From ca0f9ae65b16189e424085a5deb758fe92cdde47 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Mon, 1 Jun 2020 14:57:05 +0900 Subject: [PATCH] modpost: track if the symbol origin is a dump file or ELF object The meaning of sym->kernel is obscure; it is set for in-kernel symbols loaded from Modules.symvers. This happens only when we are building external modules, and it is used to determine whether to dump symbols to $(KBUILD_EXTMOD)/Modules.symvers It is clearer to remember whether the symbol or module came from a dump file or ELF object. This changes the KBUILD_EXTRA_SYMBOLS behavior. Previously, symbols loaded from KBUILD_EXTRA_SYMBOLS are accumulated into the current $(KBUILD_EXTMOD)/Modules.symvers Going forward, they will be only used to check symbol references, but not dumped into the current $(KBUILD_EXTMOD)/Modules.symvers. I believe this makes more sense. sym->vmlinux will have no user. Remove it too. Signed-off-by: Masahiro Yamada --- scripts/mod/modpost.c | 15 +++++---------- scripts/mod/modpost.h | 1 + 2 files changed, 6 insertions(+), 10 deletions(-) diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 5224a02edbf27..60f35b89cea28 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -161,9 +161,6 @@ struct symbol { int crc_valid; char *namespace; unsigned int weak:1; - unsigned int vmlinux:1; /* 1 if symbol is defined in vmlinux */ - unsigned int kernel:1; /* 1 if symbol is from kernel - * (only for external modules) **/ unsigned int is_static:1; /* 1 if symbol is not global */ enum export export; /* Type of export */ char name[]; @@ -398,8 +395,6 @@ static struct symbol *sym_add_exported(const char *name, struct module *mod, } s->module = mod; - s->vmlinux = is_vmlinux(mod->name); - s->kernel = 0; s->export = export; return s; } @@ -2427,7 +2422,7 @@ static void write_if_changed(struct buffer *b, const char *fname) /* parse Module.symvers file. line format: * 0x12345678symbolmoduleexportnamespace **/ -static void read_dump(const char *fname, unsigned int kernel) +static void read_dump(const char *fname) { unsigned long size, pos = 0; void *file = grab_file(fname, &size); @@ -2465,9 +2460,9 @@ static void read_dump(const char *fname, unsigned int kernel) have_vmlinux = 1; mod = new_module(modname); mod->skip = 1; + mod->from_dump = 1; } s = sym_add_exported(symname, mod, export_no(export)); - s->kernel = kernel; s->is_static = 0; sym_set_crc(symname, crc); sym_update_namespace(symname, namespace); @@ -2487,7 +2482,7 @@ static int dump_sym(struct symbol *sym) { if (!external_module) return 1; - if (sym->vmlinux || sym->kernel) + if (sym->module->from_dump) return 0; return 1; } @@ -2606,11 +2601,11 @@ int main(int argc, char **argv) } if (kernel_read) - read_dump(kernel_read, 1); + read_dump(kernel_read); while (extsym_start) { struct ext_sym_list *tmp; - read_dump(extsym_start->file, 0); + read_dump(extsym_start->file); tmp = extsym_start->next; free(extsym_start); extsym_start = tmp; diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h index 39f6c29fb5685..933a88c733bc3 100644 --- a/scripts/mod/modpost.h +++ b/scripts/mod/modpost.h @@ -119,6 +119,7 @@ struct module { const char *name; int gpl_compatible; struct symbol *unres; + int from_dump; /* 1 if module was loaded from *.symvers */ int seen; int skip; int has_init; -- 2.39.5