diff options
| author | Ben Horgan <ben.horgan@arm.com> | 2025-11-19 12:22:38 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2025-11-19 18:34:19 +0000 |
| commit | 96f4a4d53e6660d9b62e8d739388267fbb660e9f (patch) | |
| tree | 700e1d58a452c072ce237ba5c72e8b7bb3cb5a30 | |
| parent | f5915600cc4ca0338a37d5a8a4032e25d939156b (diff) | |
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: Gavin Shan <gshan@redhat.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Reviewed-by: Fenghua Yu <fenghuay@nvidia.com>
Tested-by: Fenghua Yu <fenghuay@nvidia.com>
Tested-by: Carl Worth <carl@os.amperecomputing.com>
Tested-by: Gavin Shan <gshan@redhat.com>
Tested-by: Zeng Heng <zengheng4@huawei.com>
Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Tested-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Ben Horgan <ben.horgan@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| -rw-r--r-- | include/linux/acpi.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/acpi.h b/include/linux/acpi.h index a9dbacabdf89..ac8797f95236 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -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, |