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authorQuentin Perret <qperret@google.com>2020-02-28 17:20:15 +0000
committerMasahiro Yamada <masahiroy@kernel.org>2020-03-03 20:49:21 +0900
commit88694cff4952dba60227f421884ff4140d296900 (patch)
tree445ff14922494b49f026b0b7b81f31c296d7724a /scripts
parentcd195bc4775a5c07620bbb6fc19c4fa254b62b19 (diff)
kbuild: generate autoksyms.h early
When doing a cold build, autoksyms.h starts empty, and is updated late in the build process to have visibility over the symbols used by in-tree drivers. But since the symbol whitelist is known upfront, it can be used to pre-populate autoksyms.h and maximize the amount of code that can be compiled to its final state in a single pass, hence reducing build time. Do this by using gen_autoksyms.sh to initialize autoksyms.h instead of creating an empty file. Acked-by: Nicolas Pitre <nico@fluxnic.net> Tested-by: Matthias Maennich <maennich@google.com> Reviewed-by: Matthias Maennich <maennich@google.com> Signed-off-by: Quentin Perret <qperret@google.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'scripts')
-rwxr-xr-xscripts/gen_autoksyms.sh3
1 files changed, 2 insertions, 1 deletions
diff --git a/scripts/gen_autoksyms.sh b/scripts/gen_autoksyms.sh
index ef46200c366b..16c0b2ddaa4c 100755
--- a/scripts/gen_autoksyms.sh
+++ b/scripts/gen_autoksyms.sh
@@ -39,7 +39,8 @@ cat > "$output_file" << EOT
EOT
-sed 's/ko$/mod/' modules.order |
+[ -f modules.order ] && modlist=modules.order || modlist=/dev/null
+sed 's/ko$/mod/' $modlist |
xargs -n1 sed -n -e '2{s/ /\n/g;/^$/!p;}' -- |
cat - "$ksym_wl" |
sort -u |