Kernel: Expose info about source devices of mounts in /proc/df

Author: https://github.com/bugaevc
Commit: fde8f7f538
Pull-request: https://github.com/SerenityOS/serenity/pull/456
Reviewed-by: https://github.com/awesomekling ✅

Kernel/Devices/Device.cpp

@@ -14,7 +14,12 @@ Device::~Device()
     VFS::the().unregister_device({}, *this);
 }
 
-String Device::absolute_path(const FileDescription&) const
+String Device::absolute_path() const
 {
     return String::format("device:%u,%u (%s)", m_major, m_minor, class_name());
 }
+
+String Device::absolute_path(const FileDescription&) const
+{
+    return absolute_path();
+}