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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2020-01-02 22:02:41 -0500
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2020-01-02 22:04:07 -0500
commitb8299d362d0837ae39e87e9019ebe6b736e0f035 (patch)
tree01a1fb51b5aae3c562f26ad0cfe2f37d5bd922d4 /kernel
parentd2ccbccb5444e9141b33cf5399927737e9ff1c3d (diff)
tracing: Have stack tracer compile when MCOUNT_INSN_SIZE is not defined
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>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/trace_stack.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c
index 4df9a209f7ca..c557f42a9397 100644
--- a/kernel/trace/trace_stack.c
+++ b/kernel/trace/trace_stack.c
@@ -283,6 +283,11 @@ static void 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)