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authorMasahiro Yamada <masahiroy@kernel.org>2022-09-26 12:02:29 +0300
committerMasahiro Yamada <masahiroy@kernel.org>2022-10-02 21:51:58 +0300
commitd32b55f4bb43466bc6cdd98a00f8a600bbf7e8ec (patch)
treedb13a5f1130b72765fce5625e6db491cab057808 /scripts
parentaa221f2ea58655f5360e7b0c6fe5482f7c41855e (diff)
downloadlinux-d32b55f4bb43466bc6cdd98a00f8a600bbf7e8ec.tar.xz
kallsyms: ignore __kstrtab_* and __kstrtabns_* symbols
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>
Diffstat (limited to 'scripts')
-rwxr-xr-xscripts/mksysmap4
1 files changed, 4 insertions, 0 deletions
diff --git a/scripts/mksysmap b/scripts/mksysmap
index 75f3dfd1c156..16a08b8ef2f8 100755
--- a/scripts/mksysmap
+++ b/scripts/mksysmap
@@ -43,6 +43,8 @@
# $ - 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?
@@ -52,5 +54,7 @@ $NM -n $1 | grep -v \
-e ' \$' \
-e ' \.L' \
-e ' __crc_' \
+ -e ' __kstrtab_' \
+ -e ' __kstrtabns_' \
-e ' L0$' \
> $2