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Re: [PATCH 3/7] xen/bitops: Implement ffsl() in common logic
- To: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Wed, 13 Mar 2024 17:48:02 +0000
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- Cc: Jan Beulich <JBeulich@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>, Shawn Anastasio <sanastasio@xxxxxxxxxxxxxxxxxxxxx>, "consulting @ bugseng . com" <consulting@xxxxxxxxxxx>, Simone Ballarin <simone.ballarin@xxxxxxxxxxx>, Federico Serafini <federico.serafini@xxxxxxxxxxx>, Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
- Delivery-date: Wed, 13 Mar 2024 17:48:13 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 13/03/2024 5:27 pm, Andrew Cooper wrote:
> xen/arch/arm/include/asm/bitops.h | 2 +-
> xen/arch/ppc/include/asm/bitops.h | 1 -
> xen/arch/x86/include/asm/bitops.h | 30 +++++++++++++-----------------
> xen/common/bitops.c | 7 +++++++
> xen/include/xen/bitops.h | 12 ++++++++++++
> 5 files changed, 33 insertions(+), 19 deletions(-)
>
> diff --git a/xen/arch/arm/include/asm/bitops.h
> b/xen/arch/arm/include/asm/bitops.h
> index 09c6064274a7..59ae8ed150b6 100644
> --- a/xen/arch/arm/include/asm/bitops.h
> +++ b/xen/arch/arm/include/asm/bitops.h
> @@ -158,7 +158,7 @@ static inline int fls(unsigned int x)
>
>
> #define arch_ffs(x) ({ unsigned int __t = (x); fls(ISOLATE_LSB(__t)); })
> -#define ffsl(x) ({ unsigned long __t = (x); flsl(ISOLATE_LSB(__t)); })
> +#define arch_ffsl(x) ({ unsigned long __t = (x); flsl(ISOLATE_LSB(__t)); })
>
> /**
> * find_first_set_bit - find the first set bit in @word
It turns out this change isn't bisectable on ARM, but it is by the end
of the series.
Reordering patches 6+7 to be ahead of this one resolves the bisection
problem.
~Andrew
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