Messages in this thread Patch in this message | | | From | Marc Gonzalez <> | Subject | [RFC PATCH v2] clk: Use a new helper in managed functions | Date | Wed, 22 Jan 2020 14:02:16 +0100 |
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Introduce devm_add() to factorize devres_alloc/devres_add calls.
Using that helper produces simpler code and smaller object size:
1 file changed, 27 insertions(+), 66 deletions(-)
text data bss dec hex filename - 1708 80 0 1788 6fc drivers/clk/clk-devres.o + 1508 80 0 1588 634 drivers/clk/clk-devres.o
Signed-off-by: Marc Gonzalez <marc.w.gonzalez@free.fr> --- drivers/base/devres.c | 14 ++++++ drivers/clk/clk-devres.c | 93 ++++++++++++---------------------------- include/linux/device.h | 1 + 3 files changed, 42 insertions(+), 66 deletions(-)
diff --git a/drivers/base/devres.c b/drivers/base/devres.c index 0bbb328bd17f..76392dd6273b 100644 --- a/drivers/base/devres.c +++ b/drivers/base/devres.c @@ -685,6 +685,20 @@ int devres_release_group(struct device *dev, void *id) } EXPORT_SYMBOL_GPL(devres_release_group); +void *devm_add(struct device *dev, dr_release_t func, void *arg, size_t size) +{ + void *data = devres_alloc(func, size, GFP_KERNEL); + + if (data) { + memcpy(data, arg, size); + devres_add(dev, data); + } else + func(dev, arg); + + return data; +} +EXPORT_SYMBOL_GPL(devm_add); + /* * Custom devres actions allow inserting a simple function call * into the teadown sequence. diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c index be160764911b..582fda9ad6a6 100644 --- a/drivers/clk/clk-devres.c +++ b/drivers/clk/clk-devres.c @@ -4,26 +4,18 @@ #include <linux/export.h> #include <linux/gfp.h> -static void devm_clk_release(struct device *dev, void *res) +static void wrap_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); - } + struct clk *clk = clk_get(dev, id); + + if (!IS_ERR(clk)) + if (!devm_add(dev, wrap_clk_put, &clk, sizeof(clk))) + clk = ERR_PTR(-ENOMEM); return clk; } @@ -33,10 +25,7 @@ struct clk *devm_clk_get_optional(struct device *dev, const char *id) { struct clk *clk = devm_clk_get(dev, id); - if (clk == ERR_PTR(-ENOENT)) - return NULL; - - return clk; + return clk == ERR_PTR(-ENOENT) ? NULL : clk; } EXPORT_SYMBOL(devm_clk_get_optional); @@ -45,7 +34,7 @@ struct clk_bulk_devres { int num_clks; }; -static void devm_clk_bulk_release(struct device *dev, void *res) +static void wrap_clk_bulk_put(struct device *dev, void *res) { struct clk_bulk_devres *devres = res; @@ -55,25 +44,17 @@ 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; + struct clk_bulk_devres arg = { clks, num_clks }; 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); - } + + if (!ret) + if (!devm_add(dev, wrap_clk_bulk_put, &arg, sizeof(arg))) + ret = -ENOMEM; return ret; } @@ -95,24 +76,16 @@ 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; + struct clk_bulk_devres arg; - 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); - } + arg.num_clks = clk_bulk_get_all(dev, clks); + arg.clks = *clks; - return ret; + if (arg.num_clks > 0) + if (!devm_add(dev, wrap_clk_bulk_put, &arg, sizeof(arg))) + arg.num_clks = -ENOMEM; + + return arg.num_clks; } EXPORT_SYMBOL_GPL(devm_clk_bulk_get_all); @@ -128,30 +101,18 @@ static int devm_clk_match(struct device *dev, void *res, void *data) void devm_clk_put(struct device *dev, struct clk *clk) { - int ret; - - ret = devres_release(dev, devm_clk_release, devm_clk_match, clk); - - WARN_ON(ret); + WARN_ON(devres_release(dev, wrap_clk_put, devm_clk_match, clk)); } 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); - } + struct clk *clk = of_clk_get_by_name(np, con_id); + + if (!IS_ERR(clk)) + if (!devm_add(dev, wrap_clk_put, &clk, sizeof(clk))) + clk = ERR_PTR(-ENOMEM); return clk; } diff --git a/include/linux/device.h b/include/linux/device.h index e226030c1df3..d47872c5ab72 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -969,6 +969,7 @@ void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index, resource_size_t *size); +void *devm_add(struct device *dev, dr_release_t func, void *arg, size_t size); /* allows to add/remove a custom action to devres stack */ int devm_add_action(struct device *dev, void (*action)(void *), void *data); void devm_remove_action(struct device *dev, void (*action)(void *), void *data); -- 2.17.1
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