tree 936f6c517e2d8acd927a0b9e30ab07ed8b9ae58f
parent 030babac6ae54df64ae3bba4685ecb1d8d8dd8c3
author Neil Brown <[EMAIL PROTECTED]> Fri, 15 Jul 2005 17:56:27 -0700
committer Linus Torvalds <[EMAIL PROTECTED]> Fri, 15 Jul 2005 23:54:50 -0700
[PATCH] Fix raid0's attempt to divide by 64bit numbers
Apparently sector_div is only guaranteed to work with a 32bit divisor, even
on 64bit architectures. So allow for this in raid0.
Signed-off-by: Neil Brown <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
drivers/md/raid0.c | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -314,16 +314,16 @@ static int raid0_run (mddev_t *mddev)
sector_t space = conf->hash_spacing;
int round;
conf->preshift = 0;
- if (sizeof(sector_t) > sizeof(unsigned long)) {
+ if (sizeof(sector_t) > sizeof(u32)) {
/*shift down space and s so that sector_div will work */
- while (space > (sector_t) (~(unsigned long)0)) {
+ while (space > (sector_t) (~(u32)0)) {
s >>= 1;
space >>= 1;
s += 1; /* force round-up */
conf->preshift++;
}
}
- round = sector_div(s, (unsigned long)space) ? 1 : 0;
+ round = sector_div(s, (u32)space) ? 1 : 0;
nb_zone = s + round;
}
printk("raid0 : nb_zone is %d.\n", nb_zone);
@@ -443,7 +443,7 @@ static int raid0_make_request (request_q
volatile
#endif
sector_t x = block >> conf->preshift;
- sector_div(x, (unsigned long)conf->hash_spacing);
+ sector_div(x, (u32)conf->hash_spacing);
zone = conf->hash_table[x];
}
-
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