On 4/22/24 15:47, David Hildenbrand wrote:
On 22.04.24 09:42, zhenwei pi wrote:
All the VM events related statistics have dependence on
'CONFIG_VM_EVENT_COUNTERS', once any stack variable is required by any
VM events in future, we would have codes like:
#ifdef CONFIG_VM_EVENT_COUNTERS
unsigned long foo;
#endif
...
#ifdef CONFIG_VM_EVENT_COUNTERS
foo = events[XXX] + events[YYY];
update_stat(vb, idx++, VIRTIO_BALLOON_S_XXX, foo);
#endif
Separate vm events into a single function, also remove
Why not simply use __maybe_unused for that variable?
1>
static unsigned int update_balloon_stats()
{
unsigned __maybe_unused long foo;
...
#ifdef CONFIG_VM_EVENT_COUNTERS
foo = events[XXX] + events[YYY];
update_stat(vb, idx++, VIRTIO_BALLOON_S_XXX, foo);
#endif
}
2>
static inline unsigned int update_balloon_vm_stats()
{
#ifdef CONFIG_VM_EVENT_COUNTERS
unsigned long foo;
foo = events[XXX] + events[YYY];
update_stat(vb, idx++, VIRTIO_BALLOON_S_XXX, foo);
#endif
}
From the point of my view, I don't need to compile code in my brain
when reading codes for case 2. :)
--
zhenwei pi
