From da024512a1fa5c979257e442130ee1d468285057 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Fri, 29 Dec 2017 08:53:55 +0100
Subject: [PATCH] mm: pass the vmem_altmap to arch_remove_memory and
__remove_pages
Git-commit: da024512a1fa5c979257e442130ee1d468285057
Patch-mainline: v4.16-rc1
References: bsc#1104888
We can just pass this on instead of having to do a radix tree lookup
without proper locking 2 levels into the callchain.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Jan Kara <jack@suse.cz>
---
arch/ia64/mm/init.c | 4 ++--
arch/powerpc/mm/mem.c | 4 ++--
arch/s390/mm/init.c | 2 +-
arch/sh/mm/init.c | 4 ++--
arch/x86/mm/init_32.c | 4 ++--
arch/x86/mm/init_64.c | 6 ++----
include/linux/memory_hotplug.h | 5 +++--
kernel/memremap.c | 2 +-
mm/hmm.c | 4 ++--
mm/memory_hotplug.c | 8 ++------
10 files changed, 19 insertions(+), 24 deletions(-)
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -662,7 +662,7 @@ int arch_add_memory(int nid, u64 start,
}
#ifdef CONFIG_MEMORY_HOTREMOVE
-int arch_remove_memory(u64 start, u64 size)
+int 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;
@@ -670,7 +670,7 @@ int arch_remove_memory(u64 start, u64 si
int ret;
zone = page_zone(pfn_to_page(start_pfn));
- ret = __remove_pages(zone, start_pfn, nr_pages);
+ ret = __remove_pages(zone, start_pfn, nr_pages, altmap);
if (ret)
pr_warn("%s: Problem encountered in __remove_pages() as"
" ret=%d\n", __func__, ret);
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -148,7 +148,7 @@ int arch_add_memory(int nid, u64 start,
}
#ifdef CONFIG_MEMORY_HOTREMOVE
-int arch_remove_memory(u64 start, u64 size)
+int 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;
@@ -156,7 +156,7 @@ int arch_remove_memory(u64 start, u64 si
int ret;
zone = page_zone(pfn_to_page(start_pfn));
- ret = __remove_pages(zone, start_pfn, nr_pages);
+ ret = __remove_pages(zone, start_pfn, nr_pages, altmap);
if (ret)
return ret;
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -235,7 +235,7 @@ int arch_add_memory(int nid, u64 start,
}
#ifdef CONFIG_MEMORY_HOTREMOVE
-int arch_remove_memory(u64 start, u64 size)
+int arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
{
/*
* There is no hardware or firmware interface which could trigger a
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -510,7 +510,7 @@ EXPORT_SYMBOL_GPL(memory_add_physaddr_to
#endif
#ifdef CONFIG_MEMORY_HOTREMOVE
-int arch_remove_memory(u64 start, u64 size)
+int 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;
@@ -518,7 +518,7 @@ int arch_remove_memory(u64 start, u64 si
int ret;
zone = page_zone(pfn_to_page(start_pfn));
- ret = __remove_pages(zone, start_pfn, nr_pages);
+ ret = __remove_pages(zone, start_pfn, nr_pages, altmap);
if (unlikely(ret))
pr_warn("%s: Failed, __remove_pages() == %d\n", __func__,
ret);
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -839,14 +839,14 @@ int arch_add_memory(int nid, u64 start,
}
#ifdef CONFIG_MEMORY_HOTREMOVE
-int arch_remove_memory(u64 start, u64 size)
+int 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;
struct zone *zone;
zone = page_zone(pfn_to_page(start_pfn));
- return __remove_pages(zone, start_pfn, nr_pages);
+ return __remove_pages(zone, start_pfn, nr_pages, altmap);
}
#endif
#endif
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -1042,21 +1042,19 @@ kernel_physical_mapping_remove(unsigned
remove_pagetable(start, end, true);
}
-int __ref arch_remove_memory(u64 start, u64 size)
+int __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;
struct page *page = pfn_to_page(start_pfn);
- struct vmem_altmap *altmap;
struct zone *zone;
int ret;
/* With altmap the first mapped page is offset from @start */
- altmap = to_vmem_altmap((unsigned long) page);
if (altmap)
page += vmem_altmap_offset(altmap);
zone = page_zone(page);
- ret = __remove_pages(zone, start_pfn, nr_pages);
+ ret = __remove_pages(zone, start_pfn, nr_pages, altmap);
WARN_ON_ONCE(ret);
kernel_physical_mapping_remove(start, start + size);
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -119,9 +119,10 @@ extern bool memhp_auto_online;
#ifdef CONFIG_MEMORY_HOTREMOVE
extern bool is_pageblock_removable_nolock(struct page *page);
-extern int arch_remove_memory(u64 start, u64 size);
+extern int arch_remove_memory(u64 start, u64 size,
+ struct vmem_altmap *altmap);
extern int __remove_pages(struct zone *zone, unsigned long start_pfn,
- unsigned long nr_pages);
+ unsigned long nr_pages, struct vmem_altmap *altmap);
#endif /* CONFIG_MEMORY_HOTREMOVE */
/* reasonably generic interface to expand the physical pages */
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -304,7 +304,7 @@ static void devm_memremap_pages_release(
align_size = ALIGN(resource_size(res), SECTION_SIZE);
mem_hotplug_begin();
- arch_remove_memory(align_start, align_size);
+ arch_remove_memory(align_start, align_size, pgmap->altmap);
mem_hotplug_done();
untrack_pfn(NULL, PHYS_PFN(align_start), align_size);
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -839,10 +839,10 @@ static void hmm_devmem_release(struct de
mem_hotplug_begin();
if (resource->desc == IORES_DESC_DEVICE_PRIVATE_MEMORY)
- __remove_pages(zone, start_pfn, npages);
+ __remove_pages(zone, start_pfn, npages, NULL);
else
arch_remove_memory(start_pfn << PAGE_SHIFT,
- npages << PAGE_SHIFT);
+ npages << PAGE_SHIFT, NULL);
mem_hotplug_done();
hmm_devmem_radix_release(resource);
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -629,7 +629,7 @@ static int __remove_section(struct zone
* calling offline_pages().
*/
int __remove_pages(struct zone *zone, unsigned long phys_start_pfn,
- unsigned long nr_pages)
+ unsigned long nr_pages, struct vmem_altmap *altmap)
{
unsigned long i;
unsigned long map_offset = 0;
@@ -637,10 +637,6 @@ int __remove_pages(struct zone *zone, un
/* In the ZONE_DEVICE case device driver owns the memory region */
if (is_dev_zone(zone)) {
- struct page *page = pfn_to_page(phys_start_pfn);
- struct vmem_altmap *altmap;
-
- altmap = to_vmem_altmap((unsigned long) page);
if (altmap)
map_offset = vmem_altmap_offset(altmap);
} else {
@@ -2041,7 +2037,7 @@ void __ref remove_memory(int nid, u64 st
memblock_free(start, size);
memblock_remove(start, size);
- arch_remove_memory(start, size);
+ arch_remove_memory(start, size, NULL);
try_offline_node(nid);