Every EXPORT_SYMBOL creates __kstrtab_* and __kstrtabns_*, which
consumes 15-20% of the kallsyms entries.
For example, on the system built from the x86_64 defconfig,
$ cat /proc/kallsyms | wc
129527 388581 5685465
$ cat /proc/kallsyms | grep __kstrtab | wc
23489 70467 1187932
We already ignore __crc_* symbols populated by EXPORT_SYMBOL, so it
should be fine to ignore __kstrtab_* and __kstrtabns_* as well.
This makes vmlinux a bit smaller.
$ size vmlinux.before vmlinux.after
text data bss dec hex filename
22785374 8559694 1413328
32758396 1f3da7c vmlinux.before
22785374 8137806 1413328
32336508 1ed6a7c vmlinux.after
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
# $ - local symbols for ARM, MIPS, etc.
# .L - local labels, .LBB,.Ltmpxxx,.L__unnamed_xx,.LASANPC, etc.
# __crc_ - modversions
+# __kstrtab_ - EXPORT_SYMBOL (symbol name)
+# __kstrtabns_ - EXPORT_SYMBOL (namespace)
#
# Ignored symbols:
# L0 - for LoongArch?
-e ' \$' \
-e ' \.L' \
-e ' __crc_' \
+ -e ' __kstrtab_' \
+ -e ' __kstrtabns_' \
-e ' L0$' \
> $2