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kbuild: redo fake deps at include/ksym/*.h

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Commit 0e0345b77a ("kbuild: redo fake deps at include/config/*.h")
simplified the Kconfig/fixdep interaction a lot.

For CONFIG_FOO_BAR_BAZ, Kconfig now touches include/config/FOO_BAR_BAZ
instead of the previous include/config/foo/bar/baz.h .

This commit simplifies the TRIM_UNUSED_KSYMS feature in a similar way:

  - delete .h suffix
  - delete tolower()
  - put everything in 1 directory

For EXPORT_SYMBOL(FOO_BAR_BAZ), scripts/adjust_autoksyms.sh now touches
include/ksym/FOO_BAR_BAZ instead of include/ksym/foo/bar/baz.h .

This is more precise, avoiding possibly unnecessary rebuilds.

  EXPORT_SYMBOL(FOO_BAR_BAZ)
  EXPORT_SYMBOL(_FOO_BAR_BAZ)
  EXPORT_SYMBOL(__FOO_BAR_BAZ)

were previously mapped to the same header, include/ksym/foo/bar/baz.h
but now are handled separately.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Masahiro Yamada 2021-08-30 17:20:33 +09:00
parent 44815c9021
commit bc7cd2dd1f
2 changed files with 4 additions and 5 deletions
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4
scripts/adjust_autoksyms.sh
View file

@ -42,10 +42,10 @@ $CONFIG_SHELL $srctree/scripts/gen_autoksyms.sh "$new_ksyms_file"
changed=$(
count=0
sort "$cur_ksyms_file" "$new_ksyms_file" | uniq -u |
sed -n 's/^#define __KSYM_\(.*\) 1/\1/p' | tr "A-Z_" "a-z/" |
sed -n 's/^#define __KSYM_\(.*\) 1/\1/p' |
while read sympath; do
if [ -z "$sympath" ]; then continue; fi
depfile="include/ksym/${sympath}.h"
depfile="include/ksym/${sympath}"
mkdir -p "$(dirname "$depfile")"
touch "$depfile"
# Filesystems with coarse time precision may create timestamps

5
scripts/gen_ksymdeps.sh
View file

@ -10,7 +10,7 @@ set -e
# TODO:
# Use -q instead of 2>/dev/null when we upgrade the minimum version of
# binutils to 2.37, llvm to 13.0.0.
ksyms=$($NM $1 2>/dev/null | sed -n 's/.*__ksym_marker_\(.*\)/\1/p' | tr A-Z a-z)
ksyms=$($NM $1 2>/dev/null | sed -n 's/.*__ksym_marker_\(.*\)/\1/p')
if [ -z "$ksyms" ]; then
exit 0
@ -21,8 +21,7 @@ echo "ksymdeps_$1 := \\"
for s in $ksyms
do
echo $s | sed -e 's:^_*: $(wildcard include/ksym/:' \
-e 's:__*:/:g' -e 's/$/.h) \\/'
printf ' $(wildcard include/ksym/%s) \\\n' "$s"
done
echo