xen-balloon: clean up unused functions
Remove some unused functions: balloon_update_driver_allowance balloon_release_driver_page only used on the (obsolete, removed) flip path in netfront alloc_empty_pages_and_pagevec free_empty_pages_and_pagevec only used in backend drivers; can be reintroduced when needed Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jeremy Fitzhardinge
Ingo Molnar
parent
167e6cf629
commit
fde28e8f49
|
|
@ -226,9 +226,8 @@ static int increase_reservation(unsigned long nr_pages)
|
|||
}
|
||||
|
||||
set_xen_guest_handle(reservation.extent_start, frame_list);
|
||||
reservation.nr_extents = nr_pages;
|
||||
rc = HYPERVISOR_memory_op(
|
||||
XENMEM_populate_physmap, &reservation);
|
||||
reservation.nr_extents = nr_pages;
|
||||
rc = HYPERVISOR_memory_op(XENMEM_populate_physmap, &reservation);
|
||||
if (rc < nr_pages) {
|
||||
if (rc > 0) {
|
||||
int ret;
|
||||
|
|
@ -236,7 +235,7 @@ static int increase_reservation(unsigned long nr_pages)
|
|||
/* We hit the Xen hard limit: reprobe. */
|
||||
reservation.nr_extents = rc;
|
||||
ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation,
|
||||
&reservation);
|
||||
&reservation);
|
||||
BUG_ON(ret != rc);
|
||||
}
|
||||
if (rc >= 0)
|
||||
|
|
@ -464,130 +463,6 @@ static void balloon_exit(void)
|
|||
|
||||
module_exit(balloon_exit);
|
||||
|
||||
static void balloon_update_driver_allowance(long delta)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&balloon_lock, flags);
|
||||
balloon_stats.driver_pages += delta;
|
||||
spin_unlock_irqrestore(&balloon_lock, flags);
|
||||
}
|
||||
|
||||
static int dealloc_pte_fn(
|
||||
pte_t *pte, struct page *pmd_page, unsigned long addr, void *data)
|
||||
{
|
||||
unsigned long mfn = pte_mfn(*pte);
|
||||
int ret;
|
||||
struct xen_memory_reservation reservation = {
|
||||
.nr_extents = 1,
|
||||
.extent_order = 0,
|
||||
.domid = DOMID_SELF
|
||||
};
|
||||
set_xen_guest_handle(reservation.extent_start, &mfn);
|
||||
set_pte_at(&init_mm, addr, pte, __pte_ma(0ull));
|
||||
set_phys_to_machine(__pa(addr) >> PAGE_SHIFT, INVALID_P2M_ENTRY);
|
||||
ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation, &reservation);
|
||||
BUG_ON(ret != 1);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct page **alloc_empty_pages_and_pagevec(int nr_pages)
|
||||
{
|
||||
unsigned long vaddr, flags;
|
||||
struct page *page, **pagevec;
|
||||
int i, ret;
|
||||
|
||||
pagevec = kmalloc(sizeof(page) * nr_pages, GFP_KERNEL);
|
||||
if (pagevec == NULL)
|
||||
return NULL;
|
||||
|
||||
for (i = 0; i < nr_pages; i++) {
|
||||
page = pagevec[i] = alloc_page(GFP_KERNEL);
|
||||
if (page == NULL)
|
||||
goto err;
|
||||
|
||||
vaddr = (unsigned long)page_address(page);
|
||||
|
||||
scrub_page(page);
|
||||
|
||||
spin_lock_irqsave(&balloon_lock, flags);
|
||||
|
||||
if (xen_feature(XENFEAT_auto_translated_physmap)) {
|
||||
unsigned long gmfn = page_to_pfn(page);
|
||||
struct xen_memory_reservation reservation = {
|
||||
.nr_extents = 1,
|
||||
.extent_order = 0,
|
||||
.domid = DOMID_SELF
|
||||
};
|
||||
set_xen_guest_handle(reservation.extent_start, &gmfn);
|
||||
ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation,
|
||||
&reservation);
|
||||
if (ret == 1)
|
||||
ret = 0; /* success */
|
||||
} else {
|
||||
ret = apply_to_page_range(&init_mm, vaddr, PAGE_SIZE,
|
||||
dealloc_pte_fn, NULL);
|
||||
}
|
||||
|
||||
if (ret != 0) {
|
||||
spin_unlock_irqrestore(&balloon_lock, flags);
|
||||
__free_page(page);
|
||||
goto err;
|
||||
}
|
||||
|
||||
totalram_pages = --balloon_stats.current_pages;
|
||||
|
||||
spin_unlock_irqrestore(&balloon_lock, flags);
|
||||
}
|
||||
|
||||
out:
|
||||
schedule_work(&balloon_worker);
|
||||
flush_tlb_all();
|
||||
return pagevec;
|
||||
|
||||
err:
|
||||
spin_lock_irqsave(&balloon_lock, flags);
|
||||
while (--i >= 0)
|
||||
balloon_append(pagevec[i]);
|
||||
spin_unlock_irqrestore(&balloon_lock, flags);
|
||||
kfree(pagevec);
|
||||
pagevec = NULL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
static void free_empty_pages_and_pagevec(struct page **pagevec, int nr_pages)
|
||||
{
|
||||
unsigned long flags;
|
||||
int i;
|
||||
|
||||
if (pagevec == NULL)
|
||||
return;
|
||||
|
||||
spin_lock_irqsave(&balloon_lock, flags);
|
||||
for (i = 0; i < nr_pages; i++) {
|
||||
BUG_ON(page_count(pagevec[i]) != 1);
|
||||
balloon_append(pagevec[i]);
|
||||
}
|
||||
spin_unlock_irqrestore(&balloon_lock, flags);
|
||||
|
||||
kfree(pagevec);
|
||||
|
||||
schedule_work(&balloon_worker);
|
||||
}
|
||||
|
||||
static void balloon_release_driver_page(struct page *page)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&balloon_lock, flags);
|
||||
balloon_append(page);
|
||||
balloon_stats.driver_pages--;
|
||||
spin_unlock_irqrestore(&balloon_lock, flags);
|
||||
|
||||
schedule_work(&balloon_worker);
|
||||
}
|
||||
|
||||
|
||||
#define BALLOON_SHOW(name, format, args...) \
|
||||
static ssize_t show_##name(struct sys_device *dev, \
|
||||
struct sysdev_attribute *attr, \
|
||||
|
|
@ -691,20 +566,4 @@ static int register_balloon(struct sys_device *sysdev)
|
|||
return error;
|
||||
}
|
||||
|
||||
static void unregister_balloon(struct sys_device *sysdev)
|
||||
{
|
||||
int i;
|
||||
|
||||
sysfs_remove_group(&sysdev->kobj, &balloon_info_group);
|
||||
for (i = 0; i < ARRAY_SIZE(balloon_attrs); i++)
|
||||
sysdev_remove_file(sysdev, balloon_attrs[i]);
|
||||
sysdev_unregister(sysdev);
|
||||
sysdev_class_unregister(&balloon_sysdev_class);
|
||||
}
|
||||
|
||||
static void balloon_sysfs_exit(void)
|
||||
{
|
||||
unregister_balloon(&balloon_sysdev);
|
||||
}
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
|
|||
Loading…
Reference in a new issue