[PATCH][GIT PULL][v2.6.32] tracing/x86: Add check to detect GCC messing with mcount prologue

[H. Peter Anvin]

On 11/20/2009 11:46 AM, Steven Rostedt wrote:
> 
> Yes a gcc test suite will help new instances of gcc. But we need to
> worry about the instances of gcc that people have on their desktops now.
> This test case will catch the discrepancy between gcc and the function
> graph tracer. I'm not 100% convince that just adding -mtune=generic will
> help in all cases. If we miss another instance, then the function graph
> tracer may crash someone's kernel.
> 

Furthermore, for future gcc instances what we really want is the early
interception support anyway.

	-hpa