[Xen-devel] [PATCH v2 02/22] mini-os: make dump_regs() work in early boot

[Juergen Gross <jgross@xxxxxxxx>]

dump_regs() will result in page fault in early boot as there is no
current thread pointer. Handle this case.

Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Reviewed-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>
---
 arch/x86/traps.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/traps.c b/arch/x86/traps.c
index 6353718..307a14c 100644
--- a/arch/x86/traps.c
+++ b/arch/x86/traps.c
@@ -32,7 +32,7 @@ void machine_check(void);
 
 void dump_regs(struct pt_regs *regs)
 {
-    printk("Thread: %s\n", current->name);
+    printk("Thread: %s\n", current ? current->name : "*NONE*");
 #ifdef __i386__    
     printk("EIP: %lx, EFLAGS %lx.\n", regs->eip, regs->eflags);
     printk("EBX: %08lx ECX: %08lx EDX: %08lx\n",
-- 
2.6.6


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