On Sat, Jan 26, 2008 at 06:35:41PM +0000, Tigran Aivazian wrote:
> On Sat, 26 Jan 2008, Dmitri Vorobiev wrote:
>> - inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
>> + inode->i_mtime = CURRENT_TIME_SEC;
>> + inode->i_atime = CURRENT_TIME_SEC;
>> + inode->i_ctime = CURRENT_TIME_SEC;
>
> multiple assignments like "x = y = z = value;" can potentially (depending
> on the compiler and arch) be faster than "x = value; y = value; z=value;"
Only depending on the compiler, and recent gcc versions are quite good
at optimizing code.
> I am surprized that this script complains about them as it is a perfectly
> valid thing to do in C.
Checkpatch warns about the something already documented in
Documentation/CodingStyle:
<-- snip -->
Don't put multiple assignments on a single line either. Kernel coding style
is super simple. Avoid tricky expressions.
<-- snip -->
Nobody claims it wasn't perfectly valid C code, the point is that
multiple assignments on a single line are harder to read.
> But this is not a "big deal", so I don't mind.
>
> Kind regards
> Tigran
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
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