[Outreachy kernel] [PATCH v2 2/7] staging: most: Using macro DIV_ROUND_UP

Julia Lawall julia.lawall at lip6.fr
Wed Feb 22 09:27:10 UTC 2017


> @@ -117,7 +118,7 @@ static int alloc_dbr(u16 size)
>  		return DBR_SIZE; /* out of memory */
>
>  	for (i = 0; i < DBR_MAP_SIZE; i++) {
> -		u32 const blocks = (size + DBR_BLOCK_SIZE - 1) / DBR_BLOCK_SIZE;
> +		u32 const blocks = DIV_ROUND_UP(size, DBR_BLOCK_SIZE);
>  		u32 mask = ~((~(u32)0) << blocks);

Totally unrelated to DIV_ROUND_UP, would this code be a candidate for
GENMASK?

julia

>
>  		do {
> @@ -137,7 +138,7 @@ static int alloc_dbr(u16 size)
>  static void free_dbr(int offs, int size)
>  {
>  	int block_idx = offs / DBR_BLOCK_SIZE;
> -	u32 const blocks = (size + DBR_BLOCK_SIZE - 1) / DBR_BLOCK_SIZE;
> +	u32 const blocks = DIV_ROUND_UP(size, DBR_BLOCK_SIZE);
>  	u32 mask = ~((~(u32)0) << blocks);
>
>  	mask <<= block_idx % 32;
> --
> 2.7.4
>
> --
> You received this message because you are subscribed to the Google Groups "outreachy-kernel" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to outreachy-kernel+unsubscribe at googlegroups.com.
> To post to this group, send email to outreachy-kernel at googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/outreachy-kernel/20170222091015.GA11058%40singhal-Inspiron-5558.
> For more options, visit https://groups.google.com/d/optout.
>


More information about the devel mailing list