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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2020-01-23 16:00:56 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2020-01-23 16:00:56 +0100
commit322e929d196c27fa1bd50b389b800e9c30419bde (patch)
treeb54c5ea2ca3e8566ec95044488e549b670607be9 /kernel/power/snapshot.c
parent18451f9f9e5810b8bd1245c5ae166f257e0e2b9d (diff)
parentc052bf82c6b00ca27aab0859addc4b3159dfd3a4 (diff)
Merge back new material related to system-wide PM for v5.6.
Diffstat (limited to 'kernel/power/snapshot.c')
-rw-r--r--kernel/power/snapshot.c28
1 files changed, 16 insertions, 12 deletions
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index d65f2d5ab694..ddade80ad276 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -8,7 +8,7 @@
* Copyright (C) 2006 Rafael J. Wysocki <rjw@sisk.pl>
*/
-#define pr_fmt(fmt) "PM: " fmt
+#define pr_fmt(fmt) "PM: hibernation: " fmt
#include <linux/version.h>
#include <linux/module.h>
@@ -1566,9 +1566,7 @@ static unsigned long preallocate_image_highmem(unsigned long nr_pages)
*/
static unsigned long __fraction(u64 x, u64 multiplier, u64 base)
{
- x *= multiplier;
- do_div(x, base);
- return (unsigned long)x;
+ return div64_u64(x * multiplier, base);
}
static unsigned long preallocate_highmem_fraction(unsigned long nr_pages,
@@ -1705,16 +1703,20 @@ int hibernate_preallocate_memory(void)
ktime_t start, stop;
int error;
- pr_info("Preallocating image memory... ");
+ pr_info("Preallocating image memory\n");
start = ktime_get();
error = memory_bm_create(&orig_bm, GFP_IMAGE, PG_ANY);
- if (error)
+ if (error) {
+ pr_err("Cannot allocate original bitmap\n");
goto err_out;
+ }
error = memory_bm_create(&copy_bm, GFP_IMAGE, PG_ANY);
- if (error)
+ if (error) {
+ pr_err("Cannot allocate copy bitmap\n");
goto err_out;
+ }
alloc_normal = 0;
alloc_highmem = 0;
@@ -1804,8 +1806,11 @@ int hibernate_preallocate_memory(void)
alloc -= pages;
pages += pages_highmem;
pages_highmem = preallocate_image_highmem(alloc);
- if (pages_highmem < alloc)
+ if (pages_highmem < alloc) {
+ pr_err("Image allocation is %lu pages short\n",
+ alloc - pages_highmem);
goto err_out;
+ }
pages += pages_highmem;
/*
* size is the desired number of saveable pages to leave in
@@ -1836,13 +1841,12 @@ int hibernate_preallocate_memory(void)
out:
stop = ktime_get();
- pr_cont("done (allocated %lu pages)\n", pages);
+ pr_info("Allocated %lu pages for snapshot\n", pages);
swsusp_show_speed(start, stop, pages, "Allocated");
return 0;
err_out:
- pr_cont("\n");
swsusp_free();
return -ENOMEM;
}
@@ -1976,7 +1980,7 @@ asmlinkage __visible int swsusp_save(void)
{
unsigned int nr_pages, nr_highmem;
- pr_info("Creating hibernation image:\n");
+ pr_info("Creating image:\n");
drain_local_pages(NULL);
nr_pages = count_data_pages();
@@ -2010,7 +2014,7 @@ asmlinkage __visible int swsusp_save(void)
nr_copy_pages = nr_pages;
nr_meta_pages = DIV_ROUND_UP(nr_pages * sizeof(long), PAGE_SIZE);
- pr_info("Hibernation image created (%d pages copied)\n", nr_pages);
+ pr_info("Image created (%d pages copied)\n", nr_pages);
return 0;
}