From: Qian Cai <quic_qiancai@quicinc.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Yury Norov <yury.norov@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] bitmap: simplify GENMASK(size - 1, 0) lines
Date: Tue, 26 Oct 2021 15:33:48 -0400 [thread overview]
Message-ID: <397751ea-536b-af3c-752d-c4b1045e6e56@quicinc.com> (raw)
In-Reply-To: <YXhVVvG9keoVWJyK@smile.fi.intel.com>
On 10/26/21 3:21 PM, Andy Shevchenko wrote:
> Can you explain to me how it is supposed to work?
>
> For example,
>
> x = 0xaa55;
> size = 5;
>
> printf("%lu\n", find_first_bit(&x, size));
>
> In the resulting code we will always have 5 as the result,
> but is it correct one?
Sorry, my bad. GENMASK(size - 1, 0) would just become __GENMASK(size -
1, 0) instead of 0. Let me revisit it and run some tests first.
next prev parent reply other threads:[~2021-10-26 19:33 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-26 14:41 [PATCH] bitmap: simplify GENMASK(size - 1, 0) lines Qian Cai
2021-10-26 15:10 ` Andy Shevchenko
2021-10-26 15:26 ` Qian Cai
2021-10-26 18:54 ` Yury Norov
2021-10-26 19:21 ` Andy Shevchenko
2021-10-26 19:28 ` Yury Norov
2021-10-26 19:42 ` Andy Shevchenko
2021-10-26 19:54 ` Qian Cai
2021-10-27 9:44 ` Andy Shevchenko
2021-10-27 15:06 ` Qian Cai
2021-10-26 19:33 ` Qian Cai [this message]
2021-10-27 9:34 ` Andy Shevchenko
2021-10-29 1:36 ` [bitmap] ca95e676a1: BUG:unable_to_handle_page_fault_for_address kernel test robot
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