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Date: Thu, 7 Jan 2016 20:40:22 +0800
From: Dave Young <dyoung@...hat.com>
To: Toshi Kani <toshi.kani@....com>
Cc: akpm@...ux-foundation.org, bp@...en8.de,
linux-arch@...r.kernel.org, linux-mm@...ck.org,
linux-kernel@...r.kernel.org,
Dan Williams <dan.j.williams@...el.com>
Subject: Re: [PATCH v3 16/17] resource: Kill walk_iomem_res()
On 01/05/16 at 11:54am, Toshi Kani wrote:
> walk_iomem_res_desc() replaced walk_iomem_res(), and there is no
> caller to walk_iomem_res() any more.
>
> Kill walk_iomem_res(). Also remove @name from find_next_iomem_res()
> as it is no longer used.
>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Borislav Petkov <bp@...en8.de>
> Cc: Dan Williams <dan.j.williams@...el.com>
> Cc: Dave Young <dyoung@...hat.com>
> Signed-off-by: Toshi Kani <toshi.kani@....com>
> ---
> include/linux/ioport.h | 3 ---
> kernel/resource.c | 49 +++++-------------------------------------------
> 2 files changed, 5 insertions(+), 47 deletions(-)
>
> diff --git a/include/linux/ioport.h b/include/linux/ioport.h
> index 2a4a5e8..afb4559 100644
> --- a/include/linux/ioport.h
> +++ b/include/linux/ioport.h
> @@ -270,9 +270,6 @@ walk_system_ram_res(u64 start, u64 end, void *arg,
> extern int
> walk_iomem_res_desc(unsigned long desc, unsigned long flags, u64 start, u64 end,
> void *arg, int (*func)(u64, u64, void *));
> -extern int
> -walk_iomem_res(char *name, unsigned long flags, u64 start, u64 end, void *arg,
> - int (*func)(u64, u64, void *));
>
> /* True if any part of r1 overlaps r2 */
> static inline bool resource_overlaps(struct resource *r1, struct resource *r2)
> diff --git a/kernel/resource.c b/kernel/resource.c
> index 7b26f58..3ed5901 100644
> --- a/kernel/resource.c
> +++ b/kernel/resource.c
> @@ -335,13 +335,12 @@ EXPORT_SYMBOL(release_resource);
> /*
> * Finds the lowest iomem reosurce exists with-in [res->start.res->end)
> * the caller must specify res->start, res->end, res->flags, and optionally
> - * desc and "name". If found, returns 0, res is overwritten, if not found,
> - * returns -1.
> + * desc. If found, returns 0, res is overwritten, if not found, returns -1.
> * This walks through whole tree and not just first level children
> * until and unless first_level_children_only is true.
> */
> static int find_next_iomem_res(struct resource *res, unsigned long desc,
> - char *name, bool first_level_children_only)
> + bool first_level_children_only)
> {
> resource_size_t start, end;
> struct resource *p;
> @@ -363,8 +362,6 @@ static int find_next_iomem_res(struct resource *res, unsigned long desc,
> continue;
> if ((desc != IORES_DESC_NONE) && (desc != p->desc))
> continue;
> - if (name && strcmp(p->name, name))
> - continue;
> if (p->start > end) {
> p = NULL;
> break;
> @@ -411,7 +408,7 @@ int walk_iomem_res_desc(unsigned long desc, unsigned long flags, u64 start,
> orig_end = res.end;
>
> while ((res.start < res.end) &&
> - (!find_next_iomem_res(&res, desc, NULL, false))) {
> + (!find_next_iomem_res(&res, desc, false))) {
> ret = (*func)(res.start, res.end, arg);
> if (ret)
> break;
> @@ -423,42 +420,6 @@ int walk_iomem_res_desc(unsigned long desc, unsigned long flags, u64 start,
> }
>
> /*
> - * Walks through iomem resources and calls func() with matching resource
> - * ranges. This walks through whole tree and not just first level children.
> - * All the memory ranges which overlap start,end and also match flags and
> - * name are valid candidates.
> - *
> - * @name: name of resource
> - * @flags: resource flags
> - * @start: start addr
> - * @end: end addr
> - *
> - * NOTE: This function is deprecated and should not be used in new code.
> - * Use walk_iomem_res_desc(), instead.
> - */
> -int walk_iomem_res(char *name, unsigned long flags, u64 start, u64 end,
> - void *arg, int (*func)(u64, u64, void *))
> -{
> - struct resource res;
> - u64 orig_end;
> - int ret = -1;
> -
> - res.start = start;
> - res.end = end;
> - res.flags = flags;
> - orig_end = res.end;
> - while ((res.start < res.end) &&
> - (!find_next_iomem_res(&res, IORES_DESC_NONE, name, false))) {
> - ret = (*func)(res.start, res.end, arg);
> - if (ret)
> - break;
> - res.start = res.end + 1;
> - res.end = orig_end;
> - }
> - return ret;
> -}
> -
> -/*
> * This function calls callback against all memory range of System RAM
> * which are marked as IORESOURCE_SYSTEM_RAM and IORESOUCE_BUSY.
> * Now, this function is only for System RAM. This function deals with
> @@ -477,7 +438,7 @@ int walk_system_ram_res(u64 start, u64 end, void *arg,
> res.flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
> orig_end = res.end;
> while ((res.start < res.end) &&
> - (!find_next_iomem_res(&res, IORES_DESC_NONE, NULL, true))) {
> + (!find_next_iomem_res(&res, IORES_DESC_NONE, true))) {
> ret = (*func)(res.start, res.end, arg);
> if (ret)
> break;
> @@ -507,7 +468,7 @@ int walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
> res.flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
> orig_end = res.end;
> while ((res.start < res.end) &&
> - (find_next_iomem_res(&res, IORES_DESC_NONE, NULL, true) >= 0)) {
> + (find_next_iomem_res(&res, IORES_DESC_NONE, true) >= 0)) {
> pfn = (res.start + PAGE_SIZE - 1) >> PAGE_SHIFT;
> end_pfn = (res.end + 1) >> PAGE_SHIFT;
> if (end_pfn > pfn)
Acked-by: Dave Young <dyoung@...hat.com>
Thanks
Dave
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