From: Keith Owens Date: Fri, 3 Feb 2006 11:03:53 +0000 (-0800) Subject: [PATCH] Tell kallsyms_lookup_name() to ignore type U entries X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=54e8ce463a7e21dbe9dad57723ed47653ee5db15;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git [PATCH] Tell kallsyms_lookup_name() to ignore type U entries When one module exports a function symbol and another module uses that symbol then kallsyms shows the symbol twice. Once from the consumer with a type of 'U' and once from the provider with a type of 't' or 'T'. On most architectures, both entries have the same address so it does not matter which one is returned by kallsyms_lookup_name(). But on architectures with function descriptors, the 'U' entry points to the descriptor, not to the code body, which is not what we want. IA64 # grep -w qla2x00_remove_one /proc/kallsyms a000000208c25ef8 U qla2x00_remove_one [qla2300] <= descriptor a000000208bf44c0 t qla2x00_remove_one [qla2xxx] <= function body Tell kallsyms_lookup_name() to ignore type U entries in modules. Signed-off-by: Keith Owens Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/kernel/module.c b/kernel/module.c index 618ed6e23ecc..e058aedf6b93 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -2092,7 +2092,8 @@ static unsigned long mod_find_symname(struct module *mod, const char *name) unsigned int i; for (i = 0; i < mod->num_symtab; i++) - if (strcmp(name, mod->strtab+mod->symtab[i].st_name) == 0) + if (strcmp(name, mod->strtab+mod->symtab[i].st_name) == 0 && + mod->symtab[i].st_info != 'U') return mod->symtab[i].st_value; return 0; }