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SubjectRe: [PATCH] devres: use MACRO instead of function for devm_ioremap_nocache
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On 2017/11/20 17:32, Yisheng Xie wrote:
> Default ioremap is ioremap_nocache, so devm_ioremap has the same function
> with devm_ioremap_nocache, which may just be killed. However, there
> are many places which use devm_ioremap_nocache instead of devm_ioremap.
>
> This patch is to use MACRO for devm_ioremap_nocache, which will reduce
> the size of devres.o from 206824 Bytes to 203912 Bytes.
Oh, maybe it is better to let devm_ioremap use MACRO, and user may more clear
to know that devm_ioremap is default is devm_ioremap*_nocache*.

Any suggestions?

Thanks
Yisheng Xie
>
> Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
> ---
> include/linux/io.h | 3 +--
> lib/devres.c | 29 -----------------------------
> 2 files changed, 1 insertion(+), 31 deletions(-)
>
> diff --git a/include/linux/io.h b/include/linux/io.h
> index 32e30e8..1516ccd 100644
> --- a/include/linux/io.h
> +++ b/include/linux/io.h
> @@ -75,14 +75,13 @@ static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
>
> void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
> resource_size_t size);
> -void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
> - resource_size_t size);
> void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
> resource_size_t size);
> void devm_iounmap(struct device *dev, void __iomem *addr);
> int check_signature(const volatile void __iomem *io_addr,
> const unsigned char *signature, int length);
> void devm_ioremap_release(struct device *dev, void *res);
> +#define devm_ioremap_nocache devm_ioremap
>
> void *devm_memremap(struct device *dev, resource_size_t offset,
> size_t size, unsigned long flags);
> diff --git a/lib/devres.c b/lib/devres.c
> index 5f2aedd..f818fcf 100644
> --- a/lib/devres.c
> +++ b/lib/devres.c
> @@ -44,35 +44,6 @@ void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
> EXPORT_SYMBOL(devm_ioremap);
>
> /**
> - * devm_ioremap_nocache - Managed ioremap_nocache()
> - * @dev: Generic device to remap IO address for
> - * @offset: Resource address to map
> - * @size: Size of map
> - *
> - * Managed ioremap_nocache(). Map is automatically unmapped on driver
> - * detach.
> - */
> -void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
> - resource_size_t size)
> -{
> - void __iomem **ptr, *addr;
> -
> - ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
> - if (!ptr)
> - return NULL;
> -
> - addr = ioremap_nocache(offset, size);
> - if (addr) {
> - *ptr = addr;
> - devres_add(dev, ptr);
> - } else
> - devres_free(ptr);
> -
> - return addr;
> -}
> -EXPORT_SYMBOL(devm_ioremap_nocache);
> -
> -/**
> * devm_ioremap_wc - Managed ioremap_wc()
> * @dev: Generic device to remap IO address for
> * @offset: Resource address to map
>

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