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Date: Mon, 4 Feb 2019 16:32:10 +0100
From: Christoph Hellwig <hch@....de>
To: rjw@...ysocki.net, lenb@...nel.org
Cc: linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] acpi: get rid of acpi_sleep_dispatch
No need for the array of structs of function pointers when we can just
call the handfull of functions directly.
This could be further cleaned up if acpi_gbl_reduced_hardware was defined
true in the ACPI_REDUCED_HARDWARE case, but that's material for the next
round.
Signed-off-by: Christoph Hellwig <hch@....de>
---
drivers/acpi/acpica/hwxfsleep.c | 96 +++++++--------------------------
include/acpi/actypes.h | 9 ----
2 files changed, 18 insertions(+), 87 deletions(-)
diff --git a/drivers/acpi/acpica/hwxfsleep.c b/drivers/acpi/acpica/hwxfsleep.c
index 3f22f7dd4556..f58b78eaec65 100644
--- a/drivers/acpi/acpica/hwxfsleep.c
+++ b/drivers/acpi/acpica/hwxfsleep.c
@@ -23,33 +23,6 @@ acpi_hw_set_firmware_waking_vector(struct acpi_table_facs *facs,
acpi_physical_address physical_address64);
#endif
-static acpi_status acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id);
-
-/*
- * Dispatch table used to efficiently branch to the various sleep
- * functions.
- */
-#define ACPI_SLEEP_FUNCTION_ID 0
-#define ACPI_WAKE_PREP_FUNCTION_ID 1
-#define ACPI_WAKE_FUNCTION_ID 2
-
-/* Legacy functions are optional, based upon ACPI_REDUCED_HARDWARE */
-
-static struct acpi_sleep_functions acpi_sleep_dispatch[] = {
- {ACPI_STRUCT_INIT(legacy_function,
- ACPI_HW_OPTIONAL_FUNCTION(acpi_hw_legacy_sleep)),
- ACPI_STRUCT_INIT(extended_function,
- acpi_hw_extended_sleep)},
- {ACPI_STRUCT_INIT(legacy_function,
- ACPI_HW_OPTIONAL_FUNCTION(acpi_hw_legacy_wake_prep)),
- ACPI_STRUCT_INIT(extended_function,
- acpi_hw_extended_wake_prep)},
- {ACPI_STRUCT_INIT(legacy_function,
- ACPI_HW_OPTIONAL_FUNCTION(acpi_hw_legacy_wake)),
- ACPI_STRUCT_INIT(extended_function,
- acpi_hw_extended_wake)}
-};
-
/*
* These functions are removed for the ACPI_REDUCED_HARDWARE case:
* acpi_set_firmware_waking_vector
@@ -209,53 +182,6 @@ acpi_status acpi_enter_sleep_state_s4bios(void)
ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
#endif /* !ACPI_REDUCED_HARDWARE */
-/*******************************************************************************
- *
- * FUNCTION: acpi_hw_sleep_dispatch
- *
- * PARAMETERS: sleep_state - Which sleep state to enter/exit
- * function_id - Sleep, wake_prep, or Wake
- *
- * RETURN: Status from the invoked sleep handling function.
- *
- * DESCRIPTION: Dispatch a sleep/wake request to the appropriate handling
- * function.
- *
- ******************************************************************************/
-static acpi_status acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id)
-{
- acpi_status status;
- struct acpi_sleep_functions *sleep_functions =
- &acpi_sleep_dispatch[function_id];
-
-#if (!ACPI_REDUCED_HARDWARE)
- /*
- * If the Hardware Reduced flag is set (from the FADT), we must
- * use the extended sleep registers (FADT). Note: As per the ACPI
- * specification, these extended registers are to be used for HW-reduced
- * platforms only. They are not general-purpose replacements for the
- * legacy PM register sleep support.
- */
- if (acpi_gbl_reduced_hardware) {
- status = sleep_functions->extended_function(sleep_state);
- } else {
- /* Legacy sleep */
-
- status = sleep_functions->legacy_function(sleep_state);
- }
-
- return (status);
-
-#else
- /*
- * For the case where reduced-hardware-only code is being generated,
- * we know that only the extended sleep registers are available
- */
- status = sleep_functions->extended_function(sleep_state);
- return (status);
-
-#endif /* !ACPI_REDUCED_HARDWARE */
-}
/*******************************************************************************
*
@@ -362,7 +288,12 @@ acpi_status acpi_enter_sleep_state(u8 sleep_state)
return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
}
- status = acpi_hw_sleep_dispatch(sleep_state, ACPI_SLEEP_FUNCTION_ID);
+#if !ACPI_REDUCED_HARDWARE
+ if (!acpi_gbl_reduced_hardware)
+ status = acpi_hw_legacy_sleep(sleep_state);
+ else
+#endif
+ status = acpi_hw_extended_sleep(sleep_state);
return_ACPI_STATUS(status);
}
@@ -388,8 +319,12 @@ acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep);
- status =
- acpi_hw_sleep_dispatch(sleep_state, ACPI_WAKE_PREP_FUNCTION_ID);
+#if !ACPI_REDUCED_HARDWARE
+ if (!acpi_gbl_reduced_hardware)
+ status = acpi_hw_legacy_wake_prep(sleep_state);
+ else
+#endif
+ status = acpi_hw_extended_wake_prep(sleep_state);
return_ACPI_STATUS(status);
}
@@ -413,7 +348,12 @@ acpi_status acpi_leave_sleep_state(u8 sleep_state)
ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
- status = acpi_hw_sleep_dispatch(sleep_state, ACPI_WAKE_FUNCTION_ID);
+#if !ACPI_REDUCED_HARDWARE
+ if (!acpi_gbl_reduced_hardware)
+ status = acpi_hw_legacy_wake(sleep_state);
+ else
+#endif
+ status = acpi_hw_extended_wake(sleep_state);
return_ACPI_STATUS(status);
}
diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index 2590627dbfcc..9b11d07e4363 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -885,15 +885,6 @@ typedef u8 acpi_adr_space_type;
#define ACPI_ENABLE_EVENT 1
#define ACPI_DISABLE_EVENT 0
-/* Sleep function dispatch */
-
-typedef acpi_status (*acpi_sleep_function) (u8 sleep_state);
-
-struct acpi_sleep_functions {
- acpi_sleep_function legacy_function;
- acpi_sleep_function extended_function;
-};
-
/*
* External ACPI object definition
*/
--
2.20.1
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