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i2c: boardinfo: Annotate code used in init phase only 

Annotate two places in boardinfo code:
- __i2c_first_dynamic_bus_num is set in init phase. Annotate it as
  __ro_after_init to prevent later changes.
- i2c_register_board_info() is used in init phase only, so annotate it
  as __init, allowing to free the memory after init phase.
  This is safe, see comment: "done in board-specific init code near
  arch_initcall() time"

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
pull/1354/merge
Heiner Kallweit 2025-09-14 22:24:13 +02:00 committed by Wolfram Sang
parent 54d6a978bb
commit 1a2b423be6
2 changed files with 3 additions and 3 deletions
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4
drivers/i2c/i2c-boardinfo.c
View File

@ -22,7 +22,7 @@ EXPORT_SYMBOL_GPL(__i2c_board_lock);
LIST_HEAD(__i2c_board_list);
EXPORT_SYMBOL_GPL(__i2c_board_list);
int __i2c_first_dynamic_bus_num;
int __i2c_first_dynamic_bus_num __ro_after_init;
EXPORT_SYMBOL_GPL(__i2c_first_dynamic_bus_num);
@ -48,7 +48,7 @@ EXPORT_SYMBOL_GPL(__i2c_first_dynamic_bus_num);
* The board info passed can safely be __initdata, but be careful of embedded
* pointers (for platform_data, functions, etc) since that won't be copied.
*/
int i2c_register_board_info(int busnum, struct i2c_board_info const *info, unsigned len)
int __init i2c_register_board_info(int busnum, struct i2c_board_info const *info, unsigned len)
{
int status;

2
include/linux/i2c.h
View File

@ -499,7 +499,7 @@ static inline struct i2c_client *i2c_verify_client(struct device *dev)
* Modules for add-on boards must use other calls.
*/
#ifdef CONFIG_I2C_BOARDINFO
int
int __init
i2c_register_board_info(int busnum, struct i2c_board_info const *info,
unsigned n);
#else