[PATCH V3 01/17] kallsyms: Simplify update_iter_mod()

[Adrian Hunter <adrian.hunter@intel.com>]

The logic in update_iter_mod() is overcomplicated and gets worse every time
another get_ksymbol_* function is added.

In preparation for adding another get_ksymbol_* function, simplify logic in
update_iter_mod().

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
 kernel/kallsyms.c | 20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index a23e21ada81b..eda4b0222dab 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -510,23 +510,15 @@ static int update_iter_mod(struct kallsym_iter *iter, loff_t pos)
 {
 	iter->pos = pos;
 
-	if (iter->pos_ftrace_mod_end > 0 &&
-	    iter->pos_ftrace_mod_end < iter->pos)
-		return get_ksymbol_bpf(iter);
-
-	if (iter->pos_mod_end > 0 &&
-	    iter->pos_mod_end < iter->pos) {
-		if (!get_ksymbol_ftrace_mod(iter))
-			return get_ksymbol_bpf(iter);
+	if ((!iter->pos_mod_end || iter->pos_mod_end > pos) &&
+	    get_ksymbol_mod(iter))
 		return 1;
-	}
 
-	if (!get_ksymbol_mod(iter)) {
-		if (!get_ksymbol_ftrace_mod(iter))
-			return get_ksymbol_bpf(iter);
-	}
+	if ((!iter->pos_ftrace_mod_end || iter->pos_ftrace_mod_end > pos) &&
+	    get_ksymbol_ftrace_mod(iter))
+		return 1;
 
-	return 1;
+	return get_ksymbol_bpf(iter);
 }
 
 /* Returns false if pos at or past end of file. */
-- 
1.9.1