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authorJoe Korty <joe.korty@ccur.com>2008-08-25 17:15:33 -0400
committerIngo Molnar <mingo@elte.hu>2008-08-26 10:37:46 +0200
commit2189459d25a47401c69a17794c9d390c890351f9 (patch)
tree1e22875e4b4fd29e2af5e8078f5d82f814cc56fd
parent83097aca8567a0bd593534853b71fe0fa9a75d69 (diff)
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: Ingo Molnar <mingo@elte.hu>
-rw-r--r--kernel/lockdep_proc.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/lockdep_proc.c b/kernel/lockdep_proc.c
index 4b194d34d77..20dbcbf9c7d 100644
--- a/kernel/lockdep_proc.c
+++ b/kernel/lockdep_proc.c
@@ -472,8 +472,9 @@ static void snprint_time(char *buf, size_t bufsiz, s64 nr)
{
unsigned long rem;
+ nr += 5; /* for display rounding */
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)