From: Li Hong If a weak function is used as a relocation reference for mcount callers and that function is overridden, it will cause ftrace to fail at run time. The current code should prevent a weak function from being used, but if one is, the code should exit with an error to fail at compile time. Signed-off-by: Li Hong LKML-Reference: <20091028050743.GH30758@uhli> Signed-off-by: Steven Rostedt --- scripts/recordmcount.pl | 10 +++------- 1 files changed, 3 insertions(+), 7 deletions(-) diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl index 884776a..a4e2435 100755 --- a/scripts/recordmcount.pl +++ b/scripts/recordmcount.pl @@ -350,15 +350,11 @@ sub update_funcs { return unless ($ref_func and @offsets); - # A section only had a weak function, to represent it. - # Unfortunately, a weak function may be overwritten by another - # function of the same name, making all these offsets incorrect. - # To be safe, we simply print a warning and bail. + # Sanity check on weak function. A weak function may be overwritten by + # another function of the same name, making all these offsets incorrect. if (defined $weak{$ref_func}) { - print STDERR - "$inputfile: WARNING: referencing weak function" . + die "$inputfile: ERROR: referencing weak function" . " $ref_func for mcount\n"; - return; } # is this function static? If so, note this fact. -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/