers-5.4.0-122/drivers/tty/serial

/usr/src/linux-hwe-5.4-headers-5.4.0-122/drivers/usb/serial

/var/lib/snapd/assertions/asserts-v0/serial但是它们中没有一个包含option.c文件。是从Linux自动生成的文件吗？我在哪里能找到它？我怎么能重新生成它呢？