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| author | Len Brown <len.brown@intel.com> | 2012-07-27 02:08:54 +0200 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2012-07-31 03:11:25 +0200 |
| commit | 3f6f49c7854c9294119437a82c5b35be78f9cea6 (patch) | |
| tree | ad2428e403a0d76f2327a1c0afccd12a6820e661 /drivers/acpi/acpica/achware.h | |
| parent | ACPI/x86: revert 'x86, acpi: Call acpi_enter_sleep_state via an asmlinkage C ... (diff) | |
| download | linux-3f6f49c7854c9294119437a82c5b35be78f9cea6.tar.xz linux-3f6f49c7854c9294119437a82c5b35be78f9cea6.zip | |
ACPI: delete _GTS/_BFS support
_GTS and _BFS were added to the suspend/resume flow
in the ACPI 2.0 specification.
Linux dutifully implemented _GTS and _BFS.
We discovered that it was rarely seen in systems
in the field. Further, some of those systems had
AML so bogus that it could never work -- proof that
no other operating system supports _GTS and _BFS.
So we made _GTS and _BFS optional via modparam,
and disabled them by default.
But we've had to complicate some code to keep
this support in the kernel, as these methods are defined
to be evaluated very close to sleep entry and exit.
Indeed, no other AML is ever evaluated with interrupts off.
We have submitted a proposal for _GTS and _BFS
to be officially removed from the ACPI specification
on the next revision. Here we remove it from Linux.
Signed-off-by: Len Brown <len.brown@intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/acpi/acpica/achware.h')
| -rw-r--r-- | drivers/acpi/acpica/achware.h | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/acpi/acpica/achware.h b/drivers/acpi/acpica/achware.h index 5ccb99ae3a6f..5de4ec72766d 100644 --- a/drivers/acpi/acpica/achware.h +++ b/drivers/acpi/acpica/achware.h @@ -83,22 +83,22 @@ acpi_status acpi_hw_clear_acpi_status(void); /* * hwsleep - sleep/wake support (Legacy sleep registers) */ -acpi_status acpi_hw_legacy_sleep(u8 sleep_state, u8 flags); +acpi_status acpi_hw_legacy_sleep(u8 sleep_state); -acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state, u8 flags); +acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state); -acpi_status acpi_hw_legacy_wake(u8 sleep_state, u8 flags); +acpi_status acpi_hw_legacy_wake(u8 sleep_state); /* * hwesleep - sleep/wake support (Extended FADT-V5 sleep registers) */ void acpi_hw_execute_sleep_method(char *method_name, u32 integer_argument); -acpi_status acpi_hw_extended_sleep(u8 sleep_state, u8 flags); +acpi_status acpi_hw_extended_sleep(u8 sleep_state); -acpi_status acpi_hw_extended_wake_prep(u8 sleep_state, u8 flags); +acpi_status acpi_hw_extended_wake_prep(u8 sleep_state); -acpi_status acpi_hw_extended_wake(u8 sleep_state, u8 flags); +acpi_status acpi_hw_extended_wake(u8 sleep_state); /* * hwvalid - Port I/O with validation |