Add SO_PREFER_BUSY_POLL and SO_BUSY_POLL_BUDGET

Remove the comment of these socket options.
Reference: https://elixir.bootlin.com/linux/latest/source/include/uapi/asm-generic/socket.h

Note, musl hardcodes 'SO_*' constants instead of inheriting them from the OS.

Signed-off-by: Pedro Tammela <[email protected]>

Author: tammela

libc-test/semver/linux-gnu-x86_64.txt

@@ -22,6 +22,8 @@ PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
 PTRACE_GET_RSEQ_CONFIGURATION
 PTRACE_SYSEMU
 PTRACE_SYSEMU_SINGLESTEP
+SO_BUSY_POLL_BUDGET
+SO_PREFER_BUSY_POLL
 _libc_fpstate
 flock64
 getcontext

src/unix/linux_like/linux/arch/generic/mod.rs

@@ -102,6 +102,11 @@ cfg_if! {
             target_arch = "csky",
             target_arch = "loongarch64"
         ),
+        // FIXME(musl):
+        // Musl hardcodes the SO_* constants instead
+        // of inheriting them from the kernel headers.
+        // For new constants you might need consider updating
+        // musl in the CI as well.
         not(any(target_env = "musl", target_env = "ohos"))
     ))] {
         pub const SO_TIMESTAMP_NEW: c_int = 63;
@@ -110,10 +115,10 @@ cfg_if! {
         pub const SO_RCVTIMEO_NEW: c_int = 66;
         pub const SO_SNDTIMEO_NEW: c_int = 67;
         pub const SO_DETACH_REUSEPORT_BPF: c_int = 68;
+        pub const SO_PREFER_BUSY_POLL: c_int = 69;
+        pub const SO_BUSY_POLL_BUDGET: c_int = 70;
     }
 }
-// pub const SO_PREFER_BUSY_POLL: c_int = 69;
-// pub const SO_BUSY_POLL_BUDGET: c_int = 70;
 
 cfg_if! {
     if #[cfg(any(