On Mon, Apr 03, 2023 at 09:49:13AM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> The gxp_i2c_slave_irq_handler() is hidden in an #ifdef, but the
> caller uses an IS_ENABLED() check:
> 
> drivers/i2c/busses/i2c-gxp.c: In function 'gxp_i2c_irq_handler':
> drivers/i2c/busses/i2c-gxp.c:467:29: error: implicit declaration of function 'gxp_i2c_slave_irq_handler'; did you mean 'gxp_i2c_irq_handler'? [-Werror=implicit-function-declaration]
> 
> It has to consistently use one method or the other to avoid warnings,
> so move to IS_ENABLED() here for readability and build coverage, and
> move the #ifdef in linux/i2c.h to allow building it as dead code.
> 
> Fixes: 4a55ed6f89f5 ("i2c: Add GXP SoC I2C Controller")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Applied to for-current, thanks!