try to use cp only for curproc[cpu()]

1 files changed, 9 insertions, 9 deletions

diff --git a/syscall.c b/syscall.c
index b44a7a9..adc2b58 100644
--- a/syscall.c
+++ b/syscall.c
@@ -37,15 +37,15 @@ fetchint(struct proc *p, uint addr, int *ip)
 int
 fetchstr(struct proc *p, uint addr, char **pp)
 {
-  char *cp, *ep;
+  char *s, *ep;
 
   if(addr >= p->sz)
     return -1;
   *pp = p->mem + addr;
   ep = p->mem + p->sz;
-  for(cp = *pp; cp < ep; cp++)
-    if(*cp == 0)
-      return cp - *pp;
+  for(s = *pp; s < ep; s++)
+    if(*s == 0)
+      return s - *pp;
   return -1;
 }
 
@@ -53,9 +53,9 @@ fetchstr(struct proc *p, uint addr, char **pp)
 int
 argint(int argno, int *ip)
 {
-  struct proc *p = curproc[cpu()];
+  struct proc *cp = curproc[cpu()];
 
-  return fetchint(p, p->tf->esp + 4 + 4*argno, ip);
+  return fetchint(cp, cp->tf->esp + 4 + 4*argno, ip);
 }
 
 // Fetch the nth word-sized system call argument as a pointer
@@ -65,13 +65,13 @@ int
 argptr(int argno, char **pp, int size)
 {
   int i;
-  struct proc *p = curproc[cpu()];
+  struct proc *cp = curproc[cpu()];
   
   if(argint(argno, &i) < 0)
     return -1;
-  if((uint)i >= p->sz || (uint)i+size >= p->sz)
+  if((uint)i >= cp->sz || (uint)i+size >= cp->sz)
     return -1;
-  *pp = p->mem + i;
+  *pp = cp->mem + i;
   return 0;
 }