linux header <linux/sysctl.h> deprecated

is linux header <linux/sysctl.h> deprecated ?

I read this on man 2 sysctl:

This system call first appeared in Linux 1.3.57. It was removed in Linux 5.5; glibc support was removed in version 2.32.

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I misunderstood this line?

How to change system parameters in future (after removal)?

>Solution :

1. It has the deprecated attribute.

[[deprecated]] int _sysctl(struct __sysctl_args *args);

2. The description states that it no longer exists on current kernels.

This system call no longer exists on current kernels!

3. "NOTES" suggest using /proc/sys interface:

Use of this system call was long discouraged: since Linux 2.6.24,
uses of this system call result in warnings in the kernel log,
and in Linux 5.5, the system call was finally removed. Use the
/proc/sys interface instead.

and the man page links to this: proc.

So yes, it is deprecated.