module: reduce symbol table for loaded modules (v2)

Discard all symbols not interesting for kallsyms use: absolute,
section, and in the common case (!KALLSYMS_ALL) data ones.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 7 insertions, 3 deletions

diff --git a/include/linux/module.h b/include/linux/module.h
index 1c755b2f937d..1d3ccb173fd6 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -308,9 +308,13 @@ struct module
 #endif
 
 #ifdef CONFIG_KALLSYMS
-        /* We keep the symbol and string tables for kallsyms. */
-        Elf_Sym *symtab;
-        unsigned int num_symtab;
+        /*
+         * We keep the symbol and string tables for kallsyms.
+         * The core_* fields below are temporary, loader-only (they
+         * could really be discarded after module init).
+         */
+        Elf_Sym *symtab, *core_symtab;
+        unsigned int num_symtab, core_num_syms;
         char *strtab;
 
         /* Section attributes */