From ffb45122766db220d0bf3d01848d575fbbcb6430 Mon Sep 17 00:00:00 2001
From: Alexey Dobriyan <adobriyan@sw.ru>
Date: Tue, 8 May 2007 00:28:41 -0700
Subject: 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>
---
 kernel/kallsyms.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'kernel/kallsyms.c')

diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index f1ea6f66ac6..f66da025cb7 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -214,8 +214,10 @@ static unsigned long get_symbol_pos(unsigned long addr,
 			symbol_end = (unsigned long)_etext;
 	}
 
-	*symbolsize = symbol_end - symbol_start;
-	*offset = addr - symbol_start;
+	if (symbolsize)
+		*symbolsize = symbol_end - symbol_start;
+	if (offset)
+		*offset = addr - symbol_start;
 
 	return low;
 }
-- 
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