linux-kernel - [PATCH v2 09/21] clk: use match

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Date:   Thu, 31 May 2018 19:11:14 +0800
From:   Yisheng Xie <xieyisheng1@...wei.com>
To:     <linux-kernel@...r.kernel.org>
CC:     <andy.shevchenko@...il.com>, Yisheng Xie <xieyisheng1@...wei.com>,
        "Michael Turquette" <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, <linux-clk@...r.kernel.org>
Subject: [PATCH v2 09/21] clk: use match_string() helper

match_string() returns the index of an array for a matching string,
which can be used instead of open coded variant.

Cc: Michael Turquette <mturquette@...libre.com>
Cc: Stephen Boyd <sboyd@...nel.org>
Cc: linux-clk@...r.kernel.org
Signed-off-by: Yisheng Xie <xieyisheng1@...wei.com>
---
v2:
 - leave second parameter on the first line  - per Andy

 drivers/clk/clk.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 7af555f..d01bdda 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -2171,7 +2171,6 @@ void clk_hw_reparent(struct clk_hw *hw, struct clk_hw *new_parent)
 bool clk_has_parent(struct clk *clk, struct clk *parent)
 {
 	struct clk_core *core, *parent_core;
-	unsigned int i;
 
 	/* NULL clocks should be nops, so return success if either is NULL. */
 	if (!clk || !parent)
@@ -2184,11 +2183,8 @@ bool clk_has_parent(struct clk *clk, struct clk *parent)
 	if (core->parent == parent_core)
 		return true;
 
-	for (i = 0; i < core->num_parents; i++)
-		if (strcmp(core->parent_names[i], parent_core->name) == 0)
-			return true;
-
-	return false;
+	return match_string(core->parent_names, core->num_parents,
+			    parent_core->name) >= 0;
 }
 EXPORT_SYMBOL_GPL(clk_has_parent);
 
-- 
1.7.12.4