From: iap10@labyrinth.cl.cam.ac.uk <iap10@labyrinth.cl.cam.ac.uk>
Date: Tue, 11 May 2004 14:31:55 +0000 (+0000)
Subject: bitkeeper revision 1.895 (40a0e3db-NpIf7YeRmbz-zSrqfMekg)
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~18226
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=a8e33843ee074cd479e0cb69a7e379587cdca5bb;p=xen.git

bitkeeper revision 1.895 (40a0e3db-NpIf7YeRmbz-zSrqfMekg)

Allow non-privleged domains to use "xprintk" (HYPERVISOR_console_io) in debug=y builds of Xen.
xprintk is very useful for debugging start-of-day problems in xenolinux -- it's often
useful to have printk call it directly instead of the usual console writing stuff.
---

diff --git a/xen/drivers/char/console.c b/xen/drivers/char/console.c
index b313f59b3a..2744ed0c75 100644
--- a/xen/drivers/char/console.c
+++ b/xen/drivers/char/console.c
@@ -289,9 +289,11 @@ long do_console_io(int cmd, int count, char *buffer)
     char *kbuf;
     long  rc;
 
+#ifdef NDEBUG
     /* Only domain-0 may access the emrgency console. */
     if ( current->domain != 0 )
         return -EPERM;
+#endif
 
     switch ( cmd )
     {
diff --git a/xenolinux-2.4.26-sparse/arch/xen/drivers/console/console.c b/xenolinux-2.4.26-sparse/arch/xen/drivers/console/console.c
index e01896385b..3e7ce7866d 100644
--- a/xenolinux-2.4.26-sparse/arch/xen/drivers/console/console.c
+++ b/xenolinux-2.4.26-sparse/arch/xen/drivers/console/console.c
@@ -86,6 +86,8 @@ static void kcons_write_dom0(
             count -= rc;
             s += rc;
         }
+	else
+	    break;
     }
 }
 
@@ -124,12 +126,9 @@ asmlinkage int xprintk(const char *fmt, ...)
     va_start(args, fmt);
     printk_len = vsnprintf(printk_buf, sizeof(printk_buf), fmt, args);
     va_end(args);
-    
+
     /* Send the processed output directly to Xen. */
-    if ( start_info.flags & SIF_INITDOMAIN )
-        kcons_write_dom0(NULL, printk_buf, printk_len);
-    else
-        kcons_write(NULL, printk_buf, printk_len);
+    kcons_write_dom0(NULL, printk_buf, printk_len);
 
     return 0;
 }