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-rw-r--r--kernel/power/hibernate.c2
-rw-r--r--kernel/power/snapshot.c20
-rw-r--r--kernel/power/suspend.c1
-rw-r--r--kernel/power/swap.c38
-rw-r--r--kernel/power/user.c13
5 files changed, 42 insertions, 32 deletions
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 406b4cbbec5e..f8934f9746e6 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -625,7 +625,7 @@ static void power_down(void)
int error;
if (hibernation_mode == HIBERNATION_SUSPEND) {
- error = suspend_devices_and_enter(PM_SUSPEND_MEM);
+ error = suspend_devices_and_enter(mem_sleep_current);
if (error) {
hibernation_mode = hibernation_ops ?
HIBERNATION_PLATFORM :
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index 46455aa7951e..336e56e97b8d 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -1680,8 +1680,8 @@ static unsigned long minimum_image_size(unsigned long saveable)
* /sys/power/reserved_size, respectively). To make this happen, we compute the
* total number of available page frames and allocate at least
*
- * ([page frames total] + PAGES_FOR_IO + [metadata pages]) / 2
- * + 2 * DIV_ROUND_UP(reserved_size, PAGE_SIZE)
+ * ([page frames total] - PAGES_FOR_IO - [metadata pages]) / 2
+ * - 2 * DIV_ROUND_UP(reserved_size, PAGE_SIZE)
*
* of them, which corresponds to the maximum size of a hibernation image.
*
@@ -2377,8 +2377,9 @@ static void *get_highmem_page_buffer(struct page *page,
pbe->copy_page = tmp;
} else {
/* Copy of the page will be stored in normal memory */
- kaddr = safe_pages_list;
- safe_pages_list = safe_pages_list->next;
+ kaddr = __get_safe_page(ca->gfp_mask);
+ if (!kaddr)
+ return ERR_PTR(-ENOMEM);
pbe->copy_page = virt_to_page(kaddr);
}
pbe->next = highmem_pblist;
@@ -2558,8 +2559,9 @@ static void *get_buffer(struct memory_bitmap *bm, struct chain_allocator *ca)
return ERR_PTR(-ENOMEM);
}
pbe->orig_address = page_address(page);
- pbe->address = safe_pages_list;
- safe_pages_list = safe_pages_list->next;
+ pbe->address = __get_safe_page(ca->gfp_mask);
+ if (!pbe->address)
+ return ERR_PTR(-ENOMEM);
pbe->next = restore_pblist;
restore_pblist = pbe;
return pbe->address;
@@ -2590,8 +2592,6 @@ int snapshot_write_next(struct snapshot_handle *handle)
if (handle->cur > 1 && handle->cur > nr_meta_pages + nr_copy_pages)
return 0;
- handle->sync_read = 1;
-
if (!handle->cur) {
if (!buffer)
/* This makes the buffer be freed by swsusp_free() */
@@ -2632,7 +2632,6 @@ int snapshot_write_next(struct snapshot_handle *handle)
memory_bm_position_reset(&orig_bm);
restore_pblist = NULL;
handle->buffer = get_buffer(&orig_bm, &ca);
- handle->sync_read = 0;
if (IS_ERR(handle->buffer))
return PTR_ERR(handle->buffer);
}
@@ -2644,9 +2643,8 @@ int snapshot_write_next(struct snapshot_handle *handle)
handle->buffer = get_buffer(&orig_bm, &ca);
if (IS_ERR(handle->buffer))
return PTR_ERR(handle->buffer);
- if (handle->buffer != buffer)
- handle->sync_read = 0;
}
+ handle->sync_read = (handle->buffer == buffer);
handle->cur++;
return PAGE_SIZE;
}
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 5dea2778a3db..c6433d3c04a0 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -187,6 +187,7 @@ static int __init mem_sleep_default_setup(char *str)
if (mem_sleep_labels[state] &&
!strcmp(str, mem_sleep_labels[state])) {
mem_sleep_default = state;
+ mem_sleep_current = state;
break;
}
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index bcc9769e8a3b..85949b86f097 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -594,11 +594,11 @@ static int crc32_threadfn(void *data)
unsigned i;
while (1) {
- wait_event(d->go, atomic_read(&d->ready) ||
+ wait_event(d->go, atomic_read_acquire(&d->ready) ||
kthread_should_stop());
if (kthread_should_stop()) {
d->thr = NULL;
- atomic_set(&d->stop, 1);
+ atomic_set_release(&d->stop, 1);
wake_up(&d->done);
break;
}
@@ -607,7 +607,7 @@ static int crc32_threadfn(void *data)
for (i = 0; i < d->run_threads; i++)
*d->crc32 = crc32_le(*d->crc32,
d->unc[i], *d->unc_len[i]);
- atomic_set(&d->stop, 1);
+ atomic_set_release(&d->stop, 1);
wake_up(&d->done);
}
return 0;
@@ -637,12 +637,12 @@ static int lzo_compress_threadfn(void *data)
struct cmp_data *d = data;
while (1) {
- wait_event(d->go, atomic_read(&d->ready) ||
+ wait_event(d->go, atomic_read_acquire(&d->ready) ||
kthread_should_stop());
if (kthread_should_stop()) {
d->thr = NULL;
d->ret = -1;
- atomic_set(&d->stop, 1);
+ atomic_set_release(&d->stop, 1);
wake_up(&d->done);
break;
}
@@ -651,7 +651,7 @@ static int lzo_compress_threadfn(void *data)
d->ret = lzo1x_1_compress(d->unc, d->unc_len,
d->cmp + LZO_HEADER, &d->cmp_len,
d->wrk);
- atomic_set(&d->stop, 1);
+ atomic_set_release(&d->stop, 1);
wake_up(&d->done);
}
return 0;
@@ -789,7 +789,7 @@ static int save_image_lzo(struct swap_map_handle *handle,
data[thr].unc_len = off;
- atomic_set(&data[thr].ready, 1);
+ atomic_set_release(&data[thr].ready, 1);
wake_up(&data[thr].go);
}
@@ -797,12 +797,12 @@ static int save_image_lzo(struct swap_map_handle *handle,
break;
crc->run_threads = thr;
- atomic_set(&crc->ready, 1);
+ atomic_set_release(&crc->ready, 1);
wake_up(&crc->go);
for (run_threads = thr, thr = 0; thr < run_threads; thr++) {
wait_event(data[thr].done,
- atomic_read(&data[thr].stop));
+ atomic_read_acquire(&data[thr].stop));
atomic_set(&data[thr].stop, 0);
ret = data[thr].ret;
@@ -841,7 +841,7 @@ static int save_image_lzo(struct swap_map_handle *handle,
}
}
- wait_event(crc->done, atomic_read(&crc->stop));
+ wait_event(crc->done, atomic_read_acquire(&crc->stop));
atomic_set(&crc->stop, 0);
}
@@ -1121,12 +1121,12 @@ static int lzo_decompress_threadfn(void *data)
struct dec_data *d = data;
while (1) {
- wait_event(d->go, atomic_read(&d->ready) ||
+ wait_event(d->go, atomic_read_acquire(&d->ready) ||
kthread_should_stop());
if (kthread_should_stop()) {
d->thr = NULL;
d->ret = -1;
- atomic_set(&d->stop, 1);
+ atomic_set_release(&d->stop, 1);
wake_up(&d->done);
break;
}
@@ -1139,7 +1139,7 @@ static int lzo_decompress_threadfn(void *data)
flush_icache_range((unsigned long)d->unc,
(unsigned long)d->unc + d->unc_len);
- atomic_set(&d->stop, 1);
+ atomic_set_release(&d->stop, 1);
wake_up(&d->done);
}
return 0;
@@ -1327,7 +1327,7 @@ static int load_image_lzo(struct swap_map_handle *handle,
}
if (crc->run_threads) {
- wait_event(crc->done, atomic_read(&crc->stop));
+ wait_event(crc->done, atomic_read_acquire(&crc->stop));
atomic_set(&crc->stop, 0);
crc->run_threads = 0;
}
@@ -1363,7 +1363,7 @@ static int load_image_lzo(struct swap_map_handle *handle,
pg = 0;
}
- atomic_set(&data[thr].ready, 1);
+ atomic_set_release(&data[thr].ready, 1);
wake_up(&data[thr].go);
}
@@ -1382,7 +1382,7 @@ static int load_image_lzo(struct swap_map_handle *handle,
for (run_threads = thr, thr = 0; thr < run_threads; thr++) {
wait_event(data[thr].done,
- atomic_read(&data[thr].stop));
+ atomic_read_acquire(&data[thr].stop));
atomic_set(&data[thr].stop, 0);
ret = data[thr].ret;
@@ -1413,7 +1413,7 @@ static int load_image_lzo(struct swap_map_handle *handle,
ret = snapshot_write_next(snapshot);
if (ret <= 0) {
crc->run_threads = thr + 1;
- atomic_set(&crc->ready, 1);
+ atomic_set_release(&crc->ready, 1);
wake_up(&crc->go);
goto out_finish;
}
@@ -1421,13 +1421,13 @@ static int load_image_lzo(struct swap_map_handle *handle,
}
crc->run_threads = thr;
- atomic_set(&crc->ready, 1);
+ atomic_set_release(&crc->ready, 1);
wake_up(&crc->go);
}
out_finish:
if (crc->run_threads) {
- wait_event(crc->done, atomic_read(&crc->stop));
+ wait_event(crc->done, atomic_read_acquire(&crc->stop));
atomic_set(&crc->stop, 0);
}
stop = ktime_get();
diff --git a/kernel/power/user.c b/kernel/power/user.c
index 77438954cc2b..672d4e28fa8a 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -26,6 +26,7 @@
#include "power.h"
+static bool need_wait;
#define SNAPSHOT_MINOR 231
@@ -79,7 +80,7 @@ static int snapshot_open(struct inode *inode, struct file *filp)
* Resuming. We may need to wait for the image device to
* appear.
*/
- wait_for_device_probe();
+ need_wait = true;
data->swap = -1;
data->mode = O_WRONLY;
@@ -171,6 +172,11 @@ static ssize_t snapshot_write(struct file *filp, const char __user *buf,
ssize_t res;
loff_t pg_offp = *offp & ~PAGE_MASK;
+ if (need_wait) {
+ wait_for_device_probe();
+ need_wait = false;
+ }
+
lock_system_sleep();
data = filp->private_data;
@@ -206,6 +212,11 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd,
loff_t size;
sector_t offset;
+ if (need_wait) {
+ wait_for_device_probe();
+ need_wait = false;
+ }
+
if (_IOC_TYPE(cmd) != SNAPSHOT_IOC_MAGIC)
return -ENOTTY;
if (_IOC_NR(cmd) > SNAPSHOT_IOC_MAXNR)
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-06-26 19:27:28 +0000