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| author | Ingo Molnar <mingo@elte.hu> | 2008-12-25 13:21:20 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-25 13:44:43 +0300 |
| commit | 9212ddb5eada64fec5a08b28207401f3cc3d0876 (patch) | |
| tree | 3b1a6040813d623d5d2d077bffd0dea5fb36f693 /kernel | |
| parent | 4a6908a3a050aacc9c3a2f36b276b46c0629ad91 (diff) | |
| download | linux-9212ddb5eada64fec5a08b28207401f3cc3d0876.tar.xz | |
stacktrace: provide save_stack_trace_tsk() weak alias
Impact: build fix
Some architectures have not implemented save_stack_trace_tsk() yet:
fs/built-in.o: In function `proc_pid_stack':
base.c:(.text+0x3f140): undefined reference to `save_stack_trace_tsk'
So warn about that if the facility is used.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/stacktrace.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/stacktrace.c b/kernel/stacktrace.c index 94b527ef1d1e..eb212f8f8bc8 100644 --- a/kernel/stacktrace.c +++ b/kernel/stacktrace.c @@ -6,6 +6,7 @@ * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> */ #include <linux/sched.h> +#include <linux/kernel.h> #include <linux/module.h> #include <linux/kallsyms.h> #include <linux/stacktrace.h> @@ -24,3 +25,13 @@ void print_stack_trace(struct stack_trace *trace, int spaces) } EXPORT_SYMBOL_GPL(print_stack_trace); +/* + * Architectures that do not implement save_stack_trace_tsk get this + * weak alias and a once-per-bootup warning (whenever this facility + * is utilized - for example by procfs): + */ +__weak void +save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace) +{ + WARN_ONCE(1, KERN_INFO "save_stack_trace_tsk() not implemented yet.\n"); +} |