diff options
| author | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2020-01-02 22:02:41 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-14 20:05:40 +0100 |
| commit | f12e2598a5a2871dbba539ec4e943246594b4256 (patch) | |
| tree | a347f58fcb9b6cc23ae03370f99bbafc2ecd054b /kernel | |
| parent | d51eac9941a45be04f97c886656dc853db69e160 (diff) | |
tracing: Have stack tracer compile when MCOUNT_INSN_SIZE is not defined
commit b8299d362d0837ae39e87e9019ebe6b736e0f035 upstream.
On some archs with some configurations, MCOUNT_INSN_SIZE is not defined, and
this makes the stack tracer fail to compile. Just define it to zero in this
case.
Link: https://lore.kernel.org/r/202001020219.zvE3vsty%lkp@intel.com
Cc: stable@vger.kernel.org
Fixes: 4df297129f622 ("tracing: Remove most or all of stack tracer stack size from stack_max_size")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace_stack.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c index 719a52a4064a..6f9091f874a9 100644 --- a/kernel/trace/trace_stack.c +++ b/kernel/trace/trace_stack.c @@ -196,6 +196,11 @@ check_stack(unsigned long ip, unsigned long *stack) local_irq_restore(flags); } +/* Some archs may not define MCOUNT_INSN_SIZE */ +#ifndef MCOUNT_INSN_SIZE +# define MCOUNT_INSN_SIZE 0 +#endif + static void stack_trace_call(unsigned long ip, unsigned long parent_ip, struct ftrace_ops *op, struct pt_regs *pt_regs) |