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Re: [PATCH 12/19] migration: fix -Werror=maybe-uninitialized false-posit


From: Yong Huang
Subject: Re: [PATCH 12/19] migration: fix -Werror=maybe-uninitialized false-positives
Date: Fri, 29 Mar 2024 09:14:57 +0800



On Thu, Mar 28, 2024 at 6:23 PM <marcandre.lureau@redhat.com> wrote:
From: Marc-André Lureau <marcandre.lureau@redhat.com>

../migration/dirtyrate.c:186:5: error: ‘records’ may be used uninitialized [-Werror=maybe-uninitialized]
../migration/dirtyrate.c:168:12: error: ‘gen_id’ may be used uninitialized [-Werror=maybe-uninitialized]
../migration/migration.c:2273:5: error: ‘file’ may be used uninitialized [-Werror=maybe-uninitialized]

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 migration/dirtyrate.c | 4 ++--
 migration/migration.c | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c
index 1d2e85746f..22dd22922c 100644
--- a/migration/dirtyrate.c
+++ b/migration/dirtyrate.c
@@ -144,12 +144,12 @@ int64_t vcpu_calculate_dirtyrate(int64_t calc_time_ms,
                                  unsigned int flag,
                                  bool one_shot)
 {
-    DirtyPageRecord *records;
+    DirtyPageRecord *records = NULL;
     int64_t init_time_ms;
     int64_t duration;
     int64_t dirtyrate;
     int i = 0;
-    unsigned int gen_id;
+    unsigned int gen_id = 0;

 retry:
     init_time_ms = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
diff --git a/migration/migration.c b/migration/migration.c
index 9fe8fd2afd..412138ea94 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -2247,7 +2247,7 @@ static bool migrate_handle_rp_resume_ack(MigrationState *s,
  */
 static void migration_release_dst_files(MigrationState *ms)
 {
-    QEMUFile *file;
+    QEMUFile *file = NULL;

     WITH_QEMU_LOCK_GUARD(&ms->qemu_file_lock) {
         /*
--
2.44.0


Reviewed-by: Hyman Huang <yong.huang@smartx.com>

Yong

--
Best regards

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