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authorMichal Hocko <mhocko@suse.com>2018-04-10 16:30:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-04-11 10:28:32 -0700
commit666feb21a0083e5b29ddd96588553ffa0cc357b6 (patch)
tree2b470bb99e3fdf84b1df32ffe726adb0119084e5
parenta49bd4d7163707de377aee062f17befef6da891b (diff)
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mm, migrate: remove reason argument from new_page_t
No allocation callback is using this argument anymore. new_page_node used to use this parameter to convey node_id resp. migration error up to move_pages code (do_move_page_to_node_array). The error status never made it into the final status field and we have a better way to communicate node id to the status field now. All other allocation callbacks simply ignored the argument so we can drop it finally. [mhocko@suse.com: fix migration callback] Link: http://lkml.kernel.org/r/20180105085259.GH2801@dhcp22.suse.cz [akpm@linux-foundation.org: fix alloc_misplaced_dst_page()] [mhocko@kernel.org: fix build] Link: http://lkml.kernel.org/r/20180103091134.GB11319@dhcp22.suse.cz Link: http://lkml.kernel.org/r/20180103082555.14592-3-mhocko@kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Zi Yan <zi.yan@cs.rutgers.edu> Cc: Andrea Reale <ar@linux.vnet.ibm.com> Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/powerpc/mm/mmu_context_iommu.c3
-rw-r--r--include/linux/migrate.h3
-rw-r--r--include/linux/page-isolation.h3
-rw-r--r--mm/compaction.c3
-rw-r--r--mm/internal.h2
-rw-r--r--mm/memory-failure.c2
-rw-r--r--mm/memory_hotplug.c3
-rw-r--r--mm/mempolicy.c6
-rw-r--r--mm/migrate.c21
-rw-r--r--mm/page_isolation.c3
10 files changed, 14 insertions, 35 deletions
diff --git a/arch/powerpc/mm/mmu_context_iommu.c b/arch/powerpc/mm/mmu_context_iommu.c
index 9a8a084e4aba..4c615fcb0cf0 100644
--- a/arch/powerpc/mm/mmu_context_iommu.c
+++ b/arch/powerpc/mm/mmu_context_iommu.c
@@ -75,8 +75,7 @@ EXPORT_SYMBOL_GPL(mm_iommu_preregistered);
/*
* Taken from alloc_migrate_target with changes to remove CMA allocations
*/
-struct page *new_iommu_non_cma_page(struct page *page, unsigned long private,
- int **resultp)
+struct page *new_iommu_non_cma_page(struct page *page, unsigned long private)
{
gfp_t gfp_mask = GFP_USER;
struct page *new_page;
diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index ab45f8a0d288..e0393240bf64 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -7,8 +7,7 @@
#include <linux/migrate_mode.h>
#include <linux/hugetlb.h>
-typedef struct page *new_page_t(struct page *page, unsigned long private,
- int **reason);
+typedef struct page *new_page_t(struct page *page, unsigned long private);
typedef void free_page_t(struct page *page, unsigned long private);
/*
diff --git a/include/linux/page-isolation.h b/include/linux/page-isolation.h
index cdad58bbfd8b..4ae347cbc36d 100644
--- a/include/linux/page-isolation.h
+++ b/include/linux/page-isolation.h
@@ -63,7 +63,6 @@ undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
bool skip_hwpoisoned_pages);
-struct page *alloc_migrate_target(struct page *page, unsigned long private,
- int **resultp);
+struct page *alloc_migrate_target(struct page *page, unsigned long private);
#endif
diff --git a/mm/compaction.c b/mm/compaction.c
index 88d01a50a015..29bd1df18b98 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1166,8 +1166,7 @@ static void isolate_freepages(struct compact_control *cc)
* from the isolated freelists in the block we are migrating to.
*/
static struct page *compaction_alloc(struct page *migratepage,
- unsigned long data,
- int **result)
+ unsigned long data)
{
struct compact_control *cc = (struct compact_control *)data;
struct page *freepage;
diff --git a/mm/internal.h b/mm/internal.h
index 1a1bb5d59c15..502d14189794 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -538,5 +538,5 @@ static inline bool is_migrate_highatomic_page(struct page *page)
}
void setup_zone_pageset(struct zone *zone);
-extern struct page *alloc_new_node_page(struct page *page, unsigned long node, int **x);
+extern struct page *alloc_new_node_page(struct page *page, unsigned long node);
#endif /* __MM_INTERNAL_H */
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 2d4bf647cf01..9d142b9b86dc 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1487,7 +1487,7 @@ int unpoison_memory(unsigned long pfn)
}
EXPORT_SYMBOL(unpoison_memory);
-static struct page *new_page(struct page *p, unsigned long private, int **x)
+static struct page *new_page(struct page *p, unsigned long private)
{
int nid = page_to_nid(p);
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index cc6dfa5832ca..ec028494519c 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1329,8 +1329,7 @@ static unsigned long scan_movable_pages(unsigned long start, unsigned long end)
return 0;
}
-static struct page *new_node_page(struct page *page, unsigned long private,
- int **result)
+static struct page *new_node_page(struct page *page, unsigned long private)
{
int nid = page_to_nid(page);
nodemask_t nmask = node_states[N_MEMORY];
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 947e73feea41..e94bd70840de 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -943,7 +943,7 @@ static void migrate_page_add(struct page *page, struct list_head *pagelist,
}
/* page allocation callback for NUMA node migration */
-struct page *alloc_new_node_page(struct page *page, unsigned long node, int **x)
+struct page *alloc_new_node_page(struct page *page, unsigned long node)
{
if (PageHuge(page))
return alloc_huge_page_node(page_hstate(compound_head(page)),
@@ -1108,7 +1108,7 @@ int do_migrate_pages(struct mm_struct *mm, const nodemask_t *from,
* list of pages handed to migrate_pages()--which is how we get here--
* is in virtual address order.
*/
-static struct page *new_page(struct page *page, unsigned long start, int **x)
+static struct page *new_page(struct page *page, unsigned long start)
{
struct vm_area_struct *vma;
unsigned long uninitialized_var(address);
@@ -1153,7 +1153,7 @@ int do_migrate_pages(struct mm_struct *mm, const nodemask_t *from,
return -ENOSYS;
}
-static struct page *new_page(struct page *page, unsigned long start, int **x)
+static struct page *new_page(struct page *page, unsigned long start)
{
return NULL;
}
diff --git a/mm/migrate.c b/mm/migrate.c
index 6068d4049a31..c606752f6d2a 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1137,10 +1137,9 @@ static ICE_noinline int unmap_and_move(new_page_t get_new_page,
enum migrate_reason reason)
{
int rc = MIGRATEPAGE_SUCCESS;
- int *result = NULL;
struct page *newpage;
- newpage = get_new_page(page, private, &result);
+ newpage = get_new_page(page, private);
if (!newpage)
return -ENOMEM;
@@ -1231,12 +1230,6 @@ put_new:
put_page(newpage);
}
- if (result) {
- if (rc)
- *result = rc;
- else
- *result = page_to_nid(newpage);
- }
return rc;
}
@@ -1264,7 +1257,6 @@ static int unmap_and_move_huge_page(new_page_t get_new_page,
enum migrate_mode mode, int reason)
{
int rc = -EAGAIN;
- int *result = NULL;
int page_was_mapped = 0;
struct page *new_hpage;
struct anon_vma *anon_vma = NULL;
@@ -1281,7 +1273,7 @@ static int unmap_and_move_huge_page(new_page_t get_new_page,
return -ENOSYS;
}
- new_hpage = get_new_page(hpage, private, &result);
+ new_hpage = get_new_page(hpage, private);
if (!new_hpage)
return -ENOMEM;
@@ -1345,12 +1337,6 @@ out:
else
putback_active_hugepage(new_hpage);
- if (result) {
- if (rc)
- *result = rc;
- else
- *result = page_to_nid(new_hpage);
- }
return rc;
}
@@ -1828,8 +1814,7 @@ static bool migrate_balanced_pgdat(struct pglist_data *pgdat,
}
static struct page *alloc_misplaced_dst_page(struct page *page,
- unsigned long data,
- int **result)
+ unsigned long data)
{
int nid = (int) data;
struct page *newpage;
diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index 61dee77bb211..43e085608846 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -309,8 +309,7 @@ int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
return pfn < end_pfn ? -EBUSY : 0;
}
-struct page *alloc_migrate_target(struct page *page, unsigned long private,
- int **resultp)
+struct page *alloc_migrate_target(struct page *page, unsigned long private)
{
return new_page_nodemask(page, numa_node_id(), &node_states[N_MEMORY]);
}