aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/hv/hv_balloon.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/hv/hv_balloon.c')
-rw-r--r--drivers/hv/hv_balloon.c82
1 files changed, 38 insertions, 44 deletions
diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
index 0d7a3ba6639649..e000fa3b9f978c 100644
--- a/drivers/hv/hv_balloon.c
+++ b/drivers/hv/hv_balloon.c
@@ -8,6 +8,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <linux/cleanup.h>
#include <linux/kernel.h>
#include <linux/jiffies.h>
#include <linux/mman.h>
@@ -646,7 +647,7 @@ static int hv_memory_notifier(struct notifier_block *nb, unsigned long val,
void *v)
{
struct memory_notify *mem = (struct memory_notify *)v;
- unsigned long flags, pfn_count;
+ unsigned long pfn_count;
switch (val) {
case MEM_ONLINE:
@@ -655,21 +656,22 @@ static int hv_memory_notifier(struct notifier_block *nb, unsigned long val,
break;
case MEM_OFFLINE:
- spin_lock_irqsave(&dm_device.ha_lock, flags);
- pfn_count = hv_page_offline_check(mem->start_pfn,
- mem->nr_pages);
- if (pfn_count <= dm_device.num_pages_onlined) {
- dm_device.num_pages_onlined -= pfn_count;
- } else {
- /*
- * We're offlining more pages than we managed to online.
- * This is unexpected. In any case don't let
- * num_pages_onlined wrap around zero.
- */
- WARN_ON_ONCE(1);
- dm_device.num_pages_onlined = 0;
+ scoped_guard(spinlock_irqsave, &dm_device.ha_lock) {
+ pfn_count = hv_page_offline_check(mem->start_pfn,
+ mem->nr_pages);
+ if (pfn_count <= dm_device.num_pages_onlined) {
+ dm_device.num_pages_onlined -= pfn_count;
+ } else {
+ /*
+ * We're offlining more pages than we
+ * managed to online. This is
+ * unexpected. In any case don't let
+ * num_pages_onlined wrap around zero.
+ */
+ WARN_ON_ONCE(1);
+ dm_device.num_pages_onlined = 0;
+ }
}
- spin_unlock_irqrestore(&dm_device.ha_lock, flags);
break;
case MEM_GOING_ONLINE:
case MEM_GOING_OFFLINE:
@@ -721,24 +723,23 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size,
unsigned long start_pfn;
unsigned long processed_pfn;
unsigned long total_pfn = pfn_count;
- unsigned long flags;
for (i = 0; i < (size/HA_CHUNK); i++) {
start_pfn = start + (i * HA_CHUNK);
- spin_lock_irqsave(&dm_device.ha_lock, flags);
- has->ha_end_pfn += HA_CHUNK;
+ scoped_guard(spinlock_irqsave, &dm_device.ha_lock) {
+ has->ha_end_pfn += HA_CHUNK;
- if (total_pfn > HA_CHUNK) {
- processed_pfn = HA_CHUNK;
- total_pfn -= HA_CHUNK;
- } else {
- processed_pfn = total_pfn;
- total_pfn = 0;
- }
+ if (total_pfn > HA_CHUNK) {
+ processed_pfn = HA_CHUNK;
+ total_pfn -= HA_CHUNK;
+ } else {
+ processed_pfn = total_pfn;
+ total_pfn = 0;
+ }
- has->covered_end_pfn += processed_pfn;
- spin_unlock_irqrestore(&dm_device.ha_lock, flags);
+ has->covered_end_pfn += processed_pfn;
+ }
reinit_completion(&dm_device.ol_waitevent);
@@ -758,10 +759,10 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size,
*/
do_hot_add = false;
}
- spin_lock_irqsave(&dm_device.ha_lock, flags);
- has->ha_end_pfn -= HA_CHUNK;
- has->covered_end_pfn -= processed_pfn;
- spin_unlock_irqrestore(&dm_device.ha_lock, flags);
+ scoped_guard(spinlock_irqsave, &dm_device.ha_lock) {
+ has->ha_end_pfn -= HA_CHUNK;
+ has->covered_end_pfn -= processed_pfn;
+ }
break;
}
@@ -781,10 +782,9 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size,
static void hv_online_page(struct page *pg, unsigned int order)
{
struct hv_hotadd_state *has;
- unsigned long flags;
unsigned long pfn = page_to_pfn(pg);
- spin_lock_irqsave(&dm_device.ha_lock, flags);
+ guard(spinlock_irqsave)(&dm_device.ha_lock);
list_for_each_entry(has, &dm_device.ha_region_list, list) {
/* The page belongs to a different HAS. */
if ((pfn < has->start_pfn) ||
@@ -794,7 +794,6 @@ static void hv_online_page(struct page *pg, unsigned int order)
hv_bring_pgs_online(has, pfn, 1UL << order);
break;
}
- spin_unlock_irqrestore(&dm_device.ha_lock, flags);
}
static int pfn_covered(unsigned long start_pfn, unsigned long pfn_cnt)
@@ -803,9 +802,8 @@ static int pfn_covered(unsigned long start_pfn, unsigned long pfn_cnt)
struct hv_hotadd_gap *gap;
unsigned long residual, new_inc;
int ret = 0;
- unsigned long flags;
- spin_lock_irqsave(&dm_device.ha_lock, flags);
+ guard(spinlock_irqsave)(&dm_device.ha_lock);
list_for_each_entry(has, &dm_device.ha_region_list, list) {
/*
* If the pfn range we are dealing with is not in the current
@@ -852,7 +850,6 @@ static int pfn_covered(unsigned long start_pfn, unsigned long pfn_cnt)
ret = 1;
break;
}
- spin_unlock_irqrestore(&dm_device.ha_lock, flags);
return ret;
}
@@ -947,7 +944,6 @@ static unsigned long process_hot_add(unsigned long pg_start,
{
struct hv_hotadd_state *ha_region = NULL;
int covered;
- unsigned long flags;
if (pfn_cnt == 0)
return 0;
@@ -979,9 +975,9 @@ static unsigned long process_hot_add(unsigned long pg_start,
ha_region->covered_end_pfn = pg_start;
ha_region->end_pfn = rg_start + rg_size;
- spin_lock_irqsave(&dm_device.ha_lock, flags);
- list_add_tail(&ha_region->list, &dm_device.ha_region_list);
- spin_unlock_irqrestore(&dm_device.ha_lock, flags);
+ scoped_guard(spinlock_irqsave, &dm_device.ha_lock) {
+ list_add_tail(&ha_region->list, &dm_device.ha_region_list);
+ }
}
do_pg_range:
@@ -2047,7 +2043,6 @@ static void balloon_remove(struct hv_device *dev)
struct hv_dynmem_device *dm = hv_get_drvdata(dev);
struct hv_hotadd_state *has, *tmp;
struct hv_hotadd_gap *gap, *tmp_gap;
- unsigned long flags;
if (dm->num_pages_ballooned != 0)
pr_warn("Ballooned pages: %d\n", dm->num_pages_ballooned);
@@ -2073,7 +2068,7 @@ static void balloon_remove(struct hv_device *dev)
#endif
}
- spin_lock_irqsave(&dm_device.ha_lock, flags);
+ guard(spinlock_irqsave)(&dm_device.ha_lock);
list_for_each_entry_safe(has, tmp, &dm->ha_region_list, list) {
list_for_each_entry_safe(gap, tmp_gap, &has->gap_list, list) {
list_del(&gap->list);
@@ -2082,7 +2077,6 @@ static void balloon_remove(struct hv_device *dev)
list_del(&has->list);
kfree(has);
}
- spin_unlock_irqrestore(&dm_device.ha_lock, flags);
}
static int balloon_suspend(struct hv_device *hv_dev)
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-31 08:26:33 +0000