linux-kernel - Re: [patch 1/2] i386: use asm() like the other atomic operations already do.

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Date:	Wed, 15 Aug 2007 09:04:07 +0200
From:	Sebastian Siewior <sebastian@...akpoint.cc>
To:	Andi Kleen <ak@...e.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [patch 1/2] i386: use asm() like the other atomic operations
	already do.

* Andi Kleen | 2007-08-15 02:20:35 [+0200]:

>> My config with march=pentium-m and gcc (GCC) 4.1.2 (Gentoo 4.1.2):
>>   text    data     bss     dec     hex filename
>> 3434150  249176  176128 3859454  3ae3fe atomic_normal/vmlinux
>> 3435308  249176  176128 3860612  3ae884 atomic_inlineasm/vmlinux
>
>What is the difference between atomic_normal and atomic_inlineasm? 
atomic normal is Linus' tree, commit 28e8351. Inline asm is with this
patch. I wrote this in 0/2 (you want this here as well?).

>
>>  /**
>>   * atomic_read - read atomic variable
>>   * @v: pointer of type atomic_t
>> - * 
>> + *
>
>Please don't change white space in patches
I fixed white space errors. SubmitChecklist:24 says I should not
introduce any new ones so fixing existig sounds like the right thing to
do.
No white space fixing in future?

>
>>   * Atomically reads the value of @v.
>> - */ 
>> -#define atomic_read(v)		((v)->counter)
>> + */
>> +static __inline__ int atomic_read(const atomic_t *v)
>> +{
>> +	int t;
>> +
>> +	__asm__ __volatile__(
>
>And don't use __*__ in new code
Okey.

>
>-Andi

Sebastian
-
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