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Laura Abbott
3027743f83
The new challenge is to remove VLAs from the kernel (see https://lkml.org/lkml/2018/3/7/621) to eventually turn on -Wvla. Using a kmalloc array is the easy way to fix this but kmalloc is still more expensive than stack allocation. Introduce a fast path with a fixed size stack array to cover most chip with gpios below some fixed amount. The slow path dynamically allocates an array to cover those chips with a large number of gpios. Reviewed-by: Geert Uytterhoeven <[email protected]> Reviewed-by: Phil Reid <[email protected]> Reviewed-and-tested-by: Lukas Wunner <[email protected]> Signed-off-by: Lukas Wunner <[email protected]> Signed-off-by: Laura Abbott <[email protected]> Reviewed-by: Andy Shevchenko <[email protected]> Signed-off-by: Linus Walleij <[email protected]>