* [PATCH v2 0/3] bitops: __fls adjustments
@ 2022-05-27 11:53 Amadeusz Sławiński
2022-05-27 11:53 ` [PATCH v2 1/3] ARC: bitops: Change __fls to return unsigned long Amadeusz Sławiński
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Amadeusz Sławiński @ 2022-05-27 11:53 UTC (permalink / raw)
To: Vineet Gupta, Geert Uytterhoeven, David S . Miller
Cc: Guenter Roeck, linux-snps-arc, linux-m68k, sparclinux,
linux-kernel, Amadeusz Sławiński
Apparently on few architectures __fls is defined incorrectly. Fix this
by adjusting declarations to asm-generic ones.
As far as I can tell there should be no functional changes, but I don't
have devices to test it, so it was only compile tested.
Changes in v2:
- change both declarations in ARC header (pointed by Guenter Roeck)
- also change sparc64 declaration (pointed by Guenter Roeck)
Amadeusz Sławiński (3):
ARC: bitops: Change __fls to return unsigned long
m68k: bitops: Change __fls to return and accept unsigned long
sparc64: bitops: Change __fls to return unsigned long
arch/arc/include/asm/bitops.h | 4 ++--
arch/m68k/include/asm/bitops.h | 2 +-
arch/sparc/include/asm/bitops_64.h | 2 +-
3 files changed, 4 insertions(+), 4 deletions(-)
--
2.25.1
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^ permalink raw reply [flat|nested] 6+ messages in thread* [PATCH v2 1/3] ARC: bitops: Change __fls to return unsigned long
2022-05-27 11:53 [PATCH v2 0/3] bitops: __fls adjustments Amadeusz Sławiński
@ 2022-05-27 11:53 ` Amadeusz Sławiński
2022-05-27 11:53 ` [PATCH v2 2/3] m68k: bitops: Change __fls to return and accept " Amadeusz Sławiński
2022-05-27 11:53 ` [PATCH v2 3/3] sparc64: bitops: Change __fls to return " Amadeusz Sławiński
2 siblings, 0 replies; 6+ messages in thread
From: Amadeusz Sławiński @ 2022-05-27 11:53 UTC (permalink / raw)
To: Vineet Gupta, Geert Uytterhoeven, David S . Miller
Cc: Guenter Roeck, linux-snps-arc, linux-m68k, sparclinux,
linux-kernel, Amadeusz Sławiński, Cezary Rojewski
As per asm-generic definition and other architectures __fls should
return unsigned long.
No functional change is expected as return value should fit in unsigned
long.
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
---
arch/arc/include/asm/bitops.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arc/include/asm/bitops.h b/arch/arc/include/asm/bitops.h
index bdb7e190a294..f5a936496f06 100644
--- a/arch/arc/include/asm/bitops.h
+++ b/arch/arc/include/asm/bitops.h
@@ -82,7 +82,7 @@ static inline __attribute__ ((const)) int fls(unsigned int x)
/*
* __fls: Similar to fls, but zero based (0-31)
*/
-static inline __attribute__ ((const)) int __fls(unsigned long x)
+static inline __attribute__ ((const)) unsigned long __fls(unsigned long x)
{
if (!x)
return 0;
@@ -131,7 +131,7 @@ static inline __attribute__ ((const)) int fls(unsigned int x)
/*
* __fls: Similar to fls, but zero based (0-31). Also 0 if no bit set
*/
-static inline __attribute__ ((const)) int __fls(unsigned long x)
+static inline __attribute__ ((const)) unsigned long __fls(unsigned long x)
{
/* FLS insn has exactly same semantics as the API */
return __builtin_arc_fls(x);
--
2.25.1
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^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH v2 2/3] m68k: bitops: Change __fls to return and accept unsigned long
2022-05-27 11:53 [PATCH v2 0/3] bitops: __fls adjustments Amadeusz Sławiński
2022-05-27 11:53 ` [PATCH v2 1/3] ARC: bitops: Change __fls to return unsigned long Amadeusz Sławiński
@ 2022-05-27 11:53 ` Amadeusz Sławiński
2022-07-06 9:30 ` Geert Uytterhoeven
2022-05-27 11:53 ` [PATCH v2 3/3] sparc64: bitops: Change __fls to return " Amadeusz Sławiński
2 siblings, 1 reply; 6+ messages in thread
From: Amadeusz Sławiński @ 2022-05-27 11:53 UTC (permalink / raw)
To: Vineet Gupta, Geert Uytterhoeven, David S . Miller
Cc: Guenter Roeck, linux-snps-arc, linux-m68k, sparclinux,
linux-kernel, Amadeusz Sławiński, Cezary Rojewski
As per asm-generic definition and other architectures __fls should
return and accept unsigned long as its parameter.
No functional change is expected as return value should fit in unsigned
long.
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
---
arch/m68k/include/asm/bitops.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/m68k/include/asm/bitops.h b/arch/m68k/include/asm/bitops.h
index 51283db53667..87c2cd66a9ce 100644
--- a/arch/m68k/include/asm/bitops.h
+++ b/arch/m68k/include/asm/bitops.h
@@ -510,7 +510,7 @@ static inline int fls(unsigned int x)
return 32 - cnt;
}
-static inline int __fls(int x)
+static inline unsigned long __fls(unsigned long x)
{
return fls(x) - 1;
}
--
2.25.1
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^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH v2 2/3] m68k: bitops: Change __fls to return and accept unsigned long
2022-05-27 11:53 ` [PATCH v2 2/3] m68k: bitops: Change __fls to return and accept " Amadeusz Sławiński
@ 2022-07-06 9:30 ` Geert Uytterhoeven
0 siblings, 0 replies; 6+ messages in thread
From: Geert Uytterhoeven @ 2022-07-06 9:30 UTC (permalink / raw)
To: Amadeusz Sławiński
Cc: Vineet Gupta, David S . Miller, Guenter Roeck, arcml, linux-m68k,
sparclinux, Linux Kernel Mailing List, Cezary Rojewski
On Fri, May 27, 2022 at 1:53 PM Amadeusz Sławiński
<amadeuszx.slawinski@linux.intel.com> wrote:
> As per asm-generic definition and other architectures __fls should
> return and accept unsigned long as its parameter.
>
> No functional change is expected as return value should fit in unsigned
> long.
>
> Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
> Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
i.e. will queue in the m68k for-v5.20 branch.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH v2 3/3] sparc64: bitops: Change __fls to return unsigned long
2022-05-27 11:53 [PATCH v2 0/3] bitops: __fls adjustments Amadeusz Sławiński
2022-05-27 11:53 ` [PATCH v2 1/3] ARC: bitops: Change __fls to return unsigned long Amadeusz Sławiński
2022-05-27 11:53 ` [PATCH v2 2/3] m68k: bitops: Change __fls to return and accept " Amadeusz Sławiński
@ 2022-05-27 11:53 ` Amadeusz Sławiński
2022-08-03 8:48 ` Amadeusz Sławiński
2 siblings, 1 reply; 6+ messages in thread
From: Amadeusz Sławiński @ 2022-05-27 11:53 UTC (permalink / raw)
To: Vineet Gupta, Geert Uytterhoeven, David S . Miller
Cc: Guenter Roeck, linux-snps-arc, linux-m68k, sparclinux,
linux-kernel, Amadeusz Sławiński, Cezary Rojewski
As per asm-generic definition and other architectures __fls should
return unsigned long.
No functional change is expected as return value should fit in unsigned
long.
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
---
arch/sparc/include/asm/bitops_64.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/sparc/include/asm/bitops_64.h b/arch/sparc/include/asm/bitops_64.h
index 005a8ae858f1..cdac39bd7b32 100644
--- a/arch/sparc/include/asm/bitops_64.h
+++ b/arch/sparc/include/asm/bitops_64.h
@@ -24,7 +24,7 @@ void clear_bit(unsigned long nr, volatile unsigned long *addr);
void change_bit(unsigned long nr, volatile unsigned long *addr);
int fls(unsigned int word);
-int __fls(unsigned long word);
+unsigned long __fls(unsigned long word);
#include <asm-generic/bitops/non-atomic.h>
--
2.25.1
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^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH v2 3/3] sparc64: bitops: Change __fls to return unsigned long
2022-05-27 11:53 ` [PATCH v2 3/3] sparc64: bitops: Change __fls to return " Amadeusz Sławiński
@ 2022-08-03 8:48 ` Amadeusz Sławiński
0 siblings, 0 replies; 6+ messages in thread
From: Amadeusz Sławiński @ 2022-08-03 8:48 UTC (permalink / raw)
To: Vineet Gupta, Geert Uytterhoeven, David S . Miller
Cc: Guenter Roeck, linux-snps-arc, linux-m68k, sparclinux,
linux-kernel, Cezary Rojewski
On 5/27/2022 1:53 PM, Amadeusz Sławiński wrote:
> As per asm-generic definition and other architectures __fls should
> return unsigned long.
>
> No functional change is expected as return value should fit in unsigned
> long.
>
> Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
> Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
> ---
> arch/sparc/include/asm/bitops_64.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/sparc/include/asm/bitops_64.h b/arch/sparc/include/asm/bitops_64.h
> index 005a8ae858f1..cdac39bd7b32 100644
> --- a/arch/sparc/include/asm/bitops_64.h
> +++ b/arch/sparc/include/asm/bitops_64.h
> @@ -24,7 +24,7 @@ void clear_bit(unsigned long nr, volatile unsigned long *addr);
> void change_bit(unsigned long nr, volatile unsigned long *addr);
>
> int fls(unsigned int word);
> -int __fls(unsigned long word);
> +unsigned long __fls(unsigned long word);
>
> #include <asm-generic/bitops/non-atomic.h>
>
Hi,
any chance this one could also get merged? Other two patches are already
in linux-next and I would like to remove it from list of things I have
to remember ;)
Amadeusz
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^ permalink raw reply [flat|nested] 6+ messages in thread
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2022-05-27 11:53 [PATCH v2 0/3] bitops: __fls adjustments Amadeusz Sławiński
2022-05-27 11:53 ` [PATCH v2 1/3] ARC: bitops: Change __fls to return unsigned long Amadeusz Sławiński
2022-05-27 11:53 ` [PATCH v2 2/3] m68k: bitops: Change __fls to return and accept " Amadeusz Sławiński
2022-07-06 9:30 ` Geert Uytterhoeven
2022-05-27 11:53 ` [PATCH v2 3/3] sparc64: bitops: Change __fls to return " Amadeusz Sławiński
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