On 07/04/2013 05:57 AM, Rafael J. Wysocki wrote:
> On Tuesday, July 02, 2013 10:01:27 PM Aaron Lu wrote:
>> Drivers may need to make policy decisions based on the OS that the firmware
>> believes it's interacting with. ACPI firmware will make a series of _OSI
>> calls, starting from the oldest OS version they support and ending with the
>> most recent. This patchset adds a function in ACPI OSL layer to return the
>> last successful call so that drivers know what the firmware's expecting.
>>
>> Based on a patch by Matthew Garrett <matthew.garrett@xxxxxxxxxx>, which
>> is again based on a patch by Seth Forshee <seth.forshee@xxxxxxxxxxxxx>.
>>
>> Changelog-by: Matthew Garrett <matthew.garrett@xxxxxxxxxx>
>> Signed-off-by: Aaron Lu <aaron.lu@xxxxxxxxx>
>> Cc: Matthew Garrett <matthew.garrett@xxxxxxxxxx>
>> Cc: Seth Forshee <seth.forshee@xxxxxxxxxxxxx>
>> ---
>> drivers/acpi/osl.c | 6 ++++++
>> include/linux/acpi.h | 6 ++++++
>> 2 files changed, 12 insertions(+)
>>
>> diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
>> index 6ab2c35..7ebf07d 100644
>> --- a/drivers/acpi/osl.c
>> +++ b/drivers/acpi/osl.c
>> @@ -1799,3 +1799,9 @@ void alloc_acpi_hp_work(acpi_handle handle, u32 type, void *context,
>> kfree(hp_work);
>> }
>> EXPORT_SYMBOL_GPL(alloc_acpi_hp_work);
>> +
>> +u8 acpi_osi_version(void)
>> +{
>> + return acpi_gbl_osi_data;
>> +}
>
> Actually, is there a reason not to make this static inline and put it into
> the header?
Ah right, thanks for the suggestion.
Patch updated:
From: Aaron Lu <aaron.lu@xxxxxxxxx>
Subject: [PATCH updated 2/2] ACPI / OSL: add a wrapper function to return OSI version
Drivers may need to make policy decisions based on the OS that the firmware
believes it's interacting with. ACPI firmware will make a series of _OSI
calls, starting from the oldest OS version they support and ending with the
most recent. This patchset adds a function in ACPI OSL layer to return the
last successful call so that drivers know what the firmware's expecting.
Based on a patch by Matthew Garrett <matthew.garrett@xxxxxxxxxx>, which
is again based on a patch by Seth Forshee <seth.forshee@xxxxxxxxxxxxx>.
Signed-off-by: Aaron Lu <aaron.lu@xxxxxxxxx>
---
include/linux/acpi.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 353ba25..7969bf8 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -578,4 +578,10 @@ acpi_handle_printk(const char *level, void *handle, const char *fmt, ...) {}
})
#endif
+#ifdef CONFIG_ACPI
+static inline u8 acpi_osi_version(void) { return acpi_gbl_osi_data; }
+#else
+static inline u8 acpi_osi_version(void) { return 0; }
+#endif
+
#endif /*_LINUX_ACPI_H*/
--
1.8.3.2.10.g43d11f4
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