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-rw-r--r--mm/percpu.c49
1 files changed, 25 insertions, 24 deletions
diff --git a/mm/percpu.c b/mm/percpu.c
index dc755721c333..84cc2559d4aa 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -253,35 +253,32 @@ static unsigned long pcpu_chunk_addr(struct pcpu_chunk *chunk,
pcpu_unit_page_offset(cpu, page_idx);
}
-static void __maybe_unused pcpu_next_unpop(struct pcpu_chunk *chunk,
- int *rs, int *re, int end)
+static void pcpu_next_unpop(unsigned long *bitmap, int *rs, int *re, int end)
{
- *rs = find_next_zero_bit(chunk->populated, end, *rs);
- *re = find_next_bit(chunk->populated, end, *rs + 1);
+ *rs = find_next_zero_bit(bitmap, end, *rs);
+ *re = find_next_bit(bitmap, end, *rs + 1);
}
-static void __maybe_unused pcpu_next_pop(struct pcpu_chunk *chunk,
- int *rs, int *re, int end)
+static void pcpu_next_pop(unsigned long *bitmap, int *rs, int *re, int end)
{
- *rs = find_next_bit(chunk->populated, end, *rs);
- *re = find_next_zero_bit(chunk->populated, end, *rs + 1);
+ *rs = find_next_bit(bitmap, end, *rs);
+ *re = find_next_zero_bit(bitmap, end, *rs + 1);
}
/*
- * (Un)populated page region iterators. Iterate over (un)populated
- * page regions between @start and @end in @chunk. @rs and @re should
- * be integer variables and will be set to start and end page index of
- * the current region.
+ * Bitmap region iterators. Iterates over the bitmap between
+ * [@start, @end) in @chunk. @rs and @re should be integer variables
+ * and will be set to start and end index of the current free region.
*/
-#define pcpu_for_each_unpop_region(chunk, rs, re, start, end) \
- for ((rs) = (start), pcpu_next_unpop((chunk), &(rs), &(re), (end)); \
- (rs) < (re); \
- (rs) = (re) + 1, pcpu_next_unpop((chunk), &(rs), &(re), (end)))
+#define pcpu_for_each_unpop_region(bitmap, rs, re, start, end) \
+ for ((rs) = (start), pcpu_next_unpop((bitmap), &(rs), &(re), (end)); \
+ (rs) < (re); \
+ (rs) = (re) + 1, pcpu_next_unpop((bitmap), &(rs), &(re), (end)))
-#define pcpu_for_each_pop_region(chunk, rs, re, start, end) \
- for ((rs) = (start), pcpu_next_pop((chunk), &(rs), &(re), (end)); \
- (rs) < (re); \
- (rs) = (re) + 1, pcpu_next_pop((chunk), &(rs), &(re), (end)))
+#define pcpu_for_each_pop_region(bitmap, rs, re, start, end) \
+ for ((rs) = (start), pcpu_next_pop((bitmap), &(rs), &(re), (end)); \
+ (rs) < (re); \
+ (rs) = (re) + 1, pcpu_next_pop((bitmap), &(rs), &(re), (end)))
/**
* pcpu_mem_zalloc - allocate memory
@@ -521,7 +518,8 @@ static int pcpu_fit_in_area(struct pcpu_chunk *chunk, int off, int this_size,
page_end = PFN_UP(head + off + size);
rs = page_start;
- pcpu_next_unpop(chunk, &rs, &re, PFN_UP(off + this_size));
+ pcpu_next_unpop(chunk->populated, &rs, &re,
+ PFN_UP(off + this_size));
if (rs >= page_end)
return head;
cand_off = re * PAGE_SIZE;
@@ -1071,7 +1069,8 @@ area_found:
page_start = PFN_DOWN(off);
page_end = PFN_UP(off + size);
- pcpu_for_each_unpop_region(chunk, rs, re, page_start, page_end) {
+ pcpu_for_each_unpop_region(chunk->populated, rs, re,
+ page_start, page_end) {
WARN_ON(chunk->immutable);
ret = pcpu_populate_chunk(chunk, rs, re);
@@ -1221,7 +1220,8 @@ static void pcpu_balance_workfn(struct work_struct *work)
list_for_each_entry_safe(chunk, next, &to_free, list) {
int rs, re;
- pcpu_for_each_pop_region(chunk, rs, re, 0, chunk->nr_pages) {
+ pcpu_for_each_pop_region(chunk->populated, rs, re, 0,
+ chunk->nr_pages) {
pcpu_depopulate_chunk(chunk, rs, re);
spin_lock_irq(&pcpu_lock);
pcpu_chunk_depopulated(chunk, rs, re);
@@ -1288,7 +1288,8 @@ retry_pop:
continue;
/* @chunk can't go away while pcpu_alloc_mutex is held */
- pcpu_for_each_unpop_region(chunk, rs, re, 0, chunk->nr_pages) {
+ pcpu_for_each_unpop_region(chunk->populated, rs, re, 0,
+ chunk->nr_pages) {
int nr = min(re - rs, nr_to_pop);
ret = pcpu_populate_chunk(chunk, rs, rs + nr);