diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-08-28 13:08:14 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-09-26 14:39:54 +0100 |
| commit | 195b58add463f697fb802ed55e26759094d40a54 (patch) | |
| tree | d3523c21a3bb610a87672356770a83c1e3c0ca8d /arch/arm/kernel/psci.c | |
| parent | 8b521cb2947d8811b4cf7fc6a7a6ebde35218243 (diff) | |
ARM: Avoid writing to control register on every exception
If we are not changing the control register value, avoid writing to it.
Writes to the control register can be very expensive, taking around a
hundred cycles or so.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/psci.c')
0 files changed, 0 insertions, 0 deletions