Re: [PATCH v3 2/7] mm/memory_hotplug: Rename mhp_restrictions to mhp_params

Michal Hocko
2020-03-03T09:50:36Z

On Fri 21-02-20 11:24:58, Logan Gunthorpe wrote:
> The mhp_restrictions struct really doesn't specify anything resembling
> a restriction anymore so rename it to be mhp_params as it is a list
> of extended parameters.
>
> Signed-off-by: Logan Gunthorpe <logang@deltatee.com>

Acked-by: Michal Hocko <mhocko@suse.com>

> ---
> arch/arm64/mm/mmu.c | 4 ++--
> arch/ia64/mm/init.c | 4 ++--
> arch/powerpc/mm/mem.c | 4 ++--
> arch/s390/mm/init.c | 6 +++---
> arch/sh/mm/init.c | 4 ++--
> arch/x86/mm/init_32.c | 4 ++--
> arch/x86/mm/init_64.c | 8 ++++----
> include/linux/memory_hotplug.h | 16 ++++++++--------
> mm/memory_hotplug.c | 8 ++++----
> mm/memremap.c | 8 ++++----
> 10 files changed, 33 insertions(+), 33 deletions(-)
>
> diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
> index 128f70852bf3..ee37bca8aba8 100644
> --- a/arch/arm64/mm/mmu.c
> +++ b/arch/arm64/mm/mmu.c
> @@ -1050,7 +1050,7 @@ int p4d_free_pud_page(p4d_t *p4d, unsigned long addr)
>
> #ifdef CONFIG_MEMORY_HOTPLUG
> int arch_add_memory(int nid, u64 start, u64 size,
> - struct mhp_restrictions *restrictions)
> + struct mhp_params *params)
> {
> int flags = 0;
>
> @@ -1063,7 +1063,7 @@ int arch_add_memory(int nid, u64 start, u64 size,
> memblock_clear_nomap(start, size);
>
> return __add_pages(nid, start >> PAGE_SHIFT, size >> PAGE_SHIFT,
> - restrictions);
> + params);
> }
> void arch_remove_memory(int nid, u64 start, u64 size,
> struct vmem_altmap *altmap)
> diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
> index b01d68a2d5d9..97bbc23ea1e3 100644
> --- a/arch/ia64/mm/init.c
> +++ b/arch/ia64/mm/init.c
> @@ -670,13 +670,13 @@ mem_init (void)
>
> #ifdef CONFIG_MEMORY_HOTPLUG
> int arch_add_memory(int nid, u64 start, u64 size,
> - struct mhp_restrictions *restrictions)
> + struct mhp_params *params)
> {
> unsigned long start_pfn = start >> PAGE_SHIFT;
> unsigned long nr_pages = size >> PAGE_SHIFT;
> int ret;
>
> - ret = __add_pages(nid, start_pfn, nr_pages, restrictions);
> + ret = __add_pages(nid, start_pfn, nr_pages, params);
> if (ret)
> printk("%s: Problem encountered in __add_pages() as ret=%d\n",
> __func__, ret);
> diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
> index ef7b1119b2e2..b4bece53bec0 100644
> --- a/arch/powerpc/mm/mem.c
> +++ b/arch/powerpc/mm/mem.c
> @@ -128,7 +128,7 @@ static void flush_dcache_range_chunked(unsigned long start, unsigned long stop,
> }
>
> int __ref arch_add_memory(int nid, u64 start, u64 size,
> - struct mhp_restrictions *restrictions)
> + struct mhp_params *params)
> {
> unsigned long start_pfn = start >> PAGE_SHIFT;
> unsigned long nr_pages = size >> PAGE_SHIFT;
> @@ -144,7 +144,7 @@ int __ref arch_add_memory(int nid, u64 start, u64 size,
> return -EFAULT;
> }
>
> - return __add_pages(nid, start_pfn, nr_pages, restrictions);
> + return __add_pages(nid, start_pfn, nr_pages, params);
> }
>
> void __ref arch_remove_memory(int nid, u64 start, u64 size,
> diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
> index ac44bd76db4b..e9e4a7abd0cc 100644
> --- a/arch/s390/mm/init.c
> +++ b/arch/s390/mm/init.c
> @@ -268,20 +268,20 @@ device_initcall(s390_cma_mem_init);
> #endif /* CONFIG_CMA */
>
> int arch_add_memory(int nid, u64 start, u64 size,
> - struct mhp_restrictions *restrictions)
> + struct mhp_params *params)
> {
> unsigned long start_pfn = PFN_DOWN(start);
> unsigned long size_pages = PFN_DOWN(size);
> int rc;
>
> - if (WARN_ON_ONCE(restrictions->altmap))
> + if (WARN_ON_ONCE(params->altmap))
> return -EINVAL;
>
> rc = vmem_add_mapping(start, size);
> if (rc)
> return rc;
>
> - rc = __add_pages(nid, start_pfn, size_pages, restrictions);
> + rc = __add_pages(nid, start_pfn, size_pages, params);
> if (rc)
> vmem_remove_mapping(start, size);
> return rc;
> diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
> index d1b1ff2be17a..e5114c053364 100644
> --- a/arch/sh/mm/init.c
> +++ b/arch/sh/mm/init.c
> @@ -406,14 +406,14 @@ void __init mem_init(void)
>
> #ifdef CONFIG_MEMORY_HOTPLUG
> int arch_add_memory(int nid, u64 start, u64 size,
> - struct mhp_restrictions *restrictions)
> + struct mhp_params *params)
> {
> unsigned long start_pfn = PFN_DOWN(start);
> unsigned long nr_pages = size >> PAGE_SHIFT;
> int ret;
>
> /* We only have ZONE_NORMAL, so this is easy.. */
> - ret = __add_pages(nid, start_pfn, nr_pages, restrictions);
> + ret = __add_pages(nid, start_pfn, nr_pages, params);
> if (unlikely(ret))
> printk("%s: Failed, __add_pages() == %d\n", __func__, ret);
>
> diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
> index 23df4885bbed..3ec3dac7c268 100644
> --- a/arch/x86/mm/init_32.c
> +++ b/arch/x86/mm/init_32.c
> @@ -853,12 +853,12 @@ void __init mem_init(void)
>
> #ifdef CONFIG_MEMORY_HOTPLUG
> int arch_add_memory(int nid, u64 start, u64 size,
> - struct mhp_restrictions *restrictions)
> + struct mhp_params *params)
> {
> unsigned long start_pfn = start >> PAGE_SHIFT;
> unsigned long nr_pages = size >> PAGE_SHIFT;
>
> - return __add_pages(nid, start_pfn, nr_pages, restrictions);
> + return __add_pages(nid, start_pfn, nr_pages, params);
> }
>
> void arch_remove_memory(int nid, u64 start, u64 size,
> diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
> index abbdecb75fad..87977a8bfbbf 100644
> --- a/arch/x86/mm/init_64.c
> +++ b/arch/x86/mm/init_64.c
> @@ -844,11 +844,11 @@ static void update_end_of_memory_vars(u64 start, u64 size)
> }
>
> int add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages,
> - struct mhp_restrictions *restrictions)
> + struct mhp_params *params)
> {
> int ret;
>
> - ret = __add_pages(nid, start_pfn, nr_pages, restrictions);
> + ret = __add_pages(nid, start_pfn, nr_pages, params);
> WARN_ON_ONCE(ret);
>
> /* update max_pfn, max_low_pfn and high_memory */
> @@ -859,14 +859,14 @@ int add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages,
> }
>
> int arch_add_memory(int nid, u64 start, u64 size,
> - struct mhp_restrictions *restrictions)
> + struct mhp_params *params)
> {
> unsigned long start_pfn = start >> PAGE_SHIFT;
> unsigned long nr_pages = size >> PAGE_SHIFT;
>
> init_memory_mapping(start, start + size);
>
> - return add_pages(nid, start_pfn, nr_pages, restrictions);
> + return add_pages(nid, start_pfn, nr_pages, params);
> }
>
> #define PAGE_INUSE 0xFD
> diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
> index 69ff3037528d..c5df1b3dada0 100644
> --- a/include/linux/memory_hotplug.h
> +++ b/include/linux/memory_hotplug.h
> @@ -54,10 +54,10 @@ enum {
> };
>
> /*
> - * Restrictions for the memory hotplug:
> - * altmap: alternative allocator for memmap array
> + * Extended parameters for memory hotplug:
> + * altmap: alternative allocator for memmap array (optional)
> */
> -struct mhp_restrictions {
> +struct mhp_params {
> struct vmem_altmap *altmap;
> };
>
> @@ -108,7 +108,7 @@ extern int restore_online_page_callback(online_page_callback_t callback);
> extern int try_online_node(int nid);
>
> extern int arch_add_memory(int nid, u64 start, u64 size,
> - struct mhp_restrictions *restrictions);
> + struct mhp_params *params);
> extern u64 max_mem_size;
>
> extern bool memhp_auto_online;
> @@ -126,17 +126,17 @@ extern void __remove_pages(unsigned long start_pfn, unsigned long nr_pages,
>
> /* reasonably generic interface to expand the physical pages */
> extern int __add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages,
> - struct mhp_restrictions *restrictions);
> + struct mhp_params *params);
>
> #ifndef CONFIG_ARCH_HAS_ADD_PAGES
> static inline int add_pages(int nid, unsigned long start_pfn,
> - unsigned long nr_pages, struct mhp_restrictions *restrictions)
> + unsigned long nr_pages, struct mhp_params *params)
> {
> - return __add_pages(nid, start_pfn, nr_pages, restrictions);
> + return __add_pages(nid, start_pfn, nr_pages, params);
> }
> #else /* ARCH_HAS_ADD_PAGES */
> int add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages,
> - struct mhp_restrictions *restrictions);
> + struct mhp_params *params);
> #endif /* ARCH_HAS_ADD_PAGES */
>
> #ifdef CONFIG_NUMA
> diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
> index 0a54ffac8c68..c69469e1b40e 100644
> --- a/mm/memory_hotplug.c
> +++ b/mm/memory_hotplug.c
> @@ -299,11 +299,11 @@ static int check_hotplug_memory_addressable(unsigned long pfn,
> * add the new pages.
> */
> int __ref __add_pages(int nid, unsigned long pfn, unsigned long nr_pages,
> - struct mhp_restrictions *restrictions)
> + struct mhp_params *params)
> {
> int err;
> unsigned long nr, start_sec, end_sec;
> - struct vmem_altmap *altmap = restrictions->altmap;
> + struct vmem_altmap *altmap = params->altmap;
>
> err = check_hotplug_memory_addressable(pfn, nr_pages);
> if (err)
> @@ -993,7 +993,7 @@ static int online_memory_block(struct memory_block *mem, void *arg)
> */
> int __ref add_memory_resource(int nid, struct resource *res)
> {
> - struct mhp_restrictions restrictions = {};
> + struct mhp_params params = {};
> u64 start, size;
> bool new_node = false;
> int ret;
> @@ -1021,7 +1021,7 @@ int __ref add_memory_resource(int nid, struct resource *res)
> new_node = ret;
>
> /* call arch's memory hotadd */
> - ret = arch_add_memory(nid, start, size, &restrictions);
> + ret = arch_add_memory(nid, start, size, &params);
> if (ret < 0)
> goto error;
>
> diff --git a/mm/memremap.c b/mm/memremap.c
> index 09b5b7adc773..6891a503a078 100644
> --- a/mm/memremap.c
> +++ b/mm/memremap.c
> @@ -161,7 +161,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
> {
> struct resource *res = &pgmap->res;
> struct dev_pagemap *conflict_pgmap;
> - struct mhp_restrictions restrictions = {
> + struct mhp_params params = {
> /*
> * We do not want any optional features only our own memmap
> */
> @@ -275,7 +275,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
> */
> if (pgmap->type == MEMORY_DEVICE_PRIVATE) {
> error = add_pages(nid, PHYS_PFN(res->start),
> - PHYS_PFN(resource_size(res)), &restrictions);
> + PHYS_PFN(resource_size(res)), &params);
> } else {
> error = kasan_add_zero_shadow(__va(res->start), resource_size(res));
> if (error) {
> @@ -284,7 +284,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
> }
>
> error = arch_add_memory(nid, res->start, resource_size(res),
> - &restrictions);
> + &params);
> }
>
> if (!error) {
> @@ -292,7 +292,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
>
> zone = &NODE_DATA(nid)->node_zones[ZONE_DEVICE];
> move_pfn_range_to_zone(zone, PHYS_PFN(res->start),
> - PHYS_PFN(resource_size(res)), restrictions.altmap);
> + PHYS_PFN(resource_size(res)), params.altmap);
> }
>
> mem_hotplug_done();
> --
> 2.20.1

--
Michal Hocko
SUSE Labs