tree 723f3235be7ae26f588851fcf926f6b4efb7b226
parent aa9ea8421abee6f350a1e6fb6eb91c35159e628f
author Ke Wang <ke.wang@spreadtrum.com> 1481176930 +0800
committer Dmitry Shmidt <dimitrysh@google.com> 1486053897 -0800

ANDROID: sched: fix wrong truncation of walt_avg

The result of "__entry->walt_avg = (__entry->demand << 10)" will exceed
the range of "unsigned int", which will be truncated and make the trace
looks like as follows:

UnityMain-4588  [004]  6029.645672: walt_update_history:  4588(UnityMain): runtime 9928307 samples 1 event 4
			demand 9928307 walt 157 pelt 870 (hist: 9928307 9604307 8440077 87392 34144328) cpu 4
UnityMain-4588  [004]  6029.653658: walt_update_history:  4588(UnityMain): runtime 10000000 samples 1 event 4
			demand 10000000 walt 165 pelt 886 (hist: 10000000 9955691 6549308 64000 34144328) cpu 4

Fix this by using a u64 type instead of unsgined int type and make the
trace as below:

UnityMain-4617  [004]   117.613558: walt_update_history:  4617(UnityMain): runtime 5770597 samples 1 event 4
			demand 7038739 walt 720 pelt 680 (hist: 5770597 7680001 8904509 65596 156) cpu 4
UnityMain-4617  [004]   117.633560: walt_update_history:  4617(UnityMain): runtime 9911238 samples 1 event 4
			demand 9911238 walt 1014 pelt 769 (hist: 9911238 5770597 7680001 0 1664188058) cpu 4

Signed-off-by: Ke Wang <ke.wang@spreadtrum.com>
[AmitP: cherry-picked from aosp/android-3.18]
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>