Simplify kallsyms_lookup()

Several kallsyms_lookup() pass dummy arguments but only need, say, module's
name.  Make kallsyms_lookup() accept NULLs where possible.

Also, makes picture clearer about what interfaces are needed for all symbol
resolving business.

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

2 files changed, 2 insertions, 6 deletions

diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index 59df5e8555a8..fe9314a89f20 100644
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -40,11 +40,9 @@ static void print_name_offset(struct seq_file *m, void *sym)
 {
         unsigned long addr = (unsigned long)sym;
         char namebuf[KSYM_NAME_LEN+1];
-        unsigned long size, offset;
         const char *sym_name;
-        char *modname;
 
-        sym_name = kallsyms_lookup(addr, &size, &offset, &modname, namebuf);
+        sym_name = kallsyms_lookup(addr, NULL, NULL, NULL, namebuf);
         if (sym_name)
                 SEQ_printf(m, "%s", sym_name);
         else
diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c
index 1bc4882e28e0..946ed45f7d2f 100644
--- a/kernel/time/timer_stats.c
+++ b/kernel/time/timer_stats.c
@@ -258,11 +258,9 @@ void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
 static void print_name_offset(struct seq_file *m, unsigned long addr)
 {
         char namebuf[KSYM_NAME_LEN+1];
-        unsigned long size, offset;
         const char *sym_name;
-        char *modname;
 
-        sym_name = kallsyms_lookup(addr, &size, &offset, &modname, namebuf);
+        sym_name = kallsyms_lookup(addr, NULL, NULL, NULL, namebuf);
         if (sym_name)
                 seq_printf(m, "%s", sym_name);
         else