mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-03-03 18:28:01 +01:00
bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
121 lines
2.5 KiB
C
121 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2005 Intel Corporation
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* Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
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*
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* Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
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* - Added _PDC for platforms with Intel CPUs
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*/
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#define pr_fmt(fmt) "ACPI: " fmt
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#include <linux/slab.h>
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#include <linux/acpi.h>
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#include <acpi/processor.h>
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#include "internal.h"
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static void acpi_set_pdc_bits(u32 *buf)
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{
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buf[0] = ACPI_PDC_REVISION_ID;
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buf[1] = 1;
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buf[2] = 0;
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/* Twiddle arch-specific bits needed for _PDC */
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arch_acpi_set_proc_cap_bits(&buf[2]);
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}
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static struct acpi_object_list *acpi_processor_alloc_pdc(void)
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{
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struct acpi_object_list *obj_list;
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union acpi_object *obj;
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u32 *buf;
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/* allocate and initialize pdc. It will be used later. */
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obj_list = kmalloc_obj(struct acpi_object_list);
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if (!obj_list)
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goto out;
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obj = kmalloc_obj(union acpi_object);
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if (!obj) {
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kfree(obj_list);
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goto out;
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}
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buf = kmalloc(12, GFP_KERNEL);
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if (!buf) {
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kfree(obj);
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kfree(obj_list);
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goto out;
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}
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acpi_set_pdc_bits(buf);
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obj->type = ACPI_TYPE_BUFFER;
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obj->buffer.length = 12;
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obj->buffer.pointer = (u8 *) buf;
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obj_list->count = 1;
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obj_list->pointer = obj;
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return obj_list;
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out:
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pr_err("Memory allocation error\n");
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return NULL;
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}
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/*
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* _PDC is required for a BIOS-OS handshake for most of the newer
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* ACPI processor features.
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*/
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static acpi_status
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acpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in)
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{
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acpi_status status = AE_OK;
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status = acpi_evaluate_object(handle, "_PDC", pdc_in, NULL);
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if (ACPI_FAILURE(status))
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acpi_handle_debug(handle,
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"Could not evaluate _PDC, using legacy perf control\n");
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return status;
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}
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void acpi_processor_set_pdc(acpi_handle handle)
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{
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struct acpi_object_list *obj_list;
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if (arch_has_acpi_pdc() == false)
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return;
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obj_list = acpi_processor_alloc_pdc();
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if (!obj_list)
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return;
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acpi_processor_eval_pdc(handle, obj_list);
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kfree(obj_list->pointer->buffer.pointer);
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kfree(obj_list->pointer);
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kfree(obj_list);
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}
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static acpi_status __init
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early_init_pdc(acpi_handle handle, u32 lvl, void *context, void **rv)
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{
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if (processor_physically_present(handle) == false)
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return AE_OK;
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acpi_processor_set_pdc(handle);
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return AE_OK;
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}
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void __init acpi_early_processor_set_pdc(void)
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{
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acpi_proc_quirk_mwait_check();
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acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT,
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ACPI_UINT32_MAX,
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early_init_pdc, NULL, NULL, NULL);
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acpi_get_devices(ACPI_PROCESSOR_DEVICE_HID, early_init_pdc, NULL, NULL);
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}
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