diff --git a/Cargo.lock b/Cargo.lock
index 67719ec..786e057 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -39,7 +39,7 @@ name = "backtrace-sys"
 version = "0.1.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -72,7 +72,7 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.0.34"
+version = "1.0.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -173,14 +173,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "kernel"
-version = "0.1.53"
+version = "0.1.54"
 dependencies = [
  "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "clippy 0.0.209 (registry+https://github.com/rust-lang/crates.io-index)",
  "goblin 0.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "linked_list_allocator 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "raw-cpuid 4.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_syscall 0.1.53",
+ "redox_syscall 0.1.54",
  "rustc-demangle 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab_allocator 0.3.1",
  "spin 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -269,7 +269,7 @@ version = "4.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "cc 1.0.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -277,7 +277,7 @@ dependencies = [
 
 [[package]]
 name = "redox_syscall"
-version = "0.1.53"
+version = "0.1.54"
 
 [[package]]
 name = "regex"
@@ -497,7 +497,7 @@ dependencies = [
 "checksum bitflags 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4efd02e230a02e18f92fc2735f44597385ed02ad8f831e7c1c1156ee5e1ab3a5"
 "checksum bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "228047a76f468627ca71776ecdebd732a3423081fcf5125585bcd7c49886ce12"
 "checksum cargo_metadata 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)" = "1efca0b863ca03ed4c109fb1c55e0bc4bbeb221d3e103d86251046b06a526bd0"
-"checksum cc 1.0.34 (registry+https://github.com/rust-lang/crates.io-index)" = "30f813bf45048a18eda9190fd3c6b78644146056740c43172a5a3699118588fd"
+"checksum cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)" = "5e5f3fee5eeb60324c2781f1e41286bdee933850fff9b3c672587fed5ec58c83"
 "checksum cfg-if 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "11d43355396e872eefb45ce6342e4374ed7bc2b3a502d1b28e36d6e23c05d1f4"
 "checksum clippy 0.0.209 (registry+https://github.com/rust-lang/crates.io-index)" = "fe56cba96f8d67cd3af996bd2c61fbfea263cc555db9180dc1f7413418454c7d"
 "checksum clippy_lints 0.0.209 (registry+https://github.com/rust-lang/crates.io-index)" = "891679ac4d0890425ce9aa4db6ab7c05a60506048fb5e0fc2ae2eeaeb02626e8"
diff --git a/Cargo.toml b/Cargo.toml
index 0ef936c..378a4c7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "kernel"
-version = "0.1.53"
+version = "0.1.54"
 build = "build.rs"
 
 [lib]
diff --git a/src/syscall/driver.rs b/src/syscall/driver.rs
index 0529bc9..cef064c 100644
--- a/src/syscall/driver.rs
+++ b/src/syscall/driver.rs
@@ -5,7 +5,7 @@ use paging::entry::EntryFlags;
 use context;
 use context::memory::Grant;
 use syscall::error::{Error, EFAULT, EINVAL, ENOMEM, EPERM, ESRCH, Result};
-use syscall::flag::{PHYSMAP_WRITE, PHYSMAP_WRITE_COMBINE};
+use syscall::flag::{PHYSMAP_WRITE, PHYSMAP_WRITE_COMBINE, PHYSMAP_NO_CACHE};
 
 fn enforce_root() -> Result<()> {
     let contexts = context::contexts();
@@ -73,6 +73,9 @@ pub fn inner_physmap(physical_address: usize, size: usize, flags: usize) -> Resu
         if flags & PHYSMAP_WRITE_COMBINE == PHYSMAP_WRITE_COMBINE {
             entry_flags |= EntryFlags::HUGE_PAGE;
         }
+        if flags & PHYSMAP_NO_CACHE == PHYSMAP_NO_CACHE {
+            entry_flags |= EntryFlags::NO_CACHE;
+        }
 
         let mut i = 0;
         while i < grants.len() {
diff --git a/syscall b/syscall
index a5c19c5..5cdc240 160000
--- a/syscall
+++ b/syscall
@@ -1 +1 @@
-Subproject commit a5c19c54dec6294533af99e733ced7ccac854743
+Subproject commit 5cdc240d1338b53a1d8b9f652b0cc628317f3109