Read curproc from cpu structure, but be careful because after a schedule event

myproc() points to a different thread.

   myproc();
   sched();
   myproc();  // this proc maybe different than the one before sched

Thus, in a function that operates on one thread better to retrieve the
current process once at the start of the function.

1 files changed, 3 insertions, 0 deletions

diff --git a/proc.h b/proc.h
index 38a2d32..7047d54 100644
--- a/proc.h
+++ b/proc.h
@@ -30,12 +30,14 @@ mycpu(void) {
   return cpu;
 }
 
+#if 0
 static inline struct proc*
 myproc(void) {
   struct proc *proc;
   asm("movl %%gs:4, %0" : "=r"(proc));
   return proc;
 }
+#endif
 
 
 //PAGEBREAK: 17
@@ -74,6 +76,7 @@ struct proc {
   struct file *ofile[NOFILE];  // Open files
   struct inode *cwd;           // Current directory
   char name[16];               // Process name (debugging)
+  struct cpu *cpu;             // If running, which cpu.
 };
 
 // Process memory is laid out contiguously, low addresses first: