Commit 96f4a4d5 authored by Ben Horgan's avatar Ben Horgan Committed by Catalin Marinas
Browse files

ACPI: Define acpi_put_table cleanup handler and acpi_get_table_pointer() helper 



Define a cleanup helper for use with __free to release the acpi table when
the pointer goes out of scope. Also, introduce the helper
acpi_get_table_pointer() to simplify a commonly used pattern involving
acpi_get_table().

These are first used in a subsequent commit.

Reviewed-by: default avatarGavin Shan <gshan@redhat.com>
Reviewed-by: default avatarJonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: default avatarShaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Reviewed-by: default avatarFenghua Yu <fenghuay@nvidia.com>
Tested-by: default avatarFenghua Yu <fenghuay@nvidia.com>
Tested-by: default avatarCarl Worth <carl@os.amperecomputing.com>
Tested-by: default avatarGavin Shan <gshan@redhat.com>
Tested-by: default avatarZeng Heng <zengheng4@huawei.com>
Tested-by: default avatarShaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Tested-by: default avatarHanjun Guo <guohanjun@huawei.com>
Signed-off-by: default avatarBen Horgan <ben.horgan@arm.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent f5915600

include/linux/acpi.h

+12 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ 
#ifndef _LINUX_ACPI_H

#define _LINUX_ACPI_H



#include <linux/cleanup.h>

#include <linux/errno.h>

#include <linux/ioport.h>	/* for struct resource */

#include <linux/resource_ext.h>
@@ -221,6 +222,17 @@ void acpi_reserve_initial_tables (void); 
void acpi_table_init_complete (void);

int acpi_table_init (void);



static inline struct acpi_table_header *acpi_get_table_pointer(char *signature, u32 instance)

{

	struct acpi_table_header *table;

	int status = acpi_get_table(signature, instance, &table);



	if (ACPI_FAILURE(status))

		return ERR_PTR(-ENOENT);

	return table;

}

DEFINE_FREE(acpi_put_table, struct acpi_table_header *, if (!IS_ERR_OR_NULL(_T)) acpi_put_table(_T))



int acpi_table_parse(char *id, acpi_tbl_table_handler handler);

int __init_or_acpilib acpi_table_parse_entries(char *id,

		unsigned long table_size, int entry_id,