[PATCH 2/2] mm: add pageblock_aligned() macro
From: Kefeng Wang
Date: Fri Sep 02 2022 - 02:43:55 EST
Add pageblock_aligned() and use it to simplify code.
Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
---
include/linux/pageblock-flags.h | 1 +
mm/compaction.c | 8 ++++----
mm/memory_hotplug.c | 6 ++----
mm/page_alloc.c | 17 +++++++----------
mm/page_isolation.c | 2 +-
5 files changed, 15 insertions(+), 19 deletions(-)
diff --git a/include/linux/pageblock-flags.h b/include/linux/pageblock-flags.h
index ef2e17e312ae..e0b980268442 100644
--- a/include/linux/pageblock-flags.h
+++ b/include/linux/pageblock-flags.h
@@ -53,6 +53,7 @@ extern unsigned int pageblock_order;
#endif /* CONFIG_HUGETLB_PAGE */
#define pageblock_nr_pages (1UL << pageblock_order)
+#define pageblock_aligned(pfn) IS_ALIGNED((unsigned long)(pfn), pageblock_nr_pages)
#define pageblock_start_pfn(pfn) round_down(pfn, pageblock_nr_pages)
#define pageblock_end_pfn(pfn) ALIGN((pfn + 1), pageblock_nr_pages)
diff --git a/mm/compaction.c b/mm/compaction.c
index 65bef5f78897..c4e4453187a2 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -402,7 +402,7 @@ static bool test_and_set_skip(struct compact_control *cc, struct page *page,
if (cc->ignore_skip_hint)
return false;
- if (!IS_ALIGNED(pfn, pageblock_nr_pages))
+ if (!pageblock_aligned(pfn))
return false;
skip = get_pageblock_skip(page);
@@ -884,7 +884,7 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
* COMPACT_CLUSTER_MAX at a time so the second call must
* not falsely conclude that the block should be skipped.
*/
- if (!valid_page && IS_ALIGNED(low_pfn, pageblock_nr_pages)) {
+ if (!valid_page && pageblock_aligned(low_pfn)) {
if (!isolation_suitable(cc, page)) {
low_pfn = end_pfn;
page = NULL;
@@ -1936,7 +1936,7 @@ static isolate_migrate_t isolate_migratepages(struct compact_control *cc)
* before making it "skip" so other compaction instances do
* not scan the same block.
*/
- if (IS_ALIGNED(low_pfn, pageblock_nr_pages) &&
+ if (pageblock_aligned(low_pfn) &&
!fast_find_block && !isolation_suitable(cc, page))
continue;
@@ -2122,7 +2122,7 @@ static enum compact_result __compact_finished(struct compact_control *cc)
* migration source is unmovable/reclaimable but it's not worth
* special casing.
*/
- if (!IS_ALIGNED(cc->migrate_pfn, pageblock_nr_pages))
+ if (!pageblock_aligned(cc->migrate_pfn))
return COMPACT_CONTINUE;
/* Direct compactor: Is a suitable page free? */
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 9ae1f98548b1..fd40f7e9f176 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1085,8 +1085,7 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages,
* of the physical memory space for vmemmaps. That space is pageblock
* aligned.
*/
- if (WARN_ON_ONCE(!nr_pages ||
- !IS_ALIGNED(pfn, pageblock_nr_pages) ||
+ if (WARN_ON_ONCE(!nr_pages || !pageblock_aligned(pfn) ||
!IS_ALIGNED(pfn + nr_pages, PAGES_PER_SECTION)))
return -EINVAL;
@@ -1806,8 +1805,7 @@ int __ref offline_pages(unsigned long start_pfn, unsigned long nr_pages,
* of the physical memory space for vmemmaps. That space is pageblock
* aligned.
*/
- if (WARN_ON_ONCE(!nr_pages ||
- !IS_ALIGNED(start_pfn, pageblock_nr_pages) ||
+ if (WARN_ON_ONCE(!nr_pages || !pageblock_aligned(start_pfn) ||
!IS_ALIGNED(start_pfn + nr_pages, PAGES_PER_SECTION)))
return -EINVAL;
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 93339cc61f92..d030c20a6081 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1892,15 +1892,14 @@ static void __init deferred_free_range(unsigned long pfn,
page = pfn_to_page(pfn);
/* Free a large naturally-aligned chunk if possible */
- if (nr_pages == pageblock_nr_pages &&
- (pfn & (pageblock_nr_pages - 1)) == 0) {
+ if (nr_pages == pageblock_nr_pages && pageblock_aligned(pfn)) {
set_pageblock_migratetype(page, MIGRATE_MOVABLE);
__free_pages_core(page, pageblock_order);
return;
}
for (i = 0; i < nr_pages; i++, page++, pfn++) {
- if ((pfn & (pageblock_nr_pages - 1)) == 0)
+ if (pageblock_aligned(pfn))
set_pageblock_migratetype(page, MIGRATE_MOVABLE);
__free_pages_core(page, 0);
}
@@ -1928,7 +1927,7 @@ static inline void __init pgdat_init_report_one_done(void)
*/
static inline bool __init deferred_pfn_valid(unsigned long pfn)
{
- if (!(pfn & (pageblock_nr_pages - 1)) && !pfn_valid(pfn))
+ if (!pageblock_aligned(pfn) && !pfn_valid(pfn))
return false;
return true;
}
@@ -1940,14 +1939,13 @@ static inline bool __init deferred_pfn_valid(unsigned long pfn)
static void __init deferred_free_pages(unsigned long pfn,
unsigned long end_pfn)
{
- unsigned long nr_pgmask = pageblock_nr_pages - 1;
unsigned long nr_free = 0;
for (; pfn < end_pfn; pfn++) {
if (!deferred_pfn_valid(pfn)) {
deferred_free_range(pfn - nr_free, nr_free);
nr_free = 0;
- } else if (!(pfn & nr_pgmask)) {
+ } else if (!pageblock_aligned(pfn)) {
deferred_free_range(pfn - nr_free, nr_free);
nr_free = 1;
} else {
@@ -1967,7 +1965,6 @@ static unsigned long __init deferred_init_pages(struct zone *zone,
unsigned long pfn,
unsigned long end_pfn)
{
- unsigned long nr_pgmask = pageblock_nr_pages - 1;
int nid = zone_to_nid(zone);
unsigned long nr_pages = 0;
int zid = zone_idx(zone);
@@ -1977,7 +1974,7 @@ static unsigned long __init deferred_init_pages(struct zone *zone,
if (!deferred_pfn_valid(pfn)) {
page = NULL;
continue;
- } else if (!page || !(pfn & nr_pgmask)) {
+ } else if (!page || !pageblock_aligned(pfn)) {
page = pfn_to_page(pfn);
} else {
page++;
@@ -6759,7 +6756,7 @@ void __meminit memmap_init_range(unsigned long size, int nid, unsigned long zone
* such that unmovable allocations won't be scattered all
* over the place during system boot.
*/
- if (IS_ALIGNED(pfn, pageblock_nr_pages)) {
+ if (pageblock_aligned(pfn)) {
set_pageblock_migratetype(page, migratetype);
cond_resched();
}
@@ -6802,7 +6799,7 @@ static void __ref __init_zone_device_page(struct page *page, unsigned long pfn,
* Please note that MEMINIT_HOTPLUG path doesn't clear memmap
* because this is done early in section_activate()
*/
- if (IS_ALIGNED(pfn, pageblock_nr_pages)) {
+ if (pageblock_aligned(pfn)) {
set_pageblock_migratetype(page, MIGRATE_MOVABLE);
cond_resched();
}
diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index f2df4ad53cd6..13cc00598677 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -311,7 +311,7 @@ static int isolate_single_pageblock(unsigned long boundary_pfn, int flags,
struct zone *zone;
int ret;
- VM_BUG_ON(!IS_ALIGNED(boundary_pfn, pageblock_nr_pages));
+ VM_BUG_ON(!pageblock_aligned(boundary_pfn));
if (isolate_before)
isolate_pageblock = boundary_pfn - pageblock_nr_pages;
--
2.35.3