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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>
151 lines
4 KiB
C
151 lines
4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* acpi_lpat.c - LPAT table processing functions
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*
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* Copyright (C) 2015 Intel Corporation. All rights reserved.
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*/
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#include <linux/export.h>
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#include <linux/acpi.h>
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#include <acpi/acpi_lpat.h>
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/**
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* acpi_lpat_raw_to_temp(): Return temperature from raw value through
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* LPAT conversion table
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*
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* @lpat_table: the temperature_raw mapping table structure
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* @raw: the raw value, used as a key to get the temperature from the
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* above mapping table
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*
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* A positive converted temperature value will be returned on success,
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* a negative errno will be returned in error cases.
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*/
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int acpi_lpat_raw_to_temp(struct acpi_lpat_conversion_table *lpat_table,
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int raw)
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{
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int i, delta_temp, delta_raw, temp;
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struct acpi_lpat *lpat = lpat_table->lpat;
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for (i = 0; i < lpat_table->lpat_count - 1; i++) {
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if ((raw >= lpat[i].raw && raw <= lpat[i+1].raw) ||
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(raw <= lpat[i].raw && raw >= lpat[i+1].raw))
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break;
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}
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if (i == lpat_table->lpat_count - 1)
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return -ENOENT;
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delta_temp = lpat[i+1].temp - lpat[i].temp;
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delta_raw = lpat[i+1].raw - lpat[i].raw;
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temp = lpat[i].temp + (raw - lpat[i].raw) * delta_temp / delta_raw;
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return temp;
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}
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EXPORT_SYMBOL_GPL(acpi_lpat_raw_to_temp);
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/**
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* acpi_lpat_temp_to_raw(): Return raw value from temperature through
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* LPAT conversion table
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*
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* @lpat_table: the temperature_raw mapping table
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* @temp: the temperature, used as a key to get the raw value from the
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* above mapping table
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*
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* The raw value will be returned on success,
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* a negative errno will be returned in error cases.
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*/
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int acpi_lpat_temp_to_raw(struct acpi_lpat_conversion_table *lpat_table,
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int temp)
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{
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int i, delta_temp, delta_raw, raw;
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struct acpi_lpat *lpat = lpat_table->lpat;
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for (i = 0; i < lpat_table->lpat_count - 1; i++) {
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if (temp >= lpat[i].temp && temp <= lpat[i+1].temp)
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break;
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}
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if (i == lpat_table->lpat_count - 1)
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return -ENOENT;
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delta_temp = lpat[i+1].temp - lpat[i].temp;
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delta_raw = lpat[i+1].raw - lpat[i].raw;
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raw = lpat[i].raw + (temp - lpat[i].temp) * delta_raw / delta_temp;
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return raw;
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}
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EXPORT_SYMBOL_GPL(acpi_lpat_temp_to_raw);
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/**
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* acpi_lpat_get_conversion_table(): Parse ACPI LPAT table if present.
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*
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* @handle: Handle to acpi device
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*
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* Parse LPAT table to a struct of type acpi_lpat_table. On success
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* it returns a pointer to newly allocated table. This table must
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* be freed by the caller when finished processing, using a call to
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* acpi_lpat_free_conversion_table.
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*/
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struct acpi_lpat_conversion_table *acpi_lpat_get_conversion_table(acpi_handle
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handle)
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{
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struct acpi_lpat_conversion_table *lpat_table = NULL;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object *obj_p, *obj_e;
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int *lpat, i;
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acpi_status status;
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status = acpi_evaluate_object(handle, "LPAT", NULL, &buffer);
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if (ACPI_FAILURE(status))
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return NULL;
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obj_p = (union acpi_object *)buffer.pointer;
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if (!obj_p || (obj_p->type != ACPI_TYPE_PACKAGE) ||
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(obj_p->package.count % 2) || (obj_p->package.count < 4))
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goto out;
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lpat = kzalloc_objs(int, obj_p->package.count);
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if (!lpat)
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goto out;
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for (i = 0; i < obj_p->package.count; i++) {
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obj_e = &obj_p->package.elements[i];
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if (obj_e->type != ACPI_TYPE_INTEGER) {
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kfree(lpat);
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goto out;
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}
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lpat[i] = (s64)obj_e->integer.value;
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}
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lpat_table = kzalloc_obj(*lpat_table);
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if (!lpat_table) {
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kfree(lpat);
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goto out;
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}
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lpat_table->lpat = (struct acpi_lpat *)lpat;
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lpat_table->lpat_count = obj_p->package.count / 2;
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out:
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kfree(buffer.pointer);
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return lpat_table;
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}
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EXPORT_SYMBOL_GPL(acpi_lpat_get_conversion_table);
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/**
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* acpi_lpat_free_conversion_table(): Free LPAT table.
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*
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* @lpat_table: the temperature_raw mapping table structure
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*
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* Frees the LPAT table previously allocated by a call to
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* acpi_lpat_get_conversion_table.
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*/
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void acpi_lpat_free_conversion_table(struct acpi_lpat_conversion_table
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*lpat_table)
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{
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if (lpat_table) {
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kfree(lpat_table->lpat);
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kfree(lpat_table);
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}
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}
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EXPORT_SYMBOL_GPL(acpi_lpat_free_conversion_table);
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