Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752243AbbKVTRV (ORCPT ); Sun, 22 Nov 2015 14:17:21 -0500 Received: from mail-yk0-f176.google.com ([209.85.160.176]:35179 "EHLO mail-yk0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751736AbbKVTRQ (ORCPT ); Sun, 22 Nov 2015 14:17:16 -0500 MIME-Version: 1.0 In-Reply-To: <1447900314-5727-2-git-send-email-hejianet@gmail.com> References: <1447900314-5727-1-git-send-email-hejianet@gmail.com> <1447900314-5727-2-git-send-email-hejianet@gmail.com> Date: Sun, 22 Nov 2015 21:17:16 +0200 Message-ID: Subject: Re: [PATCH 1/3] linux/bitmap: Move 2 mask macro to bitops.h From: Andy Shevchenko To: Jia He Cc: "linux-kernel@vger.kernel.org" , Linux-Arch , Andrew Morton , Rasmus Villemoes , Denys Vlasenko , Kyungmin Park , Michal Nazarewicz , Yury Norov , Tejun Heo , Martin Kepplinger , George Spelvin , Ingo Molnar , Arnd Bergmann Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2267 Lines: 61 On Thu, Nov 19, 2015 at 4:31 AM, Jia He wrote: > This patch moves the mask macro to bitops.h and then the new introduced > api in find_bit.c can use it. Why API can't use GENMASK() instead? > > Signed-off-by: Jia He > --- > include/linux/bitmap.h | 3 --- > include/linux/bitops.h | 4 ++++ > 2 files changed, 4 insertions(+), 3 deletions(-) > > diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h > index 9653fdb..15524f6 100644 > --- a/include/linux/bitmap.h > +++ b/include/linux/bitmap.h > @@ -172,9 +172,6 @@ extern unsigned int bitmap_ord_to_pos(const unsigned long *bitmap, unsigned int > extern int bitmap_print_to_pagebuf(bool list, char *buf, > const unsigned long *maskp, int nmaskbits); > > -#define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - 1))) > -#define BITMAP_LAST_WORD_MASK(nbits) (~0UL >> (-(nbits) & (BITS_PER_LONG - 1))) > - > #define small_const_nbits(nbits) \ > (__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG) > > diff --git a/include/linux/bitops.h b/include/linux/bitops.h > index 2b8ed12..b881028 100644 > --- a/include/linux/bitops.h > +++ b/include/linux/bitops.h > @@ -24,6 +24,10 @@ > #define GENMASK_ULL(h, l) \ > (((~0ULL) << (l)) & (~0ULL >> (BITS_PER_LONG_LONG - 1 - (h)))) > > +/* For bitmap ops*/ > +#define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - 1))) > +#define BITMAP_LAST_WORD_MASK(nbits) (~0UL >> (-(nbits) & (BITS_PER_LONG - 1))) > + > extern unsigned int __sw_hweight8(unsigned int w); > extern unsigned int __sw_hweight16(unsigned int w); > extern unsigned int __sw_hweight32(unsigned int w); > -- > 2.5.0 > > -- > 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/ -- With Best Regards, Andy Shevchenko -- 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/