Kevin Hilman 246eb7f0ed cpuidle: always return with interrupts enabled ... In the case where cpuidle_idle_call() returns before changing state due to a need_resched(), it was returning with IRQs disabled. The idle path assumes that the platform specific idle code returns with interrupts enabled (although this too is undocumented AFAICT) and on ARM we have a WARN_ON(!(irqs_disabled()) when returning from the idle loop, so the user-visible effects were only a warning since interrupts were eventually re-enabled later. On x86, this same problem exists, but there is no WARN_ON() to detect it. As on ARM, the interrupts are eventually re-enabled, so I'm not sure of any actual bugs triggered by this. It's primarily a correctness/consistency fix. This patch ensures IRQs are (re)enabled before returning. Reported-by: Hemanth V <hemanthv@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Len Brown <len.brown@intel.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Tested-by: Martin Michlmayr <tbm@cyrius.com> Cc: <stable@kernel.org> [2.6.31.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2009-10-29 07:39:31 -07:00
..
governors	cpuidle: menu governor: reduce latency on exit	2009-09-22 07:17:45 -07:00
cpuidle.c	cpuidle: always return with interrupts enabled	2009-10-29 07:39:31 -07:00
cpuidle.h
driver.c
governor.c	cpuidle: remove unused exports	2007-10-29 17:27:50 -04:00
Kconfig	ACPI: CONFIG_CPU_IDLE=ACPI by default	2007-11-19 22:22:37 -05:00
Makefile
sysfs.c	cpuidle: make sysfs attributes sysdev class attributes	2008-08-12 16:07:28 -07:00