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Date: Tue, 5 Jan 2016 12:43:41 +0900
From: Masahiro Yamada <yamada.masahiro@...ionext.com>
To: linux-clk@...r.kernel.org
Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>,
Stephen Boyd <sboyd@...eaurora.org>,
Michael Turquette <mturquette@...libre.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH] clk: optimize the divider walk in clk_divider_bestdiv()
Because _next_div() returns a valid divider, there is no need to
consult _is_valid_div() for the validity of the divider in every
iteration.
Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---
drivers/clk/clk-divider.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index 358b9f9..8ced09e 100644
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -304,9 +304,8 @@ static int clk_divider_bestdiv(struct clk_hw *hw, unsigned long rate,
*/
maxdiv = min(ULONG_MAX / rate, maxdiv);
- for (i = 1; i <= maxdiv; i = _next_div(table, i, flags)) {
- if (!_is_valid_div(table, i, flags))
- continue;
+ for (i = _next_div(table, 0, flags); i <= maxdiv;
+ i = _next_div(table, i, flags)) {
if (rate * i == parent_rate_saved) {
/*
* It's the most ideal case if the requested rate can be
--
1.9.1
--
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