aboutsummaryrefslogtreecommitdiff
path: root/arch/arm
diff options
context:
space:
mode:
authorArnd Bergmann <arnd@arndb.de>2012-08-15 20:51:54 +0000
committerArnd Bergmann <arnd@arndb.de>2012-08-23 17:16:42 +0200
commitc7a9b09b1a4a1fbccb2ec409daec95f9068d77c0 (patch)
treef767b4391b4a20046a5649e5efae80428506453f /arch/arm
parentd9875690d9b89a866022ff49e3fcea892345ad92 (diff)
downloadlinux-linaro-stable-c7a9b09b1a4a1fbccb2ec409daec95f9068d77c0.tar.gz
ARM: omap: allow building omap44xx without SMP
The new omap4 cpuidle implementation currently requires ARCH_NEEDS_CPU_IDLE_COUPLED, which only works on SMP. This patch makes it possible to build a non-SMP kernel for that platform. This is not normally desired for end-users but can be useful for testing. Without this patch, building rand-0y2jSKT results in: drivers/cpuidle/coupled.c: In function 'cpuidle_coupled_poke': drivers/cpuidle/coupled.c:317:3: error: implicit declaration of function '__smp_call_function_single' [-Werror=implicit-function-declaration] It's not clear if this patch is the best solution for the problem at hand. I have made sure that we can now build the kernel in all configurations, but that does not mean it will actually work on an OMAP44xx. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Cc: Kevin Hilman <khilman@ti.com> Cc: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-omap2/Kconfig2
-rw-r--r--arch/arm/mach-omap2/cpuidle44xx.c3
2 files changed, 3 insertions, 2 deletions
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index dd2db025f778..66a8be331caf 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -62,7 +62,7 @@ config ARCH_OMAP4
select PM_OPP if PM
select USB_ARCH_HAS_EHCI if USB_SUPPORT
select ARM_CPU_SUSPEND if PM
- select ARCH_NEEDS_CPU_IDLE_COUPLED
+ select ARCH_NEEDS_CPU_IDLE_COUPLED if SMP
config SOC_OMAP5
bool "TI OMAP5"
diff --git a/arch/arm/mach-omap2/cpuidle44xx.c b/arch/arm/mach-omap2/cpuidle44xx.c
index ee05e193fc61..288bee6cbb76 100644
--- a/arch/arm/mach-omap2/cpuidle44xx.c
+++ b/arch/arm/mach-omap2/cpuidle44xx.c
@@ -238,8 +238,9 @@ int __init omap4_idle_init(void)
for_each_cpu(cpu_id, cpu_online_mask) {
dev = &per_cpu(omap4_idle_dev, cpu_id);
dev->cpu = cpu_id;
+#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
dev->coupled_cpus = *cpu_online_mask;
-
+#endif
cpuidle_register_driver(&omap4_idle_driver);
if (cpuidle_register_device(dev)) {