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g_malloc(0) and g_malloc0(0) return NULL; simplify

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Once upon a time, it was decided that qemu_malloc(0) should abort.
Switching to glib retired that bright idea.  Some code that was added
to cope with it (e.g. in commits 702ef63, b76b6e9) is still around.
Bury it.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Markus Armbruster 2013-01-22 11:07:56 +01:00 committed by Stefan Hajnoczi
parent 74cef80c47
commit 6528499fa4
4 changed files with 5 additions and 18 deletions
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6
block/qcow2-refcount.c
View File

@ -737,11 +737,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
* l1_table_offset when it is the current s->l1_table_offset! Be careful
* when changing this! */
if (l1_table_offset != s->l1_table_offset) {
if (l1_size2 != 0) {
l1_table = g_malloc0(align_offset(l1_size2, 512));
} else {
l1_table = NULL;
}
l1_table = g_malloc0(align_offset(l1_size2, 512));
l1_allocated = 1;
if (bdrv_pread(bs->file, l1_table_offset,
l1_table, l1_size2) != l1_size2)

4
block/vdi.c
View File

@ -443,9 +443,7 @@ static int vdi_open(BlockDriverState *bs, int flags)
bmap_size = header.blocks_in_image * sizeof(uint32_t);
bmap_size = (bmap_size + SECTOR_SIZE - 1) / SECTOR_SIZE;
if (bmap_size > 0) {
s->bmap = g_malloc(bmap_size * SECTOR_SIZE);
}
s->bmap = g_malloc(bmap_size * SECTOR_SIZE);
ret = bdrv_read(bs->file, s->bmap_sector, (uint8_t *)s->bmap, bmap_size);
if (ret < 0) {
goto fail_free_bmap;

6
hw/9pfs/virtio-9p.c
View File

@ -3101,11 +3101,7 @@ static void v9fs_xattrcreate(void *opaque)
xattr_fidp->fs.xattr.flags = flags;
v9fs_string_init(&xattr_fidp->fs.xattr.name);
v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name);
if (size) {
xattr_fidp->fs.xattr.value = g_malloc(size);
} else {
xattr_fidp->fs.xattr.value = NULL;
}
xattr_fidp->fs.xattr.value = g_malloc(size);
err = offset;
put_fid(pdu, file_fidp);
out_nofid:

7
hw/vhost.c
View File

@ -269,11 +269,8 @@ static inline void vhost_dev_log_resize(struct vhost_dev* dev, uint64_t size)
vhost_log_chunk_t *log;
uint64_t log_base;
int r, i;
if (size) {
log = g_malloc0(size * sizeof *log);
} else {
log = NULL;
}
log = g_malloc0(size * sizeof *log);
log_base = (uint64_t)(unsigned long)log;
r = ioctl(dev->control, VHOST_SET_LOG_BASE, &log_base);
assert(r >= 0);