[Linux-ia64] Re: [PATCH] find_next_zero_bit

[Linux-ia64] Re: [PATCH] find_next_zero_bit

[David Mosberger]

Applied.

Thanks,

	--david

>>>>> On Fri, 25 Jan 2002 19:08:43 +0100 (MET), Erich Focht <efocht@ess.nec.de> said:

  Erich> Hi, the following little patch repairs the function
  Erich> find_next_zero_bit() for ia64 platforms. Somehow this small
  Erich> piece of code went lost from the ia64 version. The problem is
  Erich> that the function returns results larger than the size of the
  Erich> bitmap if all bits are set (ignores stop-bits) and the size
  Erich> is not a multiple of sizeof(long). This lead to crashes of
  Erich> Ingo's new scheduler under heavy load.

  Erich> Regards, Erich


  Erich> --- 2.4.17-ia64-kdb-j6/include/asm-ia64/bitops.h Tue Jan 15
  Erich> 15:21:08 2002 +++
  Erich> 2.4.17-ia64-kdb-j6ia64/include/asm-ia64/bitops.h Fri Jan 25
  Erich> 19:45:31 2002 @@ -357,6 +357,8 @@ tmp = *p; found_first: tmp
  Erich> |= ~0UL << size; + if (tmp = ~0UL) /* Are any bits zero? */
  Erich> + return result + size; /* Nope. */ found_middle: return
  Erich> result + ffz(tmp); }