Re: [PATCH][FAT] FAT dirent scan with hin take #3

["Machida, Hiroyuki" <machida@sm.sony.co.jp>]

Pekka Enberg wrote:
> 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
Thanks, I'll replace it with functions in jhash.h, then
check performance again.

-- 
Hiroyuki Machida		machida@sm.sony.co.jp