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SubjectRe: [PATCH] dmaengine: iop-adma: make array 'handler' static const, makes object smaller
On 05-09-19, 17:37, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> Don't populate the array 'handler' on the stack but instead make it
> static const. Makes the object code smaller by 80 bytes.
>
> Before:
> text data bss dec hex filename
> 38225 9084 64 47373 b90d drivers/dma/iop-adma.o
>
> After:
> text data bss dec hex filename
> 38081 9148 64 47293 b8bd drivers/dma/iop-adma.o
>
> (gcc version 9.2.1, amd64)
>
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
> drivers/dma/iop-adma.c | 8 +++++---
> 1 file changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c
> index a3f942a6a946..4dc5478fc156 100644
> --- a/drivers/dma/iop-adma.c
> +++ b/drivers/dma/iop-adma.c
> @@ -1359,9 +1359,11 @@ static int iop_adma_probe(struct platform_device *pdev)
> iop_adma_device_clear_err_status(iop_chan);
>
> for (i = 0; i < 3; i++) {
> - irq_handler_t handler[] = { iop_adma_eot_handler,
> - iop_adma_eoc_handler,
> - iop_adma_err_handler };
> + static const irq_handler_t handler[] = {
> + iop_adma_eot_handler,
> + iop_adma_eoc_handler,
> + iop_adma_err_handler

would it not be more apt to declare the handler outside the loop!

> + };
> int irq = platform_get_irq(pdev, i);
> if (irq < 0) {
> ret = -ENXIO;
> --
> 2.20.1

--
~Vinod

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