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[PATCH] swsusp: simpler calculation of number of pages in PBE list

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The function calc_nr uses an iterative algorithm to calculate the number of
pages needed for the image and the pagedir.  Exactly the same result can be
obtained with a one-line expression.

Note that this was even proved correct ;-).

Signed-off-by: Michal Schmidt <[email protected]>
Signed-off-by: Pavel Machek <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Michal Schmidt 2005-09-03 15:57:02 -07:00 • committed by Linus Torvalds
commit 56057e1a12
1 changed files with 1 additions and 12 deletions
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13
kernel/power/swsusp.c
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@ -737,18 +737,7 @@ static void copy_data_pages(void)
static int calc_nr(int nr_copy)
{
int extra = 0;
int mod = !!(nr_copy % PBES_PER_PAGE);
int diff = (nr_copy / PBES_PER_PAGE) + mod;
do {
extra += diff;
nr_copy += diff;
mod = !!(nr_copy % PBES_PER_PAGE);
diff = (nr_copy / PBES_PER_PAGE) + mod - extra;
} while (diff > 0);
return nr_copy;
return nr_copy + (nr_copy+PBES_PER_PAGE-2)/(PBES_PER_PAGE-1);
}
/**