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authorChen Gang <gang.chen.5i5j@gmail.com>2014-04-25 08:44:59 +0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-04-28 13:02:12 +0200
commit4881f603d7b82df2bc15efd2a272f973a3bf8df1 (patch)
tree8bbe70d82d020e1203059d16936de6ca9b191f32 /kernel/power/hibernate.c
parentd1db0eea852497762cab43b905b879dfcd3b8987 (diff)
PM / hibernate: use unsigned local variables in swsusp_show_speed()
do_div() needs 'u64' type, or it reports warning. And negative number is meaningless for "speed", so change all signed to unsigned within swsusp_show_speed(). The related warning (with allmodconfig for unicore32): CC kernel/power/hibernate.o kernel/power/hibernate.c: In function ‘swsusp_show_speed’: kernel/power/hibernate.c:237: warning: comparison of distinct pointer types lacks a cast Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> [rjw: Subject] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/power/hibernate.c')
-rw-r--r--kernel/power/hibernate.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index f4f2073711d3..de4b989cc8fd 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -228,19 +228,23 @@ static void platform_recover(int platform_mode)
void swsusp_show_speed(struct timeval *start, struct timeval *stop,
unsigned nr_pages, char *msg)
{
- s64 elapsed_centisecs64;
- int centisecs;
- int k;
- int kps;
+ u64 elapsed_centisecs64;
+ unsigned int centisecs;
+ unsigned int k;
+ unsigned int kps;
elapsed_centisecs64 = timeval_to_ns(stop) - timeval_to_ns(start);
+ /*
+ * If "(s64)elapsed_centisecs64 < 0", it will print long elapsed time,
+ * it is obvious enough for what went wrong.
+ */
do_div(elapsed_centisecs64, NSEC_PER_SEC / 100);
centisecs = elapsed_centisecs64;
if (centisecs == 0)
centisecs = 1; /* avoid div-by-zero */
k = nr_pages * (PAGE_SIZE / 1024);
kps = (k * 100) / centisecs;
- printk(KERN_INFO "PM: %s %d kbytes in %d.%02d seconds (%d.%02d MB/s)\n",
+ printk(KERN_INFO "PM: %s %u kbytes in %u.%02u seconds (%u.%02u MB/s)\n",
msg, k,
centisecs / 100, centisecs % 100,
kps / 1000, (kps % 1000) / 10);