From: Pekka Enberg <penberg@cs.helsinki.fi>
To: "Machida, Hiroyuki" <machida@sm.sony.co.jp>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH][FAT] FAT dirent scan with hin take #3
Date: Wed, 31 Aug 2005 13:03:39 +0300 [thread overview]
Message-ID: <84144f0205083103031a858c15@mail.gmail.com> (raw)
In-Reply-To: <43156963.8020203@sm.sony.co.jp>
On 8/31/05, Machida, Hiroyuki <machida@sm.sony.co.jp> wrote:
> +inline
> +static int hint_index_body(const unsigned char *name, int name_len, int check_null)
> +{
> + int i;
> + int val = 0;
> + unsigned char *p = (unsigned char *) name;
> + int id = current->pid;
> +
> + for (i=0; i<name_len; i++) {
> + if (check_null && !*p) break;
> + val = ((val << 1) & 0xfe) | ((val & 0x80) ? 1 : 0);
> + val ^= *p;
> + p ++;
> + }
> + id = ((id >> 8) & 0xf) ^ (id & 0xf);
> + val = (val << 1) | (id & 1);
> + return val & (FAT_SCAN_NWAY-1);
Couldn't you use jhash() from <linux/jhash.h> here?
Pekka
next prev parent reply other threads:[~2005-08-31 10:03 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-30 3:01 [RFC][FAT] diren scan profiling report Machida, Hiroyuki
2005-08-30 4:50 ` [PATCH][FAT] FAT dirent scan with hin take #2 Machida, Hiroyuki
2005-08-30 8:51 ` Pekka Enberg
2005-08-30 8:55 ` Pekka Enberg
2005-08-30 9:18 ` Vojtech Pavlik
2005-08-30 19:27 ` OGAWA Hirofumi
2005-08-31 1:43 ` OGAWA Hirofumi
2005-08-31 8:25 ` [PATCH][FAT] FAT dirent scan with hin take #3 Machida, Hiroyuki
2005-08-31 10:00 ` Pekka Enberg
2005-08-31 12:57 ` Machida, Hiroyuki
2005-08-31 13:51 ` Pekka Enberg
2005-08-31 13:53 ` Pekka Enberg
2005-08-31 10:03 ` Pekka Enberg [this message]
2005-08-31 13:27 ` Machida, Hiroyuki
2005-08-31 10:14 ` Pekka Enberg
2005-08-31 13:04 ` Machida, Hiroyuki
2005-08-31 13:52 ` Pekka Enberg
2005-08-31 16:41 ` OGAWA Hirofumi
2005-09-01 5:50 ` Machida, Hiroyuki
2005-09-01 7:45 ` Machida, Hiroyuki
2005-09-01 17:48 ` OGAWA Hirofumi
2005-09-14 18:59 ` Machida, Hiroyuki
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