From: Yury Norov
Date: Wed, 24 Feb 2021 07:44:16 -0800
> On Wed, Feb 24, 2021 at 11:52:55AM +, Alexander Lobakin wrote:
> > From: Yury Norov
> > Date: Sat, 5 Dec 2020 08:54:06 -0800
> >
> > Hi,
> >
> > > ARM64 doesn't implement find_first_{zero}_bit in arch code and doesn't
> > > enable it i
On Wed, Feb 24, 2021 at 11:52:55AM +, Alexander Lobakin wrote:
> From: Yury Norov
> Date: Sat, 5 Dec 2020 08:54:06 -0800
>
> Hi,
>
> > ARM64 doesn't implement find_first_{zero}_bit in arch code and doesn't
> > enable it in config. It leads to using find_next_bit() which is less
> > efficient
From: Yury Norov
Date: Sat, 5 Dec 2020 08:54:06 -0800
Hi,
> ARM64 doesn't implement find_first_{zero}_bit in arch code and doesn't
> enable it in config. It leads to using find_next_bit() which is less
> efficient:
>
> :
>0: aa0003e4mov x4, x0
>4: aa0103e0
On Tue, Feb 23, 2021 at 09:27:44PM -0800, Yury Norov wrote:
> On Tue, Dec 08, 2020 at 10:35:50AM +, Will Deacon wrote:
> > On Mon, Dec 07, 2020 at 05:59:16PM -0800, Yury Norov wrote:
> > > (CC: Alexey Klimov)
> > >
> > > On Mon, Dec 7, 2020 at 3:25 AM Will Deacon wrote:
> > > >
> > > > On Sat
On Tue, Dec 08, 2020 at 10:35:50AM +, Will Deacon wrote:
> On Mon, Dec 07, 2020 at 05:59:16PM -0800, Yury Norov wrote:
> > (CC: Alexey Klimov)
> >
> > On Mon, Dec 7, 2020 at 3:25 AM Will Deacon wrote:
> > >
> > > On Sat, Dec 05, 2020 at 08:54:06AM -0800, Yury Norov wrote:
> > > > ARM64 doesn'
On Mon, Dec 07, 2020 at 05:59:16PM -0800, Yury Norov wrote:
> (CC: Alexey Klimov)
>
> On Mon, Dec 7, 2020 at 3:25 AM Will Deacon wrote:
> >
> > On Sat, Dec 05, 2020 at 08:54:06AM -0800, Yury Norov wrote:
> > > ARM64 doesn't implement find_first_{zero}_bit in arch code and doesn't
> > > enable it
(CC: Alexey Klimov)
On Mon, Dec 7, 2020 at 3:25 AM Will Deacon wrote:
>
> On Sat, Dec 05, 2020 at 08:54:06AM -0800, Yury Norov wrote:
> > ARM64 doesn't implement find_first_{zero}_bit in arch code and doesn't
> > enable it in config. It leads to using find_next_bit() which is less
> > efficient:
On Sat, Dec 05, 2020 at 08:54:06AM -0800, Yury Norov wrote:
> ARM64 doesn't implement find_first_{zero}_bit in arch code and doesn't
> enable it in config. It leads to using find_next_bit() which is less
> efficient:
[...]
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 1515f6f153a
ARM64 doesn't implement find_first_{zero}_bit in arch code and doesn't
enable it in config. It leads to using find_next_bit() which is less
efficient:
:
0: aa0003e4mov x4, x0
4: aa0103e0mov x0, x1
8: b4000181cbz x1, 38
c: f9
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