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authorMasahiro Yamada <masahiroy@kernel.org>2022-04-05 14:33:54 +0300
committerMasahiro Yamada <masahiroy@kernel.org>2022-05-07 21:16:58 +0300
commit79f646e8654b6b8e4f7dda456ec3eabd51052041 (patch)
tree94f5ffbf2639714ca6e994b8668a701bc2b4999e /scripts/mod
parentb5f1a52a59eb810f68c96d1cea7cf1256c39956c (diff)
downloadlinux-79f646e8654b6b8e4f7dda456ec3eabd51052041.tar.xz
modpost: remove annoying namespace_from_kstrtabns()
There are two call sites for sym_update_namespace(). When the symbol has no namespace, s->namespace is set to NULL, but the conversion from "" to NULL is done in two different places. [1] read_symbols() This gets the namespace from __kstrtabns_<symbol>. If the symbol has no namespace, sym_get_data(info, sym) returns the empty string "". namespace_from_kstrtabns() converts it to NULL before it is passed to sym_update_namespace(). [2] read_dump() This gets the namespace from the dump file, *.symvers. If the symbol has no namespace, the 'namespace' is the empty string "", which is directly passed into sym_update_namespace(). The conversion from "" to NULL is done in sym_update_namespace(). namespace_from_kstrtabns() exists only for creating this inconsistency. Remove namespace_from_kstrtabns() so that sym_update_namespace() is consistently passed with "" instead of NULL. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Diffstat (limited to 'scripts/mod')
-rw-r--r--scripts/mod/modpost.c14
1 files changed, 2 insertions, 12 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 2a202764ff48..522d5249d196 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -369,13 +369,6 @@ static enum export export_from_secname(struct elf_info *elf, unsigned int sec)
return export_unknown;
}
-static const char *namespace_from_kstrtabns(const struct elf_info *info,
- const Elf_Sym *sym)
-{
- const char *value = sym_get_data(info, sym);
- return value[0] ? value : NULL;
-}
-
static void sym_update_namespace(const char *symname, const char *namespace)
{
struct symbol *s = find_symbol(symname);
@@ -391,8 +384,7 @@ static void sym_update_namespace(const char *symname, const char *namespace)
}
free(s->namespace);
- s->namespace =
- namespace && namespace[0] ? NOFAIL(strdup(namespace)) : NULL;
+ s->namespace = namespace[0] ? NOFAIL(strdup(namespace)) : NULL;
}
/**
@@ -2049,9 +2041,7 @@ static void read_symbols(const char *modname)
/* Apply symbol namespaces from __kstrtabns_<symbol> entries. */
if (strstarts(symname, "__kstrtabns_"))
sym_update_namespace(symname + strlen("__kstrtabns_"),
- namespace_from_kstrtabns(&info,
- sym));
-
+ sym_get_data(&info, sym));
if (strstarts(symname, "__crc_"))
handle_modversion(mod, &info, sym,
symname + strlen("__crc_"));