linux-kernel - Re: [patch -mm 1/1] remove useless tolower in isofs

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Date:	Sun, 27 May 2007 22:53:26 -0400 (EDT)
From:	"John Anthony Kazos Jr." <jakj@...-k-j.com>
To:	young dave <hidave.darkstar@...il.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [patch -mm 1/1] remove useless tolower in isofs

> Hi,
> Remove useless tolower in isofs
> 
> Signed-off-by: dave young <hidave.darkstar@...il.com>
> 
> inode.c |    2 +-
> 1 file changed, 1 insertions(+), 1 deletions(-)
> 
> diff -dur linux/fs/isofs/inode.c linux.new/fs/isofs/inode.c
> --- linux/fs/isofs/inode.c      2007-05-28 08:54:33.000000000 +0000
> +++ linux.new/fs/isofs/inode.c  2007-05-28 08:55:02.000000000 +0000
> @@ -197,7 +197,7 @@
>        hash = init_name_hash();
>        while (len--) {
>                c = tolower(*name++);
> -               hash = partial_name_hash(tolower(c), hash);
> +               hash = partial_name_hash(c, hash);
>        }
>        qstr->hash = end_name_hash(hash);

How about this? A lot more readable and doesn't even need an intermediate 
value.

for (; len; len--, name++) {
	hash = partial_name_hash(tolower(*name), hash);
}

Or if you don't think that way is more readable, how about this?

while (len) {
	hash = partial_name_hash(tolower(*name), hash);
	name++;
	len--;
}

And then there's the supercompact form.

while (len--) {
	hash = partial_name_hash(tolower(*name++), hash);
}

But I do not like the last one at all. The first one is the best, because 
it clearly separates the condition and iteration parts of the expression, 
while STILL being only three lines long. Or two, if you omit the braces. 
(But you shouldn't.)
-
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