Simplify module_get_kallsym() by dropping length arg

module_get_kallsym() could in theory truncate module symbol name to fit in
buffer, but nobody does this.  Always use KSYM_NAME_LEN + 1 bytes for name.

Suggested by lg^WRusty.

Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 4 insertions, 3 deletions

diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index 5a0de8409739..d086c91d44ed 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -312,7 +312,7 @@ static int get_ksymbol_mod(struct kallsym_iter *iter)
 {
         iter->owner = module_get_kallsym(iter->pos - kallsyms_num_syms,
                                          &iter->value, &iter->type,
-                                         iter->name, sizeof(iter->name));
+                                         iter->name);
         if (iter->owner == NULL)
                 return 0;
 
diff --git a/kernel/module.c b/kernel/module.c
index 9bdbd1217a6f..43a529a1fa48 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -19,6 +19,7 @@
 #include <linux/module.h>
 #include <linux/moduleloader.h>
 #include <linux/init.h>
+#include <linux/kallsyms.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
@@ -2124,7 +2125,7 @@ const char *module_address_lookup(unsigned long addr,
 }
 
 struct module *module_get_kallsym(unsigned int symnum, unsigned long *value,
-                                char *type, char *name, size_t namelen)
+                                char *type, char *name)
 {
         struct module *mod;
 
@@ -2134,7 +2135,7 @@ struct module *module_get_kallsym(unsigned int symnum, unsigned long *value,
                         *value = mod->symtab[symnum].st_value;
                         *type = mod->symtab[symnum].st_info;
                         strlcpy(name, mod->strtab + mod->symtab[symnum].st_name,
-                                namelen);
+                                KSYM_NAME_LEN + 1);
                         mutex_unlock(&module_mutex);
                         return mod;
                 }