[PATCH v1 04/12] mm/memory_hotplug: remove nid parameter from arch_remove_memory()

[David Hildenbrand]

The parameter is unused, let's remove it.

Cc: Catalin Marinas <***@arm.com>
Cc: Will Deacon <***@kernel.org>
Cc: Michael Ellerman <***@ellerman.id.au>
Cc: Benjamin Herrenschmidt <***@kernel.crashing.org>
Cc: Paul Mackerras <***@samba.org>
Cc: Heiko Carstens <***@linux.ibm.com>
Cc: Vasily Gorbik <***@linux.ibm.com>
Cc: Christian Borntraeger <***@de.ibm.com>
Cc: Yoshinori Sato <***@users.sourceforge.jp>
Cc: Rich Felker <***@libc.org>
Cc: Dave Hansen <***@linux.intel.com>
Cc: Andy Lutomirski <***@kernel.org>
Cc: Peter Zijlstra <***@infradead.org>
Cc: Thomas Gleixner <***@linutronix.de>
Cc: Ingo Molnar <***@redhat.com>
Cc: Borislav Petkov <***@alien8.de>
Cc: ***@kernel.org
Cc: "H. Peter Anvin" <***@zytor.com>
Cc: Andrew Morton <***@linux-foundation.org>
Cc: Anshuman Khandual <***@arm.com>
Cc: Ard Biesheuvel <***@kernel.org>
Cc: Mike Rapoport <***@kernel.org>
Cc: Nicholas Piggin <***@gmail.com>
Cc: Pavel Tatashin <***@soleen.com>
Cc: Baoquan He <***@redhat.com>
Cc: Laurent Dufour <***@linux.ibm.com>
Cc: Sergei Trofimovich <***@gentoo.org>
Cc: Kefeng Wang <***@huawei.com>
Cc: Michel Lespinasse <***@lespinasse.org>
Cc: Christophe Leroy <***@c-s.fr>
Cc: "Aneesh Kumar K.V" <***@linux.ibm.com>
Cc: Thiago Jung Bauermann <***@linux.ibm.com>
Cc: Joe Perches <***@perches.com>
Cc: Pierre Morel <***@linux.ibm.com>
Cc: Jia He <***@arm.com>
Cc: linux-arm-***@lists.infradead.org
Cc: linux-***@vger.kernel.org
Cc: linuxppc-***@lists.ozlabs.org
Cc: linux-***@vger.kernel.org
Cc: linux-***@vger.kernel.org
Signed-off-by: David Hildenbrand <***@redhat.com>
---
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 89b66ef43a0f..c7821013f551 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -1502,8 +1502,7 @@ 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 043bbeaf407c..fc5c36189c26 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -115,8 +115,7 @@ 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 168d7d4dd735..d74daf68e59e 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 21ffb03f6c72..5e82aafb5b49 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 e527d829e1ed..d0296c081607 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -1254,8 +1254,7 @@ 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 571734fd95bd..1d8d09c029c9 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -142,8 +142,7 @@ 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 7206787ac5a9..f9be66bbd847 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1431,7 +1431,7 @@ 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;
}

@@ -2211,7 +2211,7 @@ 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));
}

[David Hildenbrand]

There is only a single user remaining. We can simply try to offline all
online nodes - which is fast, because we usually span pages and can skip
such nodes right away.

Cc: Michael Ellerman <***@ellerman.id.au>
Cc: Benjamin Herrenschmidt <***@kernel.crashing.org>
Cc: Paul Mackerras <***@samba.org>
Cc: "Rafael J. Wysocki" <***@rjwysocki.net>
Cc: Len Brown <***@kernel.org>
Cc: Dan Williams <***@intel.com>
Cc: Vishal Verma <***@intel.com>
Cc: Dave Jiang <***@intel.com>
Cc: "Michael S. Tsirkin" <***@redhat.com>
Cc: Jason Wang <***@redhat.com>
Cc: Andrew Morton <***@linux-foundation.org>
Cc: Nathan Lynch <***@linux.ibm.com>
Cc: Laurent Dufour <***@linux.ibm.com>
Cc: "Aneesh Kumar K.V" <***@linux.ibm.com>
Cc: Scott Cheloha <***@linux.ibm.com>
Cc: Anton Blanchard <***@ozlabs.org>
Cc: linuxppc-***@lists.ozlabs.org
Cc: linux-***@vger.kernel.org
Cc: ***@lists.linux.dev
Signed-off-by: David Hildenbrand <***@redhat.com>
---
.../platforms/pseries/hotplug-memory.c | 9 ++++-----
drivers/acpi/acpi_memhotplug.c | 7 +------
drivers/dax/kmem.c | 3 +--
drivers/virtio/virtio_mem.c | 4 ++--
include/linux/memory_hotplug.h | 10 +++++-----
mm/memory_hotplug.c | 20 +++++++++----------
6 files changed, 23 insertions(+), 30 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c
index 8377f1f7c78e..4a9232ddbefe 100644
--- a/arch/powerpc/platforms/pseries/hotplug-memory.c
+++ b/arch/powerpc/platforms/pseries/hotplug-memory.c
@@ -286,7 +286,7 @@ static int pseries_remove_memblock(unsigned long base, unsigned long memblock_si
{
unsigned long block_sz, start_pfn;
int sections_per_block;
- int i, nid;
+ int i;

start_pfn = base >> PAGE_SHIFT;

@@ -297,10 +297,9 @@ static int pseries_remove_memblock(unsigned long base, unsigned long memblock_si

block_sz = pseries_memory_block_size();
sections_per_block = block_sz / MIN_MEMORY_BLOCK_SIZE;
- nid = memory_add_physaddr_to_nid(base);

for (i = 0; i < sections_per_block; i++) {
- __remove_memory(nid, base, MIN_MEMORY_BLOCK_SIZE);
+ __remove_memory(base, MIN_MEMORY_BLOCK_SIZE);
base += MIN_MEMORY_BLOCK_SIZE;
}

@@ -386,7 +385,7 @@ static int dlpar_remove_lmb(struct drmem_lmb *lmb)

block_sz = pseries_memory_block_size();

- __remove_memory(mem_block->nid, lmb->base_addr, block_sz);
+ __remove_memory(lmb->base_addr, block_sz);
put_device(&mem_block->dev);

/* Update memory regions for memory remove */
@@ -638,7 +637,7 @@ static int dlpar_add_lmb(struct drmem_lmb *lmb)

rc = dlpar_online_lmb(lmb);
if (rc) {
- __remove_memory(nid, lmb->base_addr, block_sz);
+ __remove_memory(lmb->base_addr, block_sz);
invalidate_lmb_associativity_index(lmb);
} else {
lmb->flags |= DRCONF_MEM_ASSIGNED;
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 8cc195c4c861..1d01d9414c40 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -239,19 +239,14 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)

static void acpi_memory_remove_memory(struct acpi_memory_device *mem_device)
{
- acpi_handle handle = mem_device->device->handle;
struct acpi_memory_info *info, *n;
- int nid = acpi_get_node(handle);

list_for_each_entry_safe(info, n, &mem_device->res_list, list) {
if (!info->enabled)
continue;

- if (nid == NUMA_NO_NODE)
- nid = memory_add_physaddr_to_nid(info->start_addr);
-
acpi_unbind_memory_blocks(info);
- __remove_memory(nid, info->start_addr, info->length);
+ __remove_memory(info->start_addr, info->length);
list_del(&info->list);
kfree(info);
}
diff --git a/drivers/dax/kmem.c b/drivers/dax/kmem.c
index ac231cc36359..99e0f60c4c26 100644
--- a/drivers/dax/kmem.c
+++ b/drivers/dax/kmem.c
@@ -156,8 +156,7 @@ static void dev_dax_kmem_remove(struct dev_dax *dev_dax)
if (rc)
continue;

- rc = remove_memory(dev_dax->target_node, range.start,
- range_len(&range));
+ rc = remove_memory(range.start, range_len(&range));
if (rc == 0) {
release_resource(data->res[i]);
kfree(data->res[i]);
diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
index 10ec60d81e84..e327fb878143 100644
--- a/drivers/virtio/virtio_mem.c
+++ b/drivers/virtio/virtio_mem.c
@@ -673,7 +673,7 @@ static int virtio_mem_remove_memory(struct virtio_mem *vm, uint64_t addr,

dev_dbg(&vm->vdev->dev, "removing memory: 0x%llx - 0x%llx\n", addr,
addr + size - 1);
- rc = remove_memory(vm->nid, addr, size);
+ rc = remove_memory(addr, size);
if (!rc) {
atomic64_sub(size, &vm->offline_size);
/*
@@ -728,7 +728,7 @@ static int virtio_mem_offline_and_remove_memory(struct virtio_mem *vm,
"offlining and removing memory: 0x%llx - 0x%llx\n", addr,
addr + size - 1);

- rc = offline_and_remove_memory(vm->nid, addr, size);
+ rc = offline_and_remove_memory(addr, size);
if (!rc) {
atomic64_sub(size, &vm->offline_size);
/*
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 1d8d09c029c9..84f05435e2ae 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -319,9 +319,9 @@ static inline void pgdat_resize_init(struct pglist_data *pgdat) {}

extern void try_offline_node(int nid);
extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages);
-extern int remove_memory(int nid, u64 start, u64 size);
-extern void __remove_memory(int nid, u64 start, u64 size);
-extern int offline_and_remove_memory(int nid, u64 start, u64 size);
+extern int remove_memory(u64 start, u64 size);
+extern void __remove_memory(u64 start, u64 size);
+extern int offline_and_remove_memory(u64 start, u64 size);

#else
static inline void try_offline_node(int nid) {}
@@ -331,12 +331,12 @@ static inline int offline_pages(unsigned long start_pfn, unsigned long nr_pages)
return -EINVAL;
}

-static inline int remove_memory(int nid, u64 start, u64 size)
+static inline int remove_memory(u64 start, u64 size)
{
return -EBUSY;
}

-static inline void __remove_memory(int nid, u64 start, u64 size) {}
+static inline void __remove_memory(u64 start, u64 size) {}
#endif /* CONFIG_MEMORY_HOTREMOVE */

extern void set_zone_contiguous(struct zone *zone);
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index f9be66bbd847..9cae42636f3e 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -2157,9 +2157,9 @@ void try_offline_node(int nid)
}
EXPORT_SYMBOL(try_offline_node);

-static int __ref try_remove_memory(int nid, u64 start, u64 size)
+static int __ref try_remove_memory(u64 start, u64 size)
{
- int rc = 0;
+ int rc = 0, nid;
struct vmem_altmap mhp_altmap = {};
struct vmem_altmap *altmap = NULL;
unsigned long nr_vmemmap_pages;
@@ -2220,7 +2220,8 @@ static int __ref try_remove_memory(int nid, u64 start, u64 size)

release_mem_region_adjustable(start, size);

- try_offline_node(nid);
+ for_each_online_node(nid)
+ try_offline_node(nid);

mem_hotplug_done();
return 0;
@@ -2228,7 +2229,6 @@ static int __ref try_remove_memory(int nid, u64 start, u64 size)

/**
* remove_memory
- * @nid: the node ID
* @start: physical address of the region to remove
* @size: size of the region to remove
*
@@ -2236,14 +2236,14 @@ static int __ref try_remove_memory(int nid, u64 start, u64 size)
* and online/offline operations before this call, as required by
* try_offline_node().
*/
-void __remove_memory(int nid, u64 start, u64 size)
+void __remove_memory(u64 start, u64 size)
{

/*
* trigger BUG() if some memory is not offlined prior to calling this
* function
*/
- if (try_remove_memory(nid, start, size))
+ if (try_remove_memory(start, size))
BUG();
}

@@ -2251,12 +2251,12 @@ void __remove_memory(int nid, u64 start, u64 size)
* Remove memory if every memory block is offline, otherwise return -EBUSY is
* some memory is not offline
*/
-int remove_memory(int nid, u64 start, u64 size)
+int remove_memory(u64 start, u64 size)
{
int rc;

lock_device_hotplug();
- rc = try_remove_memory(nid, start, size);
+ rc = try_remove_memory(start, size);
unlock_device_hotplug();

return rc;
@@ -2316,7 +2316,7 @@ static int try_reonline_memory_block(struct memory_block *mem, void *arg)
* unplugged all memory (so it's no longer in use) and want to offline + remove
* that memory.
*/
-int offline_and_remove_memory(int nid, u64 start, u64 size)
+int offline_and_remove_memory(u64 start, u64 size)
{
const unsigned long mb_count = size / memory_block_size_bytes();
uint8_t *online_types, *tmp;
@@ -2352,7 +2352,7 @@ int offline_and_remove_memory(int nid, u64 start, u64 size)
* This cannot fail as it cannot get onlined in the meantime.
*/
if (!rc) {
- rc = try_remove_memory(nid, start, size);
+ rc = try_remove_memory(start, size);
if (rc)
pr_err("%s: Failed to remove memory: %d", __func__, rc);
}