On 05/22/2013 03:32 PM, Aaro Koskinen wrote:
Hi,
On Thu, May 02, 2013 at 01:48:12PM -0700, David Daney wrote:
From: David Daney <[email protected]>
As noted by Thomas Gleixner:
commit cdbedc61c8 (mips: Use generic idle loop) broke MIPS as I did
not realize that MIPS wants to invoke the wait instructions with
interrupts enabled.
Instead of enabling interrupts in arch_cpu_idle() as Thomas' initial
patch does, we follow Linus' suggestion of doing it in the assembly
code to prevent the compiler from rearranging things.
Signed-off-by: David Daney <[email protected]>
Reported-by: EunBong Song <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Jonas Gorski <[email protected]>
---
This is only very lightly tested, we need more testing before
declaring it the definitive fix.
I wonder what is the status of this patch? Or is there some alternative
fix?
I have Octeon+ board that hangs during 3.10-rc2 boot in spawn_ksoftirqd()
without this. Also, this patch does not apply cleanly to 3.10-rc2
anymore...
A.
Ralf has an alternate fix here:
http://git.linux-mips.org/pub/scm/ralf/upstream-linus.git
If all goes well, it will be merged soon.
David Daney
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