lkml.org 
[lkml]   [2006]   [Jul]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH] fdset's leakage
Date
On Tuesday 11 July 2006 18:13, Vadim Lobanov wrote:
> > unsinged long round_up_pow_of_two(unsigned long x)
> > {
> > unsigned long res = 1 << BITS_PER_LONG;
>
> You'll get a zero here. Should be 1 << (BITS_PER_LONG - 1).
>

Nope. It wont work on 64 bits platform :)

You want 1UL << (BITS_PER_LONG - 1).

But the roundup_pow_of_two() function is already defined in
include/linux/kernel.h and uses fls_long()

Eric
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-07-11 19:29    [from the cache]
©2003-2011 Jasper Spaans