Commit-ID: ce5dae03973461e2a42098c53d62946b98baab42
Gitweb: http://git.kernel.org/tip/ce5dae03973461e2a42098c53d62946b98baab42
Author: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
AuthorDate: Fri, 15 Nov 2013 14:15:28 -0800
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Tue, 19 Nov 2013 19:09:42 +0100
sched_clock: Document 4Mhz vs 1Mhz decision
Bo Shen sent a patch to change this to 1Mhz instead of 4Mhz but according
to Russell King the use of 4Mhz was intentional. Add a comment to this
effect so that others don't try to change the code as well.
Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
Cc: Bo Shen <voice.shen@xxxxxxxxx>
Cc: Russell King <rmk@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
kernel/time/sched_clock.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/kernel/time/sched_clock.c b/kernel/time/sched_clock.c
index 68b7993..6c1b534 100644
--- a/kernel/time/sched_clock.c
+++ b/kernel/time/sched_clock.c
@@ -132,6 +132,10 @@ void __init sched_clock_register(u64 (*read)(void), int bits,
clocks_calc_mult_shift(&cd.mult, &cd.shift, rate, NSEC_PER_SEC, 3600);
r = rate;
+ /*
+ * Use 4MHz instead of 1MHz so that things like 1.832Mhz show as
+ * 1832Khz
+ */
if (r >= 4000000) {
r /= 1000000;
r_unit = 'M';
--
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