AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

xen-balloon: clean up unused functions

Browse Source 
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 2008-07-24 16:28:00 -07:00 committed by Ingo Molnar
parent 167e6cf629
commit fde28e8f49
1 changed files with 3 additions and 144 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

147
drivers/xen/balloon.c
View File

@ -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");