45 lines
1.4 KiB
Diff
45 lines
1.4 KiB
Diff
From 4fec4a2d70efa390268d1098bd4b008dda0e399e Mon Sep 17 00:00:00 2001
|
|
From: Thomas Gleixner <tglx@linutronix.de>
|
|
Date: Thu, 2 May 2013 13:33:52 +0000
|
|
Subject: [PATCH 3/3] MIPS: Enable interrupts in arch_cpu_idle()
|
|
|
|
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. Don't ask why that works correctly; Ralf suggested
|
|
to get thoroughly drunk before even thinking about it. Looking sober
|
|
at commit c65a5480 ([MIPS] Fix potential latency problem due to
|
|
non-atomic cpu_wait) is not recommended.
|
|
|
|
Enable interrupts in arch_cpu_idle() on mips to repair the issue.
|
|
|
|
Reported-and-tested-by: Jonas Gorski <jogo@openwrt.org>
|
|
Reported-by: EunBong Song <eunb.song@samsung.com>
|
|
Booze-recommended-by: Ralf Baechle <ralf@linux-mips.org>
|
|
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
|
|
---
|
|
arch/mips/kernel/process.c | 9 +++++++--
|
|
1 file changed, 7 insertions(+), 2 deletions(-)
|
|
|
|
--- a/arch/mips/kernel/process.c
|
|
+++ b/arch/mips/kernel/process.c
|
|
@@ -51,13 +51,18 @@ void arch_cpu_idle_dead(void)
|
|
}
|
|
#endif
|
|
|
|
-void arch_cpu_idle(void)
|
|
+static void smtc_idle_hook(void)
|
|
{
|
|
#ifdef CONFIG_MIPS_MT_SMTC
|
|
extern void smtc_idle_loop_hook(void);
|
|
-
|
|
smtc_idle_loop_hook();
|
|
#endif
|
|
+}
|
|
+
|
|
+void arch_cpu_idle(void)
|
|
+{
|
|
+ local_irq_enable();
|
|
+ smtc_idle_hook();
|
|
if (cpu_wait)
|
|
(*cpu_wait)();
|
|
else
|