LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Richard Knutsson <ricknu-0@student.ltu.se>
To: Andreas Schwab <schwab@suse.de>
Cc: Vignesh Babu BM <vignesh.babu@wipro.com>,
	Kernel Janitors List <kernel-janitors@lists.osdl.org>,
	linux-mm@kvack.org, tony.luck@intel.com,
	linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [KJ] [PATCH] is_power_of_2 in ia64mm
Date: Fri, 16 Feb 2007 16:57:51 +0100	[thread overview]
Message-ID: <45D5D47F.3000303@student.ltu.se> (raw)
In-Reply-To: <jeire2nnik.fsf@sykes.suse.de>

Andreas Schwab wrote:
> Richard Knutsson <ricknu-0@student.ltu.se> writes:
>
>   
>> Vignesh Babu BM wrote:
>>     
>>> @@ -175,7 +176,7 @@ static int __init hugetlb_setup_sz(char *str)
>>>  		tr_pages = 0x15557000UL;
>>>   	size = memparse(str, &str);
>>> -	if (*str || (size & (size-1)) || !(tr_pages & size) ||
>>> +	if (*str || !is_power_of_2(size) || !(tr_pages & size) ||
>>>  		size <= PAGE_SIZE ||
>>>  		size >= (1UL << PAGE_SHIFT << MAX_ORDER)) {
>>>  		printk(KERN_WARNING "Invalid huge page size specified\n");
>>>
>>>   
>>>       
>> As we talked about before; is this really correct? !is_power_of_2(0) ==
>> true while (0 & (0-1)) == 0.
>>     
>
> size == 0 is also covered by the next two conditions, so the overall value
> does not change.
>   
Yes, but is it meant to state that 'size' is not a power of two? 
Otherwise, imho, it should be left as-is.

Richard Knutsson


  reply	other threads:[~2007-02-16 15:58 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-16 12:03 [KJ][PATCH] " Vignesh Babu BM
2007-02-16 15:02 ` [KJ] [PATCH] " Richard Knutsson
2007-02-16 15:13   ` Andreas Schwab
2007-02-16 15:57     ` Richard Knutsson [this message]
2007-02-16 15:59       ` Andreas Schwab
2007-02-16 16:40         ` Richard Knutsson
2007-02-16 16:43           ` Andreas Schwab
2007-02-16 17:06           ` Robert P. J. Day
2007-02-16 17:36             ` Richard Knutsson
2007-02-16 16:58       ` Robert P. J. Day
2007-02-16 15:27   ` Boot time Bluetooth BUG: warning: (value > m) at hid-core.c:793 Fortier,Vincent [Montreal]
2007-02-18 21:23     ` Jiri Kosina
2007-02-19  0:25       ` Marcel Holtmann
2007-02-19  9:36         ` Jiri Kosina
2007-02-27 15:54         ` Jiri Kosina
2007-02-27 16:12           ` Fortier,Vincent [Montreal]
     [not found]             ` <Pine.LNX.4.64.0702271713220.10496@twin.jikos.cz>
2007-02-27 20:35               ` Fortier,Vincent [Montreal]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=45D5D47F.3000303@student.ltu.se \
    --to=ricknu-0@student.ltu.se \
    --cc=kernel-janitors@lists.osdl.org \
    --cc=linux-ia64@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=schwab@suse.de \
    --cc=tony.luck@intel.com \
    --cc=vignesh.babu@wipro.com \
    --subject='Re: [KJ] [PATCH] is_power_of_2 in ia64mm' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).