Am 20.10.20 um 17:29 schrieb David Laight:
From: Colin KingSent: 20 October 2020 15:47 From: Colin Ian King <colin.king@xxxxxxxxxxxxx> Don't populate the const array dev_names on the stack but instead it static. Makes the object code smaller by 15 bytes. Before: text data bss dec hex filename 17091 2648 64 19803 4d5b media/rkisp1/rkisp1-resizer.o After: text data bss dec hex filename 17012 2712 64 19788 4d4c media/rkisp1/rkisp1-resizer.o (gcc version 10.2.0) Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx> --- drivers/staging/media/rkisp1/rkisp1-resizer.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/staging/media/rkisp1/rkisp1-resizer.c b/drivers/staging/media/rkisp1/rkisp1- resizer.c index 1687d82e6c68..7ca5b47c5bf5 100644 --- a/drivers/staging/media/rkisp1/rkisp1-resizer.c +++ b/drivers/staging/media/rkisp1/rkisp1-resizer.c @@ -763,8 +763,10 @@ static void rkisp1_rsz_unregister(struct rkisp1_resizer *rsz) static int rkisp1_rsz_register(struct rkisp1_resizer *rsz) { - const char * const dev_names[] = {RKISP1_RSZ_MP_DEV_NAME, - RKISP1_RSZ_SP_DEV_NAME}; + static const char * const dev_names[] = { + RKISP1_RSZ_MP_DEV_NAME, + RKISP1_RSZ_SP_DEV_NAME + }; struct media_pad *pads = rsz->pads; struct v4l2_subdev *sd = &rsz->sd; int ret;Don't look at what that code is actually doing.... It is rather horrid. rkisp1_rsz_register() is called for each entry in an array (twice). The array index is written into rsz->id. The value is then used to select one of the two strings. But rsz->id is actually an enum type.
Hi, Is it that bad to use enum as an array index? we use it in many places in the driver. Thanks, Dafna
rkisp1_rsz_register() should probably just be called twice with some extra parameters. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
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