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.txt

@@ -2895,6 +2895,7 @@ SOL_X25
 SOMAXCONN
 SO_BINDTODEVICE
 SO_BUSY_POLL
+SO_BUSY_POLL_BUDGET
 SO_DOMAIN
 SO_EE_OFFENDER
 SO_EE_ORIGIN_ICMP
@@ -2914,6 +2915,7 @@ SO_PASSSEC
 SO_PEEK_OFF
 SO_PEERCRED
 SO_PEERSEC
+SO_PREFER_BUSY_POLL
 SO_RCVBUFFORCE
 SO_REUSEPORT
 SO_RXQ_OVFL

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;
@@ -112,8 +117,8 @@ cfg_if! {
         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(