Rollup merge of #56708 - oli-obk:stability_internal_const_fn, r=alexcrichton

Remove some unnecessary feature gates

fixes #56585

cc @jethrogb

Author: kennytm

src/libstd/io/lazy.rs

@@ -26,7 +26,6 @@ const fn done<T>() -> *mut Arc<T> { 1_usize as *mut _ }
 unsafe impl<T> Sync for Lazy<T> {}
 
 impl<T> Lazy<T> {
-    #[unstable(feature = "sys_internals", issue = "0")] // FIXME: min_const_fn
     pub const fn new() -> Lazy<T> {
         Lazy {
             lock: Mutex::new(),

src/libstd/lib.rs

@@ -271,6 +271,7 @@
 #![feature(libc)]
 #![feature(link_args)]
 #![feature(linkage)]
+#![cfg_attr(not(stage0), feature(min_const_unsafe_fn))]
 #![feature(needs_panic_runtime)]
 #![feature(never_type)]
 #![feature(nll)]

src/libstd/sys/sgx/abi/mem.rs

@@ -34,13 +34,6 @@ fn image_base() -> u64 {
     base
 }
 
-pub fn is_enclave_range(p: *const u8, len: usize) -> bool {
-    let start=p as u64;
-    let end=start + (len as u64);
-    start >= image_base() &&
-        end <= image_base() + (unsafe { ENCLAVE_SIZE } as u64) // unsafe ok: link-time constant
-}
-
 pub fn is_user_range(p: *const u8, len: usize) -> bool {
     let start=p as u64;
     let end=start + (len as u64);

src/libstd/sys/sgx/abi/usercalls/mod.rs

@@ -33,14 +33,6 @@ pub fn read(fd: Fd, buf: &mut [u8]) -> IoResult<usize> {
     }
 }
 
-pub fn read_alloc(fd: Fd) -> IoResult<Vec<u8>> {
-    unsafe {
-        let mut userbuf = alloc::User::<ByteBuffer>::uninitialized();
-        raw::read_alloc(fd, userbuf.as_raw_mut_ptr()).from_sgx_result()?;
-        Ok(copy_user_buffer(&userbuf))
-    }
-}
-
 pub fn write(fd: Fd, buf: &[u8]) -> IoResult<usize> {
     unsafe {
         let userbuf = alloc::User::new_from_enclave(buf);

src/libstd/sys/sgx/condvar.rs

@@ -18,7 +18,6 @@ pub struct Condvar {
 }
 
 impl Condvar {
-    #[unstable(feature = "sgx_internals", issue = "0")] // FIXME: min_const_fn
     pub const fn new() -> Condvar {
         Condvar { inner: SpinMutex::new(WaitVariable::new(())) }
     }

src/libstd/sys/sgx/mutex.rs

@@ -20,7 +20,6 @@ pub struct Mutex {
 
 // Implementation according to “Operating Systems: Three Easy Pieces”, chapter 28
 impl Mutex {
-    #[unstable(feature = "sgx_internals", issue = "0")] // FIXME: min_const_fn
     pub const fn new() -> Mutex {
         Mutex { inner: SpinMutex::new(WaitVariable::new(false)) }
     }
@@ -79,7 +78,6 @@ pub struct ReentrantMutex {
 }
 
 impl ReentrantMutex {
-    #[unstable(feature = "sgx_internals", issue = "0")] // FIXME: min_const_fn
     pub const fn uninitialized() -> ReentrantMutex {
         ReentrantMutex {
             inner: SpinMutex::new(WaitVariable::new(ReentrantLock { owner: None, count: 0 }))

src/libstd/sys/sgx/rwlock.rs

@@ -21,7 +21,6 @@ pub struct RWLock {
 //unsafe impl Sync for RWLock {} // FIXME
 
 impl RWLock {
-    #[unstable(feature = "sgx_internals", issue = "0")] // FIXME: min_const_fn
     pub const fn new() -> RWLock {
         RWLock {
             readers: SpinMutex::new(WaitVariable::new(None)),

src/libstd/sys/sgx/waitqueue.rs

@@ -50,7 +50,6 @@ pub struct WaitVariable<T> {
 }
 
 impl<T> WaitVariable<T> {
-    #[unstable(feature = "sgx_internals", issue = "0")] // FIXME: min_const_fn
     pub const fn new(var: T) -> Self {
         WaitVariable {
             queue: WaitQueue::new(),
@@ -137,7 +136,6 @@ impl<'a, T> Drop for WaitGuard<'a, T> {
 }
 
 impl WaitQueue {
-    #[unstable(feature = "sgx_internals", issue = "0")] // FIXME: min_const_fn
     pub const fn new() -> Self {
         WaitQueue {
             inner: UnsafeList::new()
@@ -255,7 +253,6 @@ mod unsafe_list {
     }
 
     impl<T> UnsafeList<T> {
-        #[unstable(feature = "sgx_internals", issue = "0")] // FIXME: min_const_fn
         pub const fn new() -> Self {
             unsafe {
                 UnsafeList {

src/libstd/sys_common/condvar.rs

@@ -25,7 +25,6 @@ impl Condvar {
     ///
     /// Behavior is undefined if the condition variable is moved after it is
     /// first used with any of the functions below.
-    #[unstable(feature = "sys_internals", issue = "0")] // FIXME: min_const_fn
     pub const fn new() -> Condvar { Condvar(imp::Condvar::new()) }
 
     /// Prepares the condition variable for use.

src/libstd/sys_common/mutex.rs

@@ -27,7 +27,6 @@ impl Mutex {
     /// Also, until `init` is called, behavior is undefined if this
     /// mutex is ever used reentrantly, i.e., `raw_lock` or `try_lock`
     /// are called by the thread currently holding the lock.
-    #[unstable(feature = "sys_internals", issue = "0")] // FIXME: min_const_fn
     pub const fn new() -> Mutex { Mutex(imp::Mutex::new()) }
 
     /// Prepare the mutex for use.