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Date: Tue, 10 Mar 2020 11:19:16 +0100
From: Marc Gonzalez <marc.w.gonzalez@...e.fr>
To: Stephen Boyd <sboyd@...nel.org>,
Michael Turquette <mturquette@...libre.com>,
Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
Russell King <linux@...linux.org.uk>,
Sudip Mukherjee <sudipm.mukherjee@...il.com>,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
Guenter Roeck <linux@...ck-us.net>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Robin Murphy <robin.murphy@....com>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Arnd Bergmann <arnd@...db.de>,
Ard Biesheuvel <ard.biesheuvel@...aro.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Rafael Wysocki <rjw@...ysocki.net>,
Suzuki Poulose <suzuki.poulose@....com>,
Mark Rutland <mark.rutland@....com>
Cc: linux-clk <linux-clk@...r.kernel.org>,
Linux ARM <linux-arm-kernel@...ts.infradead.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH v5 2/2] clk: Use devm_add in managed functions
Using the helper produces simpler code and smaller object size.
E.g. with gcc-arm-9.2-2019.12-x86_64-aarch64-none-linux-gnu:
text data bss dec hex filename
- 1708 80 0 1788 6fc drivers/clk/clk-devres.o
+ 1524 80 0 1604 644 drivers/clk/clk-devres.o
Signed-off-by: Marc Gonzalez <marc.w.gonzalez@...e.fr>
Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
This patch needs testing on a platform with many clocks.
---
drivers/clk/clk-devres.c | 97 +++++++++++++++-------------------------
1 file changed, 36 insertions(+), 61 deletions(-)
diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c
index be160764911b..537fabf3a2a4 100644
--- a/drivers/clk/clk-devres.c
+++ b/drivers/clk/clk-devres.c
@@ -4,26 +4,22 @@
#include <linux/export.h>
#include <linux/gfp.h>
-static void devm_clk_release(struct device *dev, void *res)
+static void my_clk_put(struct device *dev, void *res)
{
clk_put(*(struct clk **)res);
}
struct clk *devm_clk_get(struct device *dev, const char *id)
{
- struct clk **ptr, *clk;
-
- ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL);
- if (!ptr)
- return ERR_PTR(-ENOMEM);
-
- clk = clk_get(dev, id);
- if (!IS_ERR(clk)) {
- *ptr = clk;
- devres_add(dev, ptr);
- } else {
- devres_free(ptr);
- }
+ int ret;
+ struct clk *clk = clk_get(dev, id);
+
+ if (IS_ERR(clk))
+ return clk;
+
+ ret = devm_add(dev, my_clk_put, &clk, sizeof(clk));
+ if (ret)
+ return ERR_PTR(ret);
return clk;
}
@@ -40,14 +36,14 @@ struct clk *devm_clk_get_optional(struct device *dev, const char *id)
}
EXPORT_SYMBOL(devm_clk_get_optional);
-struct clk_bulk_devres {
- struct clk_bulk_data *clks;
+struct clk_bulk_args {
int num_clks;
+ struct clk_bulk_data *clks;
};
-static void devm_clk_bulk_release(struct device *dev, void *res)
+static void my_clk_bulk_put(struct device *dev, void *res)
{
- struct clk_bulk_devres *devres = res;
+ struct clk_bulk_args *devres = res;
clk_bulk_put(devres->num_clks, devres->clks);
}
@@ -55,27 +51,17 @@ static void devm_clk_bulk_release(struct device *dev, void *res)
static int __devm_clk_bulk_get(struct device *dev, int num_clks,
struct clk_bulk_data *clks, bool optional)
{
- struct clk_bulk_devres *devres;
int ret;
- devres = devres_alloc(devm_clk_bulk_release,
- sizeof(*devres), GFP_KERNEL);
- if (!devres)
- return -ENOMEM;
-
if (optional)
ret = clk_bulk_get_optional(dev, num_clks, clks);
else
ret = clk_bulk_get(dev, num_clks, clks);
- if (!ret) {
- devres->clks = clks;
- devres->num_clks = num_clks;
- devres_add(dev, devres);
- } else {
- devres_free(devres);
- }
- return ret;
+ if (ret)
+ return ret;
+
+ return devm_vadd(dev, my_clk_bulk_put, clk_bulk_args, num_clks, clks);
}
int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
@@ -95,24 +81,17 @@ EXPORT_SYMBOL_GPL(devm_clk_bulk_get_optional);
int __must_check devm_clk_bulk_get_all(struct device *dev,
struct clk_bulk_data **clks)
{
- struct clk_bulk_devres *devres;
int ret;
+ int num_clks = clk_bulk_get_all(dev, clks);
- devres = devres_alloc(devm_clk_bulk_release,
- sizeof(*devres), GFP_KERNEL);
- if (!devres)
- return -ENOMEM;
-
- ret = clk_bulk_get_all(dev, &devres->clks);
- if (ret > 0) {
- *clks = devres->clks;
- devres->num_clks = ret;
- devres_add(dev, devres);
- } else {
- devres_free(devres);
- }
+ if (num_clks <= 0)
+ return num_clks;
- return ret;
+ ret = devm_vadd(dev, my_clk_bulk_put, clk_bulk_args, num_clks, *clks);
+ if (ret)
+ return ret;
+
+ return num_clks;
}
EXPORT_SYMBOL_GPL(devm_clk_bulk_get_all);
@@ -130,7 +109,7 @@ void devm_clk_put(struct device *dev, struct clk *clk)
{
int ret;
- ret = devres_release(dev, devm_clk_release, devm_clk_match, clk);
+ ret = devres_release(dev, my_clk_put, devm_clk_match, clk);
WARN_ON(ret);
}
@@ -139,19 +118,15 @@ EXPORT_SYMBOL(devm_clk_put);
struct clk *devm_get_clk_from_child(struct device *dev,
struct device_node *np, const char *con_id)
{
- struct clk **ptr, *clk;
-
- ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL);
- if (!ptr)
- return ERR_PTR(-ENOMEM);
-
- clk = of_clk_get_by_name(np, con_id);
- if (!IS_ERR(clk)) {
- *ptr = clk;
- devres_add(dev, ptr);
- } else {
- devres_free(ptr);
- }
+ int ret;
+ struct clk *clk = of_clk_get_by_name(np, con_id);
+
+ if (IS_ERR(clk))
+ return clk;
+
+ ret = devm_add(dev, my_clk_put, &clk, sizeof(clk));
+ if (ret)
+ return ERR_PTR(ret);
return clk;
}
--
2.17.1
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