auto merge of #11029 : huonw/rust/rm-vec-as-buf, r=cmr

For `str.as_mut_buf`, un-closure-ification is achieved by outright removal (see commit message). The others are replaced by `.as_ptr`, `.as_mut_ptr` and `.len`

1 files changed, 5 insertions, 7 deletions

diff --git a/src/libstd/rt/sched.rs b/src/libstd/rt/sched.rs
index ac3aeb5a4bb..cd21cdeb711 100644
--- a/src/libstd/rt/sched.rs
+++ b/src/libstd/rt/sched.rs
@@ -914,13 +914,11 @@ fn new_sched_rng() -> XorShiftRng {
     let mut seeds = [0u32, .. 4];
     let size = mem::size_of_val(&seeds);
     loop {
-        let nbytes = seeds.as_mut_buf(|buf, _| {
-            unsafe {
-                libc::read(fd,
-                           buf as *mut libc::c_void,
-                           size as libc::size_t)
-            }
-        });
+        let nbytes = unsafe {
+            libc::read(fd,
+                       seeds.as_mut_ptr() as *mut libc::c_void,
+                       size as libc::size_t)
+        };
         rtassert!(nbytes as uint == size);
 
         if !seeds.iter().all(|x| *x == 0) {