What does `PAGE_ALIGN` do to and `unsigned int`? shouldn't it get an address?

Question

In some framebuffer configuration code I had seen these lines:

static unsigned int max_size = 0;

max_size = max(max_size, 8*(mi->xres * (mi->xres + mi->yres)));
    }

max_size = PAGE_ALIGN(max_size);

What does PAGE_ALIGN do to and unsigned int? shouldn't it get an address?

mi is `struct fb_videomode *`

score 3 · Accepted Answer · answered Dec 02 '12 at 20:14

It rounds the size up to an exact multiple of the page size (often something like 4k, though implementation-dependent).

In this case, it's not applying to an absolute address, but instead to a size - which will likely become a difference between addresses.

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