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tests/unit/test-block-iothread: fix maybe-uninitialized error on GCC 11 

When building qemu with GCC 11, test-block-iothread produces the following
warning:

../tests/unit/test-block-iothread.c:148:11: error: ‘buf’ may be used
uninitialized [-Werror=maybe-uninitialized]

This is caused by buf[512] left uninitialized and passed to
bdrv_save_vmstate() that expects a const uint8_t *, so the compiler
assumes it will be read and expects the parameter to be initialized.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210319112218.49609-1-eesposit@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Emanuele Giuseppe Esposito 2021-03-19 12:22:18 +01:00 committed by Thomas Huth
parent 8db5c3e216
commit d8b2e5639a
1 changed files with 3 additions and 3 deletions
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6
tests/unit/test-block-iothread.c
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@ -89,7 +89,7 @@ static void test_sync_op_pread(BdrvChild *c)
static void test_sync_op_pwrite(BdrvChild *c)
{
uint8_t buf[512];
uint8_t buf[512] = { 0 };
int ret;
/* Success */
@ -117,7 +117,7 @@ static void test_sync_op_blk_pread(BlockBackend *blk)
static void test_sync_op_blk_pwrite(BlockBackend *blk)
{
uint8_t buf[512];
uint8_t buf[512] = { 0 };
int ret;
/* Success */
@ -141,7 +141,7 @@ static void test_sync_op_load_vmstate(BdrvChild *c)
static void test_sync_op_save_vmstate(BdrvChild *c)
{
uint8_t buf[512];
uint8_t buf[512] = { 0 };
int ret;
/* Error: Driver does not support snapshots */