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ARM64 / ACPI: make acpi_map_gic_cpu_interface() as void function

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Since the only caller of acpi_parse_gic_cpu_interface() doesn't
need the return value, make it have a void return type to avoid
introducing subtle bugs, and update the comments of the function
accordingly.

Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Hanjun Guo 2015-03-27 12:14:36 +00:00 committed by Will Deacon
parent ec81ad4eca
commit 7676fa70fe
1 changed files with 9 additions and 14 deletions
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23
arch/arm64/kernel/acpi.c
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@ -98,12 +98,8 @@ void __init __acpi_unmap_table(char *map, unsigned long size)
/**
* acpi_map_gic_cpu_interface - generates a logical cpu number
* and map to MPIDR represented by GICC structure
* @mpidr: CPU's hardware id to register, MPIDR represented in MADT
* @enabled: this cpu is enabled or not
*
* Returns the logical cpu number which maps to MPIDR
*/
static int __init
static void __init
acpi_map_gic_cpu_interface(struct acpi_madt_generic_interrupt *processor)
{
int i;
@ -112,17 +108,17 @@ acpi_map_gic_cpu_interface(struct acpi_madt_generic_interrupt *processor)
if (mpidr == INVALID_HWID) {
pr_info("Skip MADT cpu entry with invalid MPIDR\n");
return -EINVAL;
return;
}
total_cpus++;
if (!enabled)
return -EINVAL;
return;
if (enabled_cpus >= NR_CPUS) {
pr_warn("NR_CPUS limit of %d reached, Processor %d/0x%llx ignored.\n",
NR_CPUS, total_cpus, mpidr);
return -EINVAL;
return;
}
/* Check if GICC structure of boot CPU is available in the MADT */
@ -130,7 +126,7 @@ acpi_map_gic_cpu_interface(struct acpi_madt_generic_interrupt *processor)
if (bootcpu_valid) {
pr_err("Firmware bug, duplicate CPU MPIDR: 0x%llx in MADT\n",
mpidr);
return -EINVAL;
return;
}
bootcpu_valid = true;
@ -145,28 +141,27 @@ acpi_map_gic_cpu_interface(struct acpi_madt_generic_interrupt *processor)
if (cpu_logical_map(i) == mpidr) {
pr_err("Firmware bug, duplicate CPU MPIDR: 0x%llx in MADT\n",
mpidr);
return -EINVAL;
return;
}
}
if (!acpi_psci_present())
return -EOPNOTSUPP;
return;
cpu_ops[enabled_cpus] = cpu_get_ops("psci");
/* CPU 0 was already initialized */
if (enabled_cpus) {
if (!cpu_ops[enabled_cpus])
return -EINVAL;
return;
if (cpu_ops[enabled_cpus]->cpu_init(NULL, enabled_cpus))
return -EOPNOTSUPP;
return;
/* map the logical cpu id to cpu MPIDR */
cpu_logical_map(enabled_cpus) = mpidr;
}
enabled_cpus++;
return enabled_cpus;
}
static int __init