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ARM: 8741/1: B15: fix unused label warnings

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The new conditionally compiled code leaves some labels and one
variable unreferenced when CONFIG_HOTPLUG_CPU and CONFIG_PM_SLEEP
are disabled:

arch/arm/mm/cache-b15-rac.c: In function 'b15_rac_init':
arch/arm/mm/cache-b15-rac.c:353:1: error: label 'out_unmap' defined but not used [-Werror=unused-label]
 out_unmap:
 ^~~~~~~~~
arch/arm/mm/cache-b15-rac.c:351:1: error: label 'out_cpu_dead' defined but not used [-Werror=unused-label]
 out_cpu_dead:
 ^~~~~~~~~~~~
At top level:
arch/arm/mm/cache-b15-rac.c:53:12: error: 'rac_config0_reg' defined but not used [-Werror=unused-variable]

This replaces the existing #ifdef conditionals with IS_ENABLED()
checks that let the compiler figure out for itself which code to
drop.

Fixes: 55de88778f ("ARM: 8726/1: B15: Add CPU hotplug awareness")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Arnd Bergmann 2018-01-08 14:21:49 +01:00 committed by Russell King
parent 636e645f1f
commit a5281feafd
1 changed files with 11 additions and 15 deletions
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26
arch/arm/mm/cache-b15-rac.c
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@ -50,6 +50,7 @@ extern void v7_flush_kern_cache_all(void);
static void __iomem *b15_rac_base;
static DEFINE_SPINLOCK(rac_lock);
static u32 rac_config0_reg;
/* Initialization flag to avoid checking for b15_rac_base, and to prevent
@ -175,7 +176,6 @@ static struct notifier_block b15_rac_reboot_nb = {
.notifier_call = b15_rac_reboot_notifier,
};
#ifdef CONFIG_HOTPLUG_CPU
/* The CPU hotplug case is the most interesting one, we basically need to make
* sure that the RAC is disabled for the entire system prior to having a CPU
* die, in particular prior to this dying CPU having exited the coherency
@ -253,9 +253,7 @@ static int b15_rac_dead_cpu(unsigned int cpu)
return 0;
}
#endif /* CONFIG_HOTPLUG_CPU */
#ifdef CONFIG_PM_SLEEP
static int b15_rac_suspend(void)
{
/* Suspend the read-ahead cache oeprations, forcing our cache
@ -286,7 +284,6 @@ static struct syscore_ops b15_rac_syscore_ops = {
.suspend = b15_rac_suspend,
.resume = b15_rac_resume,
};
#endif
static int __init b15_rac_init(void)
{
@ -315,23 +312,22 @@ static int __init b15_rac_init(void)
goto out;
}
#ifdef CONFIG_HOTPLUG_CPU
ret = cpuhp_setup_state_nocalls(CPUHP_AP_ARM_CACHE_B15_RAC_DEAD,
if (IS_ENABLED(CONFIG_HOTPLUG_CPU)) {
ret = cpuhp_setup_state_nocalls(CPUHP_AP_ARM_CACHE_B15_RAC_DEAD,
"arm/cache-b15-rac:dead",
NULL, b15_rac_dead_cpu);
if (ret)
goto out_unmap;
if (ret)
goto out_unmap;
ret = cpuhp_setup_state_nocalls(CPUHP_AP_ARM_CACHE_B15_RAC_DYING,
ret = cpuhp_setup_state_nocalls(CPUHP_AP_ARM_CACHE_B15_RAC_DYING,
"arm/cache-b15-rac:dying",
NULL, b15_rac_dying_cpu);
if (ret)
goto out_cpu_dead;
#endif
if (ret)
goto out_cpu_dead;
}
#ifdef CONFIG_PM_SLEEP
register_syscore_ops(&b15_rac_syscore_ops);
#endif
if (IS_ENABLED(CONFIG_PM_SLEEP))
register_syscore_ops(&b15_rac_syscore_ops);
spin_lock(&rac_lock);
reg = __raw_readl(b15_rac_base + RAC_CONFIG0_REG);