Re: [PATCH v4 01/15] stacktrace/x86: add function for detecting reliable stack traces

From
Miroslav Benes <mbenes@suse.cz>
Date
2017-01-27 08:48:35
Also in
linux-s390, lkml
Reply to
Josh Poimboeuf, 2017-01-19
quoted hunk ↗ jump to hunk
diff --git a/include/linux/stacktrace.h b/include/linux/stacktrace.h
index 0a34489..8e8b67b 100644
--- a/include/linux/stacktrace.h
+++ b/include/linux/stacktrace.h
@@ -18,6 +18,8 @@ extern void save_stack_trace_regs(struct pt_regs *regs,
 				  struct stack_trace *trace);
 extern void save_stack_trace_tsk(struct task_struct *tsk,
 				struct stack_trace *trace);
+extern int save_stack_trace_tsk_reliable(struct task_struct *tsk,
+					 struct stack_trace *trace);
 
 extern void print_stack_trace(struct stack_trace *trace, int spaces);
 extern int snprint_stack_trace(char *buf, size_t size,
@@ -29,12 +31,12 @@ extern void save_stack_trace_user(struct stack_trace *trace);
 # define save_stack_trace_user(trace)              do { } while (0)
 #endif
 
-#else
+#else /* !CONFIG_STACKTRACE */
 # define save_stack_trace(trace)			do { } while (0)
 # define save_stack_trace_tsk(tsk, trace)		do { } while (0)
 # define save_stack_trace_user(trace)			do { } while (0)
 # define print_stack_trace(trace, spaces)		do { } while (0)
 # define snprint_stack_trace(buf, size, trace, spaces)	do { } while (0)
Is there a reason you did not define empty save_stack_trace_tsk_reliable() 
here? Right, it should not be needed now as livepatching is the only user, 
but still.

Miroslav
Thread (44 messages) 44 messages, 4 authors, last reply 2017-02-09
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