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Date: Tue, 18 Jun 2013 11:33:50 +0800
From: Chen Gang <gang.chen@...anux.com>
To: Uwe Kleine-König
<u.kleine-koenig@...gutronix.de>,
Russell King - ARM Linux <linux@....linux.org.uk>,
Geert Uytterhoeven <geert@...ux-m68k.org>
CC: Linux-Arch <linux-arch@...r.kernel.org>,
linux-m68k <linux-m68k@...ts.linux-m68k.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3] arch/*/asm/include/bitops.h: api issue, find_*_bit()
defination are different with each other
Hello related Maintainers:
Please help check this patch when you have time.
Thanks.
On 06/06/2013 05:37 PM, Chen Gang wrote:
>
> For arm and m68k, they customize find_*_bit(), but the API is different
> with 'generic'.
>
> avr32, s390, and unicore32 also customize find_*_bit(), but the API is
> the same with 'generic', and the left architectures all use 'generic'.
>
> So need change arm and m68k related API to match the 'generic', then
> all another modules can face same public API for various architectures.
>
> Also beautify code and comments to pass "./scripts/checkpatch.pl"
>
>
> Signed-off-by: Chen Gang <gang.chen@...anux.com>
> ---
> arch/arm/include/asm/bitops.h | 26 ++++++++++++++++++--------
> arch/arm/lib/findbit.S | 14 ++++++++++----
> arch/m68k/include/asm/bitops.h | 25 ++++++++++++++-----------
> 3 files changed, 42 insertions(+), 23 deletions(-)
>
> diff --git a/arch/arm/include/asm/bitops.h b/arch/arm/include/asm/bitops.h
> index e691ec9..83e4d3a 100644
> --- a/arch/arm/include/asm/bitops.h
> +++ b/arch/arm/include/asm/bitops.h
> @@ -161,18 +161,28 @@ extern int _test_and_change_bit(int nr, volatile unsigned long * p);
> /*
> * Little endian assembly bitops. nr = 0 -> byte 0 bit 0.
> */
> -extern int _find_first_zero_bit_le(const void * p, unsigned size);
> -extern int _find_next_zero_bit_le(const void * p, int size, int offset);
> -extern int _find_first_bit_le(const unsigned long *p, unsigned size);
> -extern int _find_next_bit_le(const unsigned long *p, int size, int offset);
> +extern unsigned long _find_first_zero_bit_le(const void *p,
> + unsigned long size);
> +extern unsigned long _find_next_zero_bit_le(const void *p, unsigned long size,
> + unsigned long offset);
> +extern unsigned long _find_first_bit_le(const unsigned long *p,
> + unsigned long size);
> +extern unsigned long _find_next_bit_le(const unsigned long *p,
> + unsigned long size,
> + unsigned long offset);
>
> /*
> * Big endian assembly bitops. nr = 0 -> byte 3 bit 0.
> */
> -extern int _find_first_zero_bit_be(const void * p, unsigned size);
> -extern int _find_next_zero_bit_be(const void * p, int size, int offset);
> -extern int _find_first_bit_be(const unsigned long *p, unsigned size);
> -extern int _find_next_bit_be(const unsigned long *p, int size, int offset);
> +extern unsigned long _find_first_zero_bit_be(const void *p,
> + unsigned long size);
> +extern unsigned long _find_next_zero_bit_be(const void *p, unsigned long size,
> + unsigned long offset);
> +extern unsigned long _find_first_bit_be(const unsigned long *p,
> + unsigned long size);
> +extern unsigned long _find_next_bit_be(const unsigned long *p,
> + unsigned long size,
> + unsigned long offset);
>
> #ifndef CONFIG_SMP
> /*
> diff --git a/arch/arm/lib/findbit.S b/arch/arm/lib/findbit.S
> index 64f6bc1..817dd70 100644
> --- a/arch/arm/lib/findbit.S
> +++ b/arch/arm/lib/findbit.S
> @@ -19,7 +19,8 @@
>
> /*
> * Purpose : Find a 'zero' bit
> - * Prototype: int find_first_zero_bit(void *addr, unsigned int maxbit);
> + * Prototype: unsigned long find_first_zero_bit(const void *p,
> + * unsigned long size);
> */
> ENTRY(_find_first_zero_bit_le)
> teq r1, #0
> @@ -40,7 +41,9 @@ ENDPROC(_find_first_zero_bit_le)
>
> /*
> * Purpose : Find next 'zero' bit
> - * Prototype: int find_next_zero_bit(void *addr, unsigned int maxbit, int offset)
> + * Prototype: unsigned long find_next_zero_bit(const void *p,
> + * unsigned long size,
> + * unsigned long offset);
> */
> ENTRY(_find_next_zero_bit_le)
> teq r1, #0
> @@ -60,7 +63,8 @@ ENDPROC(_find_next_zero_bit_le)
>
> /*
> * Purpose : Find a 'one' bit
> - * Prototype: int find_first_bit(const unsigned long *addr, unsigned int maxbit);
> + * Prototype: unsigned long find_first_bit(const unsigned long *p,
> + * unsigned long size);
> */
> ENTRY(_find_first_bit_le)
> teq r1, #0
> @@ -81,7 +85,9 @@ ENDPROC(_find_first_bit_le)
>
> /*
> * Purpose : Find next 'one' bit
> - * Prototype: int find_next_zero_bit(void *addr, unsigned int maxbit, int offset)
> + * Prototype: unsigned long find_next_bit(const unsigned long *p,
> + * unsigned long size,
> + * unsigned long offset);
> */
> ENTRY(_find_next_bit_le)
> teq r1, #0
> diff --git a/arch/m68k/include/asm/bitops.h b/arch/m68k/include/asm/bitops.h
> index c6baa91..b1d8752 100644
> --- a/arch/m68k/include/asm/bitops.h
> +++ b/arch/m68k/include/asm/bitops.h
> @@ -320,11 +320,11 @@ static inline int bfchg_mem_test_and_change_bit(int nr,
> #include <asm-generic/bitops/ffz.h>
> #else
>
> -static inline int find_first_zero_bit(const unsigned long *vaddr,
> - unsigned size)
> +static inline unsigned long find_first_zero_bit(const unsigned long *vaddr,
> + unsigned long size)
> {
> const unsigned long *p = vaddr;
> - int res = 32;
> + unsigned int res = 32;
> unsigned int words;
> unsigned long num;
>
> @@ -346,11 +346,12 @@ out:
> }
> #define find_first_zero_bit find_first_zero_bit
>
> -static inline int find_next_zero_bit(const unsigned long *vaddr, int size,
> - int offset)
> +static inline unsigned long find_next_zero_bit(const unsigned long *vaddr,
> + unsigned long size,
> + unsigned long offset)
> {
> const unsigned long *p = vaddr + (offset >> 5);
> - int bit = offset & 31UL, res;
> + unsigned int bit = offset & 31UL, res;
>
> if (offset >= size)
> return size;
> @@ -376,10 +377,11 @@ static inline int find_next_zero_bit(const unsigned long *vaddr, int size,
> }
> #define find_next_zero_bit find_next_zero_bit
>
> -static inline int find_first_bit(const unsigned long *vaddr, unsigned size)
> +static inline unsigned long find_first_bit(const unsigned long *vaddr,
> + unsigned long size)
> {
> const unsigned long *p = vaddr;
> - int res = 32;
> + unsigned int res = 32;
> unsigned int words;
> unsigned long num;
>
> @@ -401,11 +403,12 @@ out:
> }
> #define find_first_bit find_first_bit
>
> -static inline int find_next_bit(const unsigned long *vaddr, int size,
> - int offset)
> +static inline unsigned long find_next_bit(const unsigned long *vaddr,
> + unsigned long size,
> + unsigned long offset)
> {
> const unsigned long *p = vaddr + (offset >> 5);
> - int bit = offset & 31UL, res;
> + unsigned int bit = offset & 31UL, res;
>
> if (offset >= size)
> return size;
>
--
Chen Gang
Asianux Corporation
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