arch: Rename Linux namespace as linux

As part of recent decisions regarding namespace
naming conventions, all namespaces will be changed
to snake case.

::Linux became ::linux.

Change-Id: I3c34790530464b42ded795ce5b78719387a79a00
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/45418
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
Reviewed-by: Hoa Nguyen <hoanguyen@ucdavis.edu>

src/kern/linux/events.cc

@@ -51,7 +51,8 @@
 #include "sim/core.hh"
 #include "sim/system.hh"
 
-namespace Linux
+GEM5_DEPRECATED_NAMESPACE(Linux, linux);
+namespace linux
 {
 
 void

src/kern/linux/events.hh

@@ -44,6 +44,7 @@
 #include <functional>
 #include <string>
 
+#include "base/compiler.hh"
 #include "base/trace.hh"
 #include "debug/DebugPrintf.hh"
 #include "kern/linux/printk.hh"
@@ -53,7 +54,8 @@
 
 class ThreadContext;
 
-namespace Linux
+GEM5_DEPRECATED_NAMESPACE(Linux, linux);
+namespace linux
 {
 
 template <typename ABI, typename Base>
@@ -82,7 +84,7 @@ class DebugPrintk : public Base
  * Dump the guest kernel's dmesg buffer to a file in gem5's output
  * directory and print a warning.
  *
- * @warn This event uses Linux::dumpDmesg() and comes with the same
+ * @warn This event uses linux::dumpDmesg() and comes with the same
  * limitations. Most importantly, the kernel's address mappings must
  * be available to the translating proxy.
  */
@@ -103,7 +105,7 @@ class DmesgDump : public PCEvent
  * Dump the guest kernel's dmesg buffer to a file in gem5's output
  * directory and panic.
  *
- * @warn This event uses Linux::dumpDmesg() and comes with the same
+ * @warn This event uses linux::dumpDmesg() and comes with the same
  * limitations. Most importantly, the kernel's address mappings must
  * be available to the translating proxy.
  */
@@ -167,6 +169,6 @@ class SkipUDelay : public Base
     }
 };
 
-} // namespace Linux
+} // namespace linux
 
 #endif // __KERN_LINUX_EVENTS_HH__

src/kern/linux/helpers.cc

@@ -90,7 +90,7 @@ dumpDmesgEntry(const uint8_t *base, const uint8_t *end, const ByteOrder bo,
 }
 
 void
-Linux::dumpDmesg(ThreadContext *tc, std::ostream &os)
+linux::dumpDmesg(ThreadContext *tc, std::ostream &os)
 {
     System *system = tc->getSystemPtr();
     const ByteOrder bo = system->getGuestByteOrder();

src/kern/linux/helpers.hh

@@ -40,9 +40,13 @@
 
 #include <ostream>
 
+#include "base/compiler.hh"
+
 class ThreadContext;
 
-namespace Linux {
+GEM5_DEPRECATED_NAMESPACE(Linux, linux);
+namespace linux
+{
 
 /**
  * Dump Linux's dmesg log buffer to the an output stream.
@@ -52,6 +56,6 @@ namespace Linux {
  */
 void dumpDmesg(ThreadContext *tc, std::ostream &os);
 
-} // namespace Linux
+} // namespace linux
 
 #endif // __KERN_LINUX_HELPERS_HH__

src/kern/linux/printk.cc

@@ -38,7 +38,8 @@
 #include "cpu/thread_context.hh"
 #include "mem/port_proxy.hh"
 
-namespace Linux
+GEM5_DEPRECATED_NAMESPACE(Linux, linux);
+namespace linux
 {
 
 int
@@ -248,4 +249,4 @@ printk(std::string &str, ThreadContext *tc, Addr format_ptr,
     return str.length();
 }
 
-} // namespace Linux
+} // namespace linux

src/kern/linux/printk.hh

@@ -31,10 +31,12 @@
 
 #include <string>
 
+#include "base/compiler.hh"
 #include "base/types.hh"
 #include "sim/guest_abi.hh"
 
-namespace Linux
+GEM5_DEPRECATED_NAMESPACE(Linux, linux);
+namespace linux
 {
 
 using PrintkVarArgs =
@@ -42,6 +44,6 @@ using PrintkVarArgs =
 int printk(std::string &out, ThreadContext *tc, Addr format_ptr,
            PrintkVarArgs args);
 
-} // namespace Linux
+} // namespace linux
 
 #endif // __KERN_LINUX_PRINTK_HH__