Factor out common condition checking code to dev_need_for_write()
to improve readability - please suggest a better name :)
Besides, a couple of wierd whitespace fixes are contained also.
Maybe the checkpatch hates some change but it looks more natural
to fix IMHO.
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxx>
---
drivers/md/raid5.c | 47 ++++++++++++++++++++++++-----------------------
1 files changed, 24 insertions(+), 23 deletions(-)
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 892a95fe6e8f..12f3b939e56d 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -2542,6 +2542,18 @@ static void handle_stripe_clean_event(raid5_conf_t *conf,
md_wakeup_thread(conf->mddev->thread);
}
+static bool dev_need_for_write(struct r5dev *dev)
+{
+ if (test_bit(R5_LOCKED, &dev->flags))
+ return false;
+
+ if (!test_bit(R5_UPTODATE, &dev->flags) &&
+ !test_bit(R5_Wantcompute, &dev->flags))
+ return true;
+
+ return false;
+}
+
static void handle_stripe_dirtying5(raid5_conf_t *conf,
struct stripe_head *sh, struct stripe_head_state *s, int disks)
{
@@ -2550,20 +2562,18 @@ static void handle_stripe_dirtying5(raid5_conf_t *conf,
/* would I have to read this buffer for read_modify_write */
struct r5dev *dev = &sh->dev[i];
if ((dev->towrite || i == sh->pd_idx) &&
- !test_bit(R5_LOCKED, &dev->flags) &&
- !(test_bit(R5_UPTODATE, &dev->flags) ||
- test_bit(R5_Wantcompute, &dev->flags))) {
+ dev_need_for_write(dev)) {
if (test_bit(R5_Insync, &dev->flags))
rmw++;
else
rmw += 2*disks; /* cannot read it */
}
/* Would I have to read this buffer for reconstruct_write */
- if (!test_bit(R5_OVERWRITE, &dev->flags) && i != sh->pd_idx &&
- !test_bit(R5_LOCKED, &dev->flags) &&
- !(test_bit(R5_UPTODATE, &dev->flags) ||
- test_bit(R5_Wantcompute, &dev->flags))) {
- if (test_bit(R5_Insync, &dev->flags)) rcw++;
+ if (!test_bit(R5_OVERWRITE, &dev->flags) &&
+ i != sh->pd_idx &&
+ dev_need_for_write(dev)) {
+ if (test_bit(R5_Insync, &dev->flags))
+ rcw++;
else
rcw += 2*disks;
}
@@ -2576,12 +2586,9 @@ static void handle_stripe_dirtying5(raid5_conf_t *conf,
for (i = disks; i--; ) {
struct r5dev *dev = &sh->dev[i];
if ((dev->towrite || i == sh->pd_idx) &&
- !test_bit(R5_LOCKED, &dev->flags) &&
- !(test_bit(R5_UPTODATE, &dev->flags) ||
- test_bit(R5_Wantcompute, &dev->flags)) &&
+ dev_need_for_write(dev) &&
test_bit(R5_Insync, &dev->flags)) {
- if (
- test_bit(STRIPE_PREREAD_ACTIVE, &sh->state)) {
+ if (test_bit(STRIPE_PREREAD_ACTIVE, &sh->state)) {
pr_debug("Read_old block "
"%d for r-m-w\n", i);
set_bit(R5_LOCKED, &dev->flags);
@@ -2599,12 +2606,9 @@ static void handle_stripe_dirtying5(raid5_conf_t *conf,
struct r5dev *dev = &sh->dev[i];
if (!test_bit(R5_OVERWRITE, &dev->flags) &&
i != sh->pd_idx &&
- !test_bit(R5_LOCKED, &dev->flags) &&
- !(test_bit(R5_UPTODATE, &dev->flags) ||
- test_bit(R5_Wantcompute, &dev->flags)) &&
+ dev_need_for_write(dev) &&
test_bit(R5_Insync, &dev->flags)) {
- if (
- test_bit(STRIPE_PREREAD_ACTIVE, &sh->state)) {
+ if (test_bit(STRIPE_PREREAD_ACTIVE, &sh->state)) {
pr_debug("Read_old block "
"%d for Reconstruct\n", i);
set_bit(R5_LOCKED, &dev->flags);
@@ -2645,15 +2649,12 @@ static void handle_stripe_dirtying6(raid5_conf_t *conf,
/* check if we haven't enough data */
if (!test_bit(R5_OVERWRITE, &dev->flags) &&
i != pd_idx && i != qd_idx &&
- !test_bit(R5_LOCKED, &dev->flags) &&
- !(test_bit(R5_UPTODATE, &dev->flags) ||
- test_bit(R5_Wantcompute, &dev->flags))) {
+ dev_need_for_write(dev)) {
rcw++;
if (!test_bit(R5_Insync, &dev->flags))
continue; /* it's a failed drive */
- if (
- test_bit(STRIPE_PREREAD_ACTIVE, &sh->state)) {
+ if (test_bit(STRIPE_PREREAD_ACTIVE, &sh->state)) {
pr_debug("Read_old stripe %llu "
"block %d for Reconstruct\n",
(unsigned long long)sh->sector, i);
--
1.7.5.2
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