diff --git a/proc.h b/proc.h
index 41860c6..7269b66 100644
--- a/proc.h
+++ b/proc.h
@@ -24,19 +24,19 @@ enum proc_state { UNUSED, EMBRYO, SLEEPING, RUNNABLE, RUNNING, ZOMBIE };
 
 // Per-process state
 struct proc {
-  char *mem;                // Start of process memory (kernel address)
-  uint sz;                  // Size of process memory (bytes)
-  char *kstack;             // Bottom of kernel stack for this process
-  enum proc_state state;    // Process state
-  int pid;                  // Process ID
-  struct proc *parent;      // Parent process
-  void *chan;               // If non-zero, sleeping on chan
-  int killed;               // If non-zero, have been killed
+  char *mem;                   // Start of process memory (kernel address)
+  uint sz;                     // Size of process memory (bytes)
+  char *kstack;                // Bottom of kernel stack for this process
+  enum proc_state state;       // Process state
+  int pid;                     // Process ID
+  struct proc *parent;         // Parent process
+  void *chan;                  // If non-zero, sleeping on chan
+  int killed;                  // If non-zero, have been killed
   struct file *ofile[NOFILE];  // Open files
-  struct inode *cwd;        // Current directory
-  struct context *context;  // Switch here to run process
-  struct trapframe *tf;     // Trap frame for current syscall
-  char name[16];            // Process name (debugging)
+  struct inode *cwd;           // Current directory
+  struct context *context;     // Switch here to run process
+  struct trapframe *tf;        // Trap frame for current syscall
+  char name[16];               // Process name (debugging)
 };
 
 // Process memory is laid out contiguously, low addresses first:
@@ -47,14 +47,14 @@ struct proc {
 
 // Per-CPU state
 struct cpu {
-  uchar apicid;               // Local APIC ID
-  struct proc *curproc;       // Process currently running.
-  struct context *context;    // Switch here to enter scheduler
-  struct taskstate ts;        // Used by x86 to find stack for interrupt
-  struct segdesc gdt[NSEGS];  // x86 global descriptor table
+  uchar apicid;                // Local APIC ID
+  struct proc *curproc;        // Process currently running.
+  struct context *context;     // Switch here to enter scheduler
+  struct taskstate ts;         // Used by x86 to find stack for interrupt
+  struct segdesc gdt[NSEGS];   // x86 global descriptor table
   volatile uint booted;        // Has the CPU started?
-  int ncli;                   // Depth of pushcli nesting.
-  int intena;                 // Were interrupts enabled before pushcli? 
+  int ncli;                    // Depth of pushcli nesting.
+  int intena;                  // Were interrupts enabled before pushcli? 
 };
 
 extern struct cpu cpus[NCPU];