[PATCH 08/33] ACPI: Define acpi_put_table cleanup handler and acpi_get_table_ret() helper
From: Ben Horgan <ben.horgan@arm.com>
Date: 2025-11-07 12:36:10
Also in:
linux-acpi, lkml
Subsystem:
acpi, the rest · Maintainers:
"Rafael J. Wysocki", Linus Torvalds
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_ret() to simplify a commonly used pattern involving acpi_get_table(). These are first used in a subsequent commit. Signed-off-by: Ben Horgan <ben.horgan@arm.com> --- include/linux/acpi.h | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index a9dbacabdf89..1124b7dc79fd 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_ret(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,
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2.43.0