Re: [patch] smarter atime updates

[Andrew Morton]

OGAWA Hirofumi wrote:
> 
> #define UPDATE_ATIME(inode)                     \
> do {                                            \
>         if ((inode)->i_atime != CURRENT_TIME)   \
>                 update_atime (inode);           \
> } while (0)
> 

yes, that'd be fine.  The more conventional approach
would be to blow away the strange UPPER CASE name and:

static inline void update_atime(struct inode *inode)
{
	if (inode->i_atime != CURRENT_TIME)
		__update_atime(inode);
}

But that would be a bigger patch, and I rather like shaving
off three quarters of the sys_read() overhead with a two-liner ;)

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