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Date: Fri, 05 Jul 2013 09:09:31 +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>,
Greg KH <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v3] arch/*/asm/include/bitops.h: api issue, find_*_bit()
defination are different with each other
Hello Maintainers:
Please help check this patch whether OK, when you have time.
Thanks.
On 06/18/2013 11:33 AM, Chen Gang wrote:
> 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
--
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