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hv:refine alloc_vm_id api 

Fix violation "procedure has more than one exit point"
for this api.

Tracked-On: #861
Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Mingqiang Chi 2018-12-18 13:56:51 +08:00 committed by wenlingz
parent 235ad0ff5d
commit 65a7be8f52
1 changed files with 4 additions and 4 deletions
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8
hypervisor/arch/x86/guest/vm.c
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@ -16,19 +16,19 @@ static struct acrn_vm vm_array[CONFIG_MAX_VM_NUM] __aligned(PAGE_SIZE);
static uint64_t vmid_bitmap;
/* used for vmid allocation. And this means the max vm number is 64 */
static inline uint16_t alloc_vm_id(void)
{
uint16_t id = ffz64(vmid_bitmap);
while (id < (size_t)(sizeof(vmid_bitmap) * 8U)) {
while (id < CONFIG_MAX_VM_NUM) {
if (!bitmap_test_and_set_lock(id, &vmid_bitmap)) {
return id;
break;
}
id = ffz64(vmid_bitmap);
}
return INVALID_VM_ID;
id = (id >= CONFIG_MAX_VM_NUM) ? INVALID_VM_ID : id;
return id;
}
static inline void free_vm_id(const struct acrn_vm *vm)