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SubjectRe: [PATCH v2] devres: use MACRO instead of function for devm_ioremap
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Ping... and sorry to disturb.

Hi maintainers,
Could you please help to review this patch?

Thanks
Yisheng xie

On 2017/11/25 17:23, 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, while many use devm_ioremap.
>
> This patch is to use MACRO for devm_ioremap, which will reduce the size of
> devres.o from 206824 Bytes to 203768 Bytes.
>
> Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
> ---
> v2:
> * MACRO devm_ioremap instead of devm_ioremap_nocache
>
> include/linux/io.h | 4 ++--
> lib/devres.c | 30 +-----------------------------
> 2 files changed, 3 insertions(+), 31 deletions(-)
>
> diff --git a/include/linux/io.h b/include/linux/io.h
> index 32e30e8..3759882 100644
> --- a/include/linux/io.h
> +++ b/include/linux/io.h
> @@ -73,8 +73,6 @@ static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
>
> #define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err)
>
> -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,
> @@ -84,6 +82,8 @@ 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 devm_ioremap_nocache
> +
> void *devm_memremap(struct device *dev, resource_size_t offset,
> size_t size, unsigned long flags);
> void devm_memunmap(struct device *dev, void *addr);
> diff --git a/lib/devres.c b/lib/devres.c
> index 5f2aedd..ebfaab1 100644
> --- a/lib/devres.c
> +++ b/lib/devres.c
> @@ -16,34 +16,6 @@ static int devm_ioremap_match(struct device *dev, void *res, void *match_data)
> }
>
> /**
> - * devm_ioremap - Managed ioremap()
> - * @dev: Generic device to remap IO address for
> - * @offset: Resource address to map
> - * @size: Size of map
> - *
> - * Managed ioremap(). Map is automatically unmapped on driver detach.
> - */
> -void __iomem *devm_ioremap(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(offset, size);
> - if (addr) {
> - *ptr = addr;
> - devres_add(dev, ptr);
> - } else
> - devres_free(ptr);
> -
> - return addr;
> -}
> -EXPORT_SYMBOL(devm_ioremap);
> -
> -/**
> * devm_ioremap_nocache - Managed ioremap_nocache()
> * @dev: Generic device to remap IO address for
> * @offset: Resource address to map
> @@ -153,7 +125,7 @@ void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res)
> return IOMEM_ERR_PTR(-EBUSY);
> }
>
> - dest_ptr = devm_ioremap(dev, res->start, size);
> + dest_ptr = devm_ioremap_nocache(dev, res->start, size);
> if (!dest_ptr) {
> dev_err(dev, "ioremap failed for resource %pR\n", res);
> devm_release_mem_region(dev, res->start, size);
>

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