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Commit 2189459d authored by Joe Korty's avatar Joe Korty Committed by Ingo Molnar
Browse files

lockstat: fix numerical output rounding error 



Fix rounding error in /proc/lock_stat numerical output.

On occasion the two digit fractional part contains the three
digit value '100'.  This is due to a bug in the rounding algorithm
which pushes values in the range '95..99' to '100' rather than
to '00' + an increment to the integer part.  For example,

	- 123456.100      old display
	+ 123457.00	  new display

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 83097aca

kernel/lockdep_proc.c

+2 −1
Original line number Original line Diff line number Diff line
@@ -472,8 +472,9 @@ static void snprint_time(char *buf, size_t bufsiz, s64 nr) 
{

{

	unsigned long rem;

	unsigned long rem;





	nr += 5; /* for display rounding */

	rem = do_div(nr, 1000); /* XXX: do_div_signed */

	rem = do_div(nr, 1000); /* XXX: do_div_signed */

	snprintf(buf, bufsiz, "%lld.%02d", (long long)nr, ((int)rem+5)/10);

	snprintf(buf, bufsiz, "%lld.%02d", (long long)nr, (int)rem/10);

}

}





static void seq_time(struct seq_file *m, s64 time)

static void seq_time(struct seq_file *m, s64 time)