From b404e1ea2e0315a8031fe67005e2921eab23e7a4 Mon Sep 17 00:00:00 2001
From: John Snow <jsnow@redhat.com>
Date: Wed, 20 Mar 2019 21:48:35 +0100
Subject: [PATCH 042/163] Revert "hbitmap: Add @advance param to
hbitmap_iter_next()"
RH-Author: John Snow <jsnow@redhat.com>
Message-id: <20190320214838.22027-8-jsnow@redhat.com>
Patchwork-id: 84995
O-Subject: [RHEL-7.7 qemu-kvm-rhev PATCH 07/10] Revert "hbitmap: Add @advance param to hbitmap_iter_next()"
Bugzilla: 1691048
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
This reverts commit a33fbb4f8b64226becf502a123733776ce319b24.
The functionality is unused.
Note: in addition to automatic revert, drop second parameter in
hbitmap_iter_next() call from hbitmap_next_dirty_area() too.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
(cherry picked from commit 19c021e1948a81c4ba19b3ff735432b45b6aebee)
Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
block/backup.c | 2 +-
block/dirty-bitmap.c | 2 +-
include/qemu/hbitmap.h | 5 +----
tests/test-hbitmap.c | 26 +++++++++++++-------------
util/hbitmap.c | 12 ++++--------
5 files changed, 20 insertions(+), 27 deletions(-)
diff --git a/block/backup.c b/block/backup.c
index 6a66b1c..90680c4 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -409,7 +409,7 @@ static int coroutine_fn backup_run_incremental(BackupBlockJob *job)
HBitmapIter hbi;
hbitmap_iter_init(&hbi, job->copy_bitmap, 0);
- while ((cluster = hbitmap_iter_next(&hbi, true)) != -1) {
+ while ((cluster = hbitmap_iter_next(&hbi)) != -1) {
do {
if (yield_and_check(job)) {
return 0;
diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
index 4d9a8af..00ea36f 100644
--- a/block/dirty-bitmap.c
+++ b/block/dirty-bitmap.c
@@ -515,7 +515,7 @@ void bdrv_dirty_iter_free(BdrvDirtyBitmapIter *iter)
int64_t bdrv_dirty_iter_next(BdrvDirtyBitmapIter *iter)
{
- return hbitmap_iter_next(&iter->hbi, true);
+ return hbitmap_iter_next(&iter->hbi);
}
/* Called within bdrv_dirty_bitmap_lock..unlock */
diff --git a/include/qemu/hbitmap.h b/include/qemu/hbitmap.h
index 097dce3..4afbe62 100644
--- a/include/qemu/hbitmap.h
+++ b/include/qemu/hbitmap.h
@@ -351,14 +351,11 @@ void hbitmap_free_meta(HBitmap *hb);
/**
* hbitmap_iter_next:
* @hbi: HBitmapIter to operate on.
- * @advance: If true, advance the iterator. Otherwise, the next call
- * of this function will return the same result (if that
- * position is still dirty).
*
* Return the next bit that is set in @hbi's associated HBitmap,
* or -1 if all remaining bits are zero.
*/
-int64_t hbitmap_iter_next(HBitmapIter *hbi, bool advance);
+int64_t hbitmap_iter_next(HBitmapIter *hbi);
/**
* hbitmap_iter_next_word:
diff --git a/tests/test-hbitmap.c b/tests/test-hbitmap.c
index 6358f35..592d821 100644
--- a/tests/test-hbitmap.c
+++ b/tests/test-hbitmap.c
@@ -46,7 +46,7 @@ static void hbitmap_test_check(TestHBitmapData *data,
i = first;
for (;;) {
- next = hbitmap_iter_next(&hbi, true);
+ next = hbitmap_iter_next(&hbi);
if (next < 0) {
next = data->size;
}
@@ -435,25 +435,25 @@ static void test_hbitmap_iter_granularity(TestHBitmapData *data,
/* Note that hbitmap_test_check has to be invoked manually in this test. */
hbitmap_test_init(data, 131072 << 7, 7);
hbitmap_iter_init(&hbi, data->hb, 0);
- g_assert_cmpint(hbitmap_iter_next(&hbi, true), <, 0);
+ g_assert_cmpint(hbitmap_iter_next(&hbi), <, 0);
hbitmap_test_set(data, ((L2 + L1 + 1) << 7) + 8, 8);
hbitmap_iter_init(&hbi, data->hb, 0);
- g_assert_cmpint(hbitmap_iter_next(&hbi, true), ==, (L2 + L1 + 1) << 7);
- g_assert_cmpint(hbitmap_iter_next(&hbi, true), <, 0);
+ g_assert_cmpint(hbitmap_iter_next(&hbi), ==, (L2 + L1 + 1) << 7);
+ g_assert_cmpint(hbitmap_iter_next(&hbi), <, 0);
hbitmap_iter_init(&hbi, data->hb, (L2 + L1 + 2) << 7);
- g_assert_cmpint(hbitmap_iter_next(&hbi, true), <, 0);
+ g_assert_cmpint(hbitmap_iter_next(&hbi), <, 0);
hbitmap_test_set(data, (131072 << 7) - 8, 8);
hbitmap_iter_init(&hbi, data->hb, 0);
- g_assert_cmpint(hbitmap_iter_next(&hbi, true), ==, (L2 + L1 + 1) << 7);
- g_assert_cmpint(hbitmap_iter_next(&hbi, true), ==, 131071 << 7);
- g_assert_cmpint(hbitmap_iter_next(&hbi, true), <, 0);
+ g_assert_cmpint(hbitmap_iter_next(&hbi), ==, (L2 + L1 + 1) << 7);
+ g_assert_cmpint(hbitmap_iter_next(&hbi), ==, 131071 << 7);
+ g_assert_cmpint(hbitmap_iter_next(&hbi), <, 0);
hbitmap_iter_init(&hbi, data->hb, (L2 + L1 + 2) << 7);
- g_assert_cmpint(hbitmap_iter_next(&hbi, true), ==, 131071 << 7);
- g_assert_cmpint(hbitmap_iter_next(&hbi, true), <, 0);
+ g_assert_cmpint(hbitmap_iter_next(&hbi), ==, 131071 << 7);
+ g_assert_cmpint(hbitmap_iter_next(&hbi), <, 0);
}
static void hbitmap_test_set_boundary_bits(TestHBitmapData *data, ssize_t diff)
@@ -893,7 +893,7 @@ static void test_hbitmap_serialize_zeroes(TestHBitmapData *data,
for (i = 0; i < num_positions; i++) {
hbitmap_deserialize_zeroes(data->hb, positions[i], min_l1, true);
hbitmap_iter_init(&iter, data->hb, 0);
- next = hbitmap_iter_next(&iter, true);
+ next = hbitmap_iter_next(&iter);
if (i == num_positions - 1) {
g_assert_cmpint(next, ==, -1);
} else {
@@ -919,10 +919,10 @@ static void test_hbitmap_iter_and_reset(TestHBitmapData *data,
hbitmap_iter_init(&hbi, data->hb, BITS_PER_LONG - 1);
- hbitmap_iter_next(&hbi, true);
+ hbitmap_iter_next(&hbi);
hbitmap_reset_all(data->hb);
- hbitmap_iter_next(&hbi, true);
+ hbitmap_iter_next(&hbi);
}
static void test_hbitmap_next_zero_check_range(TestHBitmapData *data,
diff --git a/util/hbitmap.c b/util/hbitmap.c
index fa35652..7905212 100644
--- a/util/hbitmap.c
+++ b/util/hbitmap.c
@@ -144,7 +144,7 @@ unsigned long hbitmap_iter_skip_words(HBitmapIter *hbi)
return cur;
}
-int64_t hbitmap_iter_next(HBitmapIter *hbi, bool advance)
+int64_t hbitmap_iter_next(HBitmapIter *hbi)
{
unsigned long cur = hbi->cur[HBITMAP_LEVELS - 1] &
hbi->hb->levels[HBITMAP_LEVELS - 1][hbi->pos];
@@ -157,12 +157,8 @@ int64_t hbitmap_iter_next(HBitmapIter *hbi, bool advance)
}
}
- if (advance) {
- /* The next call will resume work from the next bit. */
- hbi->cur[HBITMAP_LEVELS - 1] = cur & (cur - 1);
- } else {
- hbi->cur[HBITMAP_LEVELS - 1] = cur;
- }
+ /* The next call will resume work from the next bit. */
+ hbi->cur[HBITMAP_LEVELS - 1] = cur & (cur - 1);
item = ((uint64_t)hbi->pos << BITS_PER_LEVEL) + ctzl(cur);
return item << hbi->granularity;
@@ -261,7 +257,7 @@ bool hbitmap_next_dirty_area(const HBitmap *hb, uint64_t *start,
end = *count > hb->orig_size - *start ? hb->orig_size : *start + *count;
hbitmap_iter_init(&hbi, hb, *start);
- firt_dirty_off = hbitmap_iter_next(&hbi, false);
+ firt_dirty_off = hbitmap_iter_next(&hbi);
if (firt_dirty_off < 0 || firt_dirty_off >= end) {
return false;
--
1.8.3.1