From: Tomas Hruby <tom@minix3.org>
Date: Tue, 15 Sep 2009 09:58:46 +0000 (+0000)
Subject: iskernelp() and isuserp() test pointers
X-Git-Tag: v3.1.5~145
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zpipe.c?a=commitdiff_plain;h=71077d122806f5a323de31cf1caa13cff8ff6e01;p=minix.git

iskernelp() and isuserp() test pointers

- we may test even not fully initialized entries, e.g. during boot
  crash

- is we know the process number we should use iskerneln
  and isusern
---

diff --git a/kernel/proc.h b/kernel/proc.h
index 28dfb1a0e..aa3752f00 100755
--- a/kernel/proc.h
+++ b/kernel/proc.h
@@ -204,9 +204,9 @@ struct proc {
 #define isokprocn(n)      ((unsigned) ((n) + NR_TASKS) < NR_PROCS + NR_TASKS)
 #define isemptyn(n)       isemptyp(proc_addr(n)) 
 #define isemptyp(p)       ((p)->p_rts_flags == SLOT_FREE)
-#define iskernelp(p)	  iskerneln((p)->p_nr)
+#define iskernelp(p)	  ((p) < BEG_USER_ADDR)
 #define iskerneln(n)	  ((n) < 0)
-#define isuserp(p)        isusern((p)->p_nr)
+#define isuserp(p)        isusern((p) >= BEG_USER_ADDR)
 #define isusern(n)        ((n) >= 0)
 
 /* The process table and pointers to process table slots. The pointers allow