X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=arch%2Fs390%2Fkernel%2Fstacktrace.c;h=85e46a5d0e0801d9880987cd2595a06391231401;hb=d67c6f869c0a7f275689855161c93d714197e052;hp=515ff9011dd742e33a5bfb54c4d55d99818937d9;hpb=a9deecba19b8f384d97f82c75379da48bccb2588;p=linux-2.6-omap-h63xx.git

diff --git a/arch/s390/kernel/stacktrace.c b/arch/s390/kernel/stacktrace.c
index 515ff9011dd..85e46a5d0e0 100644
--- a/arch/s390/kernel/stacktrace.c
+++ b/arch/s390/kernel/stacktrace.c
@@ -12,10 +12,10 @@
 #include <linux/kallsyms.h>
 
 static unsigned long save_context_stack(struct stack_trace *trace,
-					unsigned int *skip,
 					unsigned long sp,
 					unsigned long low,
-					unsigned long high)
+					unsigned long high,
+					int savesched)
 {
 	struct stack_frame *sf;
 	struct pt_regs *regs;
@@ -28,10 +28,10 @@ static unsigned long save_context_stack(struct stack_trace *trace,
 		sf = (struct stack_frame *)sp;
 		while(1) {
 			addr = sf->gprs[8] & PSW_ADDR_INSN;
-			if (!(*skip))
+			if (!trace->skip)
 				trace->entries[trace->nr_entries++] = addr;
 			else
-				(*skip)--;
+				trace->skip--;
 			if (trace->nr_entries >= trace->max_entries)
 				return sp;
 			low = sp;
@@ -48,10 +48,12 @@ static unsigned long save_context_stack(struct stack_trace *trace,
 			return sp;
 		regs = (struct pt_regs *)sp;
 		addr = regs->psw.addr & PSW_ADDR_INSN;
-		if (!(*skip))
-			trace->entries[trace->nr_entries++] = addr;
-		else
-			(*skip)--;
+		if (savesched || !in_sched_functions(addr)) {
+			if (!trace->skip)
+				trace->entries[trace->nr_entries++] = addr;
+			else
+				trace->skip--;
+		}
 		if (trace->nr_entries >= trace->max_entries)
 			return sp;
 		low = sp;
@@ -65,20 +67,29 @@ void save_stack_trace(struct stack_trace *trace)
 	unsigned long orig_sp, new_sp;
 
 	orig_sp = sp & PSW_ADDR_INSN;
-
-	new_sp = save_context_stack(trace, &trace->skip, orig_sp,
-				S390_lowcore.panic_stack - PAGE_SIZE,
-				S390_lowcore.panic_stack);
+	new_sp = save_context_stack(trace, orig_sp,
+				    S390_lowcore.panic_stack - PAGE_SIZE,
+				    S390_lowcore.panic_stack, 1);
 	if (new_sp != orig_sp)
 		return;
-	new_sp = save_context_stack(trace, &trace->skip, new_sp,
-				S390_lowcore.async_stack - ASYNC_SIZE,
-				S390_lowcore.async_stack);
+	new_sp = save_context_stack(trace, new_sp,
+				    S390_lowcore.async_stack - ASYNC_SIZE,
+				    S390_lowcore.async_stack, 1);
 	if (new_sp != orig_sp)
 		return;
-
-	save_context_stack(trace, &trace->skip, new_sp,
+	save_context_stack(trace, new_sp,
 			   S390_lowcore.thread_info,
-			   S390_lowcore.thread_info + THREAD_SIZE);
-	return;
+			   S390_lowcore.thread_info + THREAD_SIZE, 1);
+}
+
+void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
+{
+	unsigned long sp, low, high;
+
+	sp = tsk->thread.ksp & PSW_ADDR_INSN;
+	low = (unsigned long) task_stack_page(tsk);
+	high = (unsigned long) task_pt_regs(tsk);
+	save_context_stack(trace, sp, low, high, 0);
+	if (trace->nr_entries < trace->max_entries)
+		trace->entries[trace->nr_entries++] = ULONG_MAX;
 }