Re: [PATCH v1 2/4] mm/memory_hotplug: remove nid parameter from arch_remove_memory()
From: Pankaj Gupta
Date: Wed Jul 14 2021 - 16:47:55 EST
> The parameter is unused, let's remove it.
>
> Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>
> Acked-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> (powerpc)
> Acked-by: Heiko Carstens <hca@xxxxxxxxxxxxx> (s390)
> Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
> Cc: Will Deacon <will@xxxxxxxxxx>
> Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
> Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
> Cc: Paul Mackerras <paulus@xxxxxxxxx>
> Cc: Heiko Carstens <hca@xxxxxxxxxxxxx>
> Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
> Cc: Christian Borntraeger <borntraeger@xxxxxxxxxx>
> Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
> Cc: Rich Felker <dalias@xxxxxxxx>
> Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
> Cc: Andy Lutomirski <luto@xxxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxxxx>
> Cc: x86@xxxxxxxxxx
> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Anshuman Khandual <anshuman.khandual@xxxxxxx>
> Cc: Ard Biesheuvel <ardb@xxxxxxxxxx>
> Cc: Mike Rapoport <rppt@xxxxxxxxxx>
> Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
> Cc: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
> Cc: Baoquan He <bhe@xxxxxxxxxx>
> Cc: Laurent Dufour <ldufour@xxxxxxxxxxxxx>
> Cc: Sergei Trofimovich <slyfox@xxxxxxxxxx>
> Cc: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
> Cc: Michel Lespinasse <michel@xxxxxxxxxxxxxx>
> Cc: Christophe Leroy <christophe.leroy@xxxxxx>
> Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx>
> Cc: Thiago Jung Bauermann <bauerman@xxxxxxxxxxxxx>
> Cc: Joe Perches <joe@xxxxxxxxxxx>
> Cc: Pierre Morel <pmorel@xxxxxxxxxxxxx>
> Cc: Jia He <justin.he@xxxxxxx>
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: linux-ia64@xxxxxxxxxxxxxxx
> Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
> Cc: linux-s390@xxxxxxxxxxxxxxx
> Cc: linux-sh@xxxxxxxxxxxxxxx
> Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
> ---
> arch/arm64/mm/mmu.c | 3 +--
> arch/ia64/mm/init.c | 3 +--
> arch/powerpc/mm/mem.c | 3 +--
> arch/s390/mm/init.c | 3 +--
> arch/sh/mm/init.c | 3 +--
> arch/x86/mm/init_32.c | 3 +--
> arch/x86/mm/init_64.c | 3 +--
> include/linux/memory_hotplug.h | 3 +--
> mm/memory_hotplug.c | 4 ++--
> mm/memremap.c | 5 +----
> 10 files changed, 11 insertions(+), 22 deletions(-)
>
> diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
> index d74586508448..af8ab553a268 100644
> --- a/arch/arm64/mm/mmu.c
> +++ b/arch/arm64/mm/mmu.c
> @@ -1506,8 +1506,7 @@ int arch_add_memory(int nid, u64 start, u64 size,
> return ret;
> }
>
> -void arch_remove_memory(int nid, u64 start, u64 size,
> - struct vmem_altmap *altmap)
> +void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
> {
> unsigned long start_pfn = start >> PAGE_SHIFT;
> unsigned long nr_pages = size >> PAGE_SHIFT;
> diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
> index 064a967a7b6e..5c6da8d83c1a 100644
> --- a/arch/ia64/mm/init.c
> +++ b/arch/ia64/mm/init.c
> @@ -484,8 +484,7 @@ int arch_add_memory(int nid, u64 start, u64 size,
> return ret;
> }
>
> -void arch_remove_memory(int nid, u64 start, u64 size,
> - struct vmem_altmap *altmap)
> +void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
> {
> unsigned long start_pfn = start >> PAGE_SHIFT;
> unsigned long nr_pages = size >> PAGE_SHIFT;
> diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
> index ad198b439222..c3c4e31462ec 100644
> --- a/arch/powerpc/mm/mem.c
> +++ b/arch/powerpc/mm/mem.c
> @@ -119,8 +119,7 @@ int __ref arch_add_memory(int nid, u64 start, u64 size,
> return rc;
> }
>
> -void __ref arch_remove_memory(int nid, u64 start, u64 size,
> - struct vmem_altmap *altmap)
> +void __ref arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
> {
> unsigned long start_pfn = start >> PAGE_SHIFT;
> unsigned long nr_pages = size >> PAGE_SHIFT;
> diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
> index 8ac710de1ab1..d85bd7f5d8dc 100644
> --- a/arch/s390/mm/init.c
> +++ b/arch/s390/mm/init.c
> @@ -306,8 +306,7 @@ int arch_add_memory(int nid, u64 start, u64 size,
> return rc;
> }
>
> -void arch_remove_memory(int nid, u64 start, u64 size,
> - struct vmem_altmap *altmap)
> +void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
> {
> unsigned long start_pfn = start >> PAGE_SHIFT;
> unsigned long nr_pages = size >> PAGE_SHIFT;
> diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
> index ce26c7f8950a..506784702430 100644
> --- a/arch/sh/mm/init.c
> +++ b/arch/sh/mm/init.c
> @@ -414,8 +414,7 @@ int arch_add_memory(int nid, u64 start, u64 size,
> return ret;
> }
>
> -void arch_remove_memory(int nid, u64 start, u64 size,
> - struct vmem_altmap *altmap)
> +void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
> {
> unsigned long start_pfn = PFN_DOWN(start);
> unsigned long nr_pages = size >> PAGE_SHIFT;
> diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
> index 74b78840182d..bd90b8fe81e4 100644
> --- a/arch/x86/mm/init_32.c
> +++ b/arch/x86/mm/init_32.c
> @@ -801,8 +801,7 @@ int arch_add_memory(int nid, u64 start, u64 size,
> return __add_pages(nid, start_pfn, nr_pages, params);
> }
>
> -void arch_remove_memory(int nid, u64 start, u64 size,
> - struct vmem_altmap *altmap)
> +void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
> {
> unsigned long start_pfn = start >> PAGE_SHIFT;
> unsigned long nr_pages = size >> PAGE_SHIFT;
> diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
> index ddeaba947eb3..a6e11763763f 100644
> --- a/arch/x86/mm/init_64.c
> +++ b/arch/x86/mm/init_64.c
> @@ -1255,8 +1255,7 @@ kernel_physical_mapping_remove(unsigned long start, unsigned long end)
> remove_pagetable(start, end, true, NULL);
> }
>
> -void __ref arch_remove_memory(int nid, u64 start, u64 size,
> - struct vmem_altmap *altmap)
> +void __ref arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
> {
> unsigned long start_pfn = start >> PAGE_SHIFT;
> unsigned long nr_pages = size >> PAGE_SHIFT;
> diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
> index d01b504ce06f..010a192298b5 100644
> --- a/include/linux/memory_hotplug.h
> +++ b/include/linux/memory_hotplug.h
> @@ -130,8 +130,7 @@ static inline bool movable_node_is_enabled(void)
> return movable_node_enabled;
> }
>
> -extern void arch_remove_memory(int nid, u64 start, u64 size,
> - struct vmem_altmap *altmap);
> +extern void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap);
> extern void __remove_pages(unsigned long start_pfn, unsigned long nr_pages,
> struct vmem_altmap *altmap);
>
> diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
> index 93b3abaf9828..f2a9af3af184 100644
> --- a/mm/memory_hotplug.c
> +++ b/mm/memory_hotplug.c
> @@ -1106,7 +1106,7 @@ int __ref add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags)
> /* create memory block devices after memory was added */
> ret = create_memory_block_devices(start, size, mhp_altmap.alloc);
> if (ret) {
> - arch_remove_memory(nid, start, size, NULL);
> + arch_remove_memory(start, size, NULL);
> goto error;
> }
>
> @@ -1892,7 +1892,7 @@ static int __ref try_remove_memory(int nid, u64 start, u64 size)
>
> mem_hotplug_begin();
>
> - arch_remove_memory(nid, start, size, altmap);
> + arch_remove_memory(start, size, altmap);
>
> if (IS_ENABLED(CONFIG_ARCH_KEEP_MEMBLOCK)) {
> memblock_free(start, size);
> diff --git a/mm/memremap.c b/mm/memremap.c
> index 15a074ffb8d7..ed593bf87109 100644
> --- a/mm/memremap.c
> +++ b/mm/memremap.c
> @@ -140,14 +140,11 @@ static void pageunmap_range(struct dev_pagemap *pgmap, int range_id)
> {
> struct range *range = &pgmap->ranges[range_id];
> struct page *first_page;
> - int nid;
>
> /* make sure to access a memmap that was actually initialized */
> first_page = pfn_to_page(pfn_first(pgmap, range_id));
>
> /* pages are dead and unused, undo the arch mapping */
> - nid = page_to_nid(first_page);
> -
> mem_hotplug_begin();
> remove_pfn_range_from_zone(page_zone(first_page), PHYS_PFN(range->start),
> PHYS_PFN(range_len(range)));
> @@ -155,7 +152,7 @@ static void pageunmap_range(struct dev_pagemap *pgmap, int range_id)
> __remove_pages(PHYS_PFN(range->start),
> PHYS_PFN(range_len(range)), NULL);
> } else {
> - arch_remove_memory(nid, range->start, range_len(range),
> + arch_remove_memory(range->start, range_len(range),
> pgmap_altmap(pgmap));
> kasan_remove_zero_shadow(__va(range->start), range_len(range));
> }
Reviewed-by: Pankaj Gupta <pankaj.gupta@xxxxxxxxx>