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authorNathan Chancellor <nathan@kernel.org>2021-08-03 00:03:07 +0300
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2021-08-05 00:49:26 +0300
commitb18b851ba85a5855cb53865fcff3cd2c17b44b0b (patch)
treefce6311149ec8495add3f6c80e0b4b1503b799bf /scripts
parenta9d10ca4986571bffc19778742d508cc8dd13e02 (diff)
downloadlinux-b18b851ba85a5855cb53865fcff3cd2c17b44b0b.tar.xz
scripts/recordmcount.pl: Remove check_objcopy() and $can_use_local
When building ARCH=riscv allmodconfig with llvm-objcopy, the objcopy version warning from this script appears: WARNING: could not find objcopy version or version is less than 2.17. Local function references are disabled. The check_objcopy() function in scripts/recordmcount.pl is set up to parse GNU objcopy's version string, not llvm-objcopy's, which triggers the warning. Commit 799c43415442 ("kbuild: thin archives make default for all archs") made binutils 2.20 mandatory and commit ba64beb17493 ("kbuild: check the minimum assembler version in Kconfig") enforces this at configuration time so just remove check_objcopy() and $can_use_local instead, assuming --globalize-symbol is always available. llvm-objcopy has supported --globalize-symbol since LLVM 7.0.0 in 2018 and the minimum version for building the kernel with LLVM is 10.0.1 so there is no issue introduced: Link: https://github.com/llvm/llvm-project/commit/ee5be798dae30d5f9414b01f76ff807edbc881aa Link: https://lkml.kernel.org/r/20210802210307.3202472-1-nathan@kernel.org Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'scripts')
-rwxr-xr-xscripts/recordmcount.pl40
1 files changed, 0 insertions, 40 deletions
diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl
index c17e48020ec3..8f6b13ae46bf 100755
--- a/scripts/recordmcount.pl
+++ b/scripts/recordmcount.pl
@@ -173,39 +173,6 @@ my $mcount_regex; # Find the call site to mcount (return offset)
my $mcount_adjust; # Address adjustment to mcount offset
my $alignment; # The .align value to use for $mcount_section
my $section_type; # Section header plus possible alignment command
-my $can_use_local = 0; # If we can use local function references
-
-# Shut up recordmcount if user has older objcopy
-my $quiet_recordmcount = ".tmp_quiet_recordmcount";
-my $print_warning = 1;
-$print_warning = 0 if ( -f $quiet_recordmcount);
-
-##
-# check_objcopy - whether objcopy supports --globalize-symbols
-#
-# --globalize-symbols came out in 2.17, we must test the version
-# of objcopy, and if it is less than 2.17, then we can not
-# record local functions.
-sub check_objcopy
-{
- open (IN, "$objcopy --version |") or die "error running $objcopy";
- while (<IN>) {
- if (/objcopy.*\s(\d+)\.(\d+)/) {
- $can_use_local = 1 if ($1 > 2 || ($1 == 2 && $2 >= 17));
- last;
- }
- }
- close (IN);
-
- if (!$can_use_local && $print_warning) {
- print STDERR "WARNING: could not find objcopy version or version " .
- "is less than 2.17.\n" .
- "\tLocal function references are disabled.\n";
- open (QUIET, ">$quiet_recordmcount");
- printf QUIET "Disables the warning from recordmcount.pl\n";
- close QUIET;
- }
-}
if ($arch =~ /(x86(_64)?)|(i386)/) {
if ($bits == 64) {
@@ -434,8 +401,6 @@ if ($filename =~ m,^(.*)(\.\S),) {
my $mcount_s = $dirname . "/.tmp_mc_" . $prefix . ".s";
my $mcount_o = $dirname . "/.tmp_mc_" . $prefix . ".o";
-check_objcopy();
-
#
# Step 1: find all the local (static functions) and weak symbols.
# 't' is local, 'w/W' is weak
@@ -473,11 +438,6 @@ sub update_funcs
# is this function static? If so, note this fact.
if (defined $locals{$ref_func}) {
-
- # only use locals if objcopy supports globalize-symbols
- if (!$can_use_local) {
- return;
- }
$convert{$ref_func} = 1;
}