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| author | Hanjun Guo | 2015-05-11 06:17:13 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki | 2015-05-13 23:28:14 +0200 |
| commit | 25956b6612601cf36022392ffa83f6bf97939bcd (patch) | |
| tree | f3b8efbce1c45c7ccf5796e38046f13477d22a76 /include/linux/acpi.h | |
| parent | Linux 4.1-rc3 (diff) | |
| download | kernel-qcow2-linux-25956b6612601cf36022392ffa83f6bf97939bcd.tar.gz kernel-qcow2-linux-25956b6612601cf36022392ffa83f6bf97939bcd.tar.xz kernel-qcow2-linux-25956b6612601cf36022392ffa83f6bf97939bcd.zip | |
ACPI / processor: Introduce invalid_logical_cpuid()
In ACPI processor drivers, we use direct comparisons of cpu logical
id with -1 which are error prone in case logical cpuid is accidentally
assinged an error code and prevents us from returning an error-encoding
cpuid directly in some cases.
So introduce invalid_logical_cpuid() to identify cpu with invalid
logical cpu num, then it will be used to replace the direct comparisons
with -1.
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/acpi.h')
| -rw-r--r-- | include/linux/acpi.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/acpi.h b/include/linux/acpi.h index e4da5e35e29c..913b49f9a6e6 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -158,6 +158,11 @@ typedef u32 phys_cpuid_t; #define PHYS_CPUID_INVALID (phys_cpuid_t)(-1) #endif +static inline bool invalid_logical_cpuid(u32 cpuid) +{ + return (int)cpuid < 0; +} + #ifdef CONFIG_ACPI_HOTPLUG_CPU /* Arch dependent functions for cpu hotplug support */ int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu); |