On 01/19/2011 09:54 AM, Uwe Kleine-König wrote: > On Tue, Jan 18, 2011 at 09:37:15PM -0800, Greg KH wrote: >> On Tue, Jan 18, 2011 at 04:39:11PM +0100, Uwe Kleine-König wrote: >>> Signed-off-by: Uwe Kleine-König <[email protected]> >>> --- >>> drivers/staging/hv/osd.h | 5 ++--- >>> 1 files changed, 2 insertions(+), 3 deletions(-) >>> >>> diff --git a/drivers/staging/hv/osd.h b/drivers/staging/hv/osd.h >>> index ce064e8..61ae54c 100644 >>> --- a/drivers/staging/hv/osd.h >>> +++ b/drivers/staging/hv/osd.h >>> @@ -28,10 +28,9 @@ >>> #include <linux/workqueue.h> >>> >>> /* Defines */ >>> -#define ALIGN_UP(value, align) (((value) & (align-1)) ? >>> \ >>> - (((value) + (align-1)) & ~(align-1)) : \ >>> - (value)) >>> +#define ALIGN_UP(value, align) ALIGN((value), (align)) >> >> How about dropping ALIGN_UP entirely and just using the built-in ALIGN() >> macro instead? > Can do. > >>> #define ALIGN_DOWN(value, align) ((value) & ~(align-1)) >> >> Any chance to get rid of this as well with the ALIGN() macro, or is that >> really not possible? > it would be > > #define ALIGN_DOWN(value, align) ALIGN((value) - (align) + 1, (align)) > > I think, but as it's only used once it might be easier to just use ALIGN > there, too. > > BTW, it's used as follows: > > #define NUM_PAGES_SPANNED(addr, len) ((ALIGN(addr+len, PAGE_SIZE) - \ > ALIGN_DOWN(addr, PAGE_SIZE)) > >> \ > PAGE_SHIFT)
(DIV_ROUND_UP(addr+len, PAGE_SIZE) - ((addr) >> PAGE_SHIFT))) or maybe better (PAGE_ALIGN(addr+len) >> PAGE_SHIFT - ((addr) >> PAGE_SHIFT)) > I wonder if there is already a function yielding this value? > Wouldn't > > ((addr + len) >> PAGE_SHIFT) - (addr >> PAGE_SHIFT) + 1 No, this won't work (it's not equivalent). regards, -- js _______________________________________________ devel mailing list [email protected] http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
