From: Jiri Slaby <jirislaby@gmail.com>
To: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: akpm@linux-foundation.org, andi@firstfloor.org,
rpjday@crashcourse.ca, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] VIDEO: console, use DIV_ROUND_UP
Date: Mon, 17 Aug 2009 10:00:51 +0200 [thread overview]
Message-ID: <4A890E33.2080302@gmail.com> (raw)
In-Reply-To: <20090817080023.GB2967@localdomain.by>
On 08/17/2009 10:00 AM, Sergey Senozhatsky wrote:
> So... In general, ((vc->vc_font.width + 7) >> 3) == DIV_ROUND_UP(vc->vc_font.width, 8) - 1;
?
#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
DIV_ROUND_UP(vc->vc_font.width, 8) expands to:
(((vc->vc_font.width) + (8) - 1) / (8))
which is pretty printed:
(vc->vc_font.width + 7) / 8
and that's equivalent to:
(vc->vc_font.width + 7) >> 3
Correct?
> Are you sure we really can use DIV_ROUND_UP?
Yeah, pretty sure.
next prev parent reply other threads:[~2009-08-17 8:00 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-15 13:43 [PATCH] Make shr to divide by power of 2 (resend) Sergey Senozhatsky
2009-08-15 13:48 ` Jiri Slaby
2009-08-15 13:49 ` Robert P. J. Day
2009-08-15 14:12 ` Sergey Senozhatsky
2009-08-15 20:42 ` Jiri Slaby
2009-08-16 9:14 ` Sergey Senozhatsky
2009-08-17 7:15 ` Jiri Slaby
2009-08-17 7:31 ` Sergey Senozhatsky
2009-08-17 7:48 ` [PATCH 1/1] VIDEO: console, use DIV_ROUND_UP Jiri Slaby
2009-08-17 8:00 ` Sergey Senozhatsky
2009-08-17 8:00 ` Jiri Slaby [this message]
2009-08-17 8:08 ` Sergey Senozhatsky
2009-08-17 8:11 ` Jiri Slaby
2009-08-15 14:26 ` [PATCH] Make shr to divide by power of 2 (resend) Sergey Senozhatsky
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