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md/raid5: call break_stripe_batch_list from handle_stripe_clean_event 

Now that the code in break_stripe_batch_list() is nearly identical
to the end of handle_stripe_clean_event, replace the later
with a function call.

The only remaining difference of any interest is the masking that is
applieds to dev[i].flags copied from head_sh.
R5_WriteError certainly isn't wanted as it is set per-stripe, not
per-patch.  R5_Overlap isn't wanted as it is explicitly handled.

Signed-off-by: NeilBrown <neilb@suse.de>
hifive-unleashed-5.1
NeilBrown 2015-05-21 12:56:41 +10:00
parent 1b956f7a8f
commit 787b76fa37
1 changed files with 4 additions and 57 deletions
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61
drivers/md/raid5.c
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@ -3420,6 +3420,8 @@ static void handle_stripe_fill(struct stripe_head *sh,
set_bit(STRIPE_HANDLE, &sh->state);
}
static void break_stripe_batch_list(struct stripe_head *head_sh,
unsigned long handle_flags);
/* handle_stripe_clean_event
* any written block on an uptodate or failed drive can be returned.
* Note that if we 'wrote' to a failed drive, it will be UPTODATE, but
@ -3433,7 +3435,6 @@ static void handle_stripe_clean_event(struct r5conf *conf,
int discard_pending = 0;
struct stripe_head *head_sh = sh;
bool do_endio = false;
int wakeup_nr = 0;
for (i = disks; i--; )
if (sh->dev[i].written) {
@ -3522,62 +3523,8 @@ unhash:
if (atomic_dec_and_test(&conf->pending_full_writes))
md_wakeup_thread(conf->mddev->thread);
if (!head_sh->batch_head || !do_endio)
return;
for (i = 0; i < head_sh->disks; i++) {
if (test_and_clear_bit(R5_Overlap, &head_sh->dev[i].flags))
wakeup_nr++;
}
while (!list_empty(&head_sh->batch_list)) {
int i;
sh = list_first_entry(&head_sh->batch_list,
struct stripe_head, batch_list);
list_del_init(&sh->batch_list);
WARN_ON_ONCE(sh->state & ((1 << STRIPE_ACTIVE) |
(1 << STRIPE_SYNCING) |
(1 << STRIPE_REPLACED) |
(1 << STRIPE_PREREAD_ACTIVE) |
(1 << STRIPE_DELAYED) |
(1 << STRIPE_BIT_DELAY) |
(1 << STRIPE_FULL_WRITE) |
(1 << STRIPE_BIOFILL_RUN) |
(1 << STRIPE_COMPUTE_RUN) |
(1 << STRIPE_OPS_REQ_PENDING) |
(1 << STRIPE_DISCARD) |
(1 << STRIPE_BATCH_READY) |
(1 << STRIPE_BATCH_ERR) |
(1 << STRIPE_BITMAP_PENDING)));
WARN_ON_ONCE(head_sh->state & ((1 << STRIPE_DISCARD) |
(1 << STRIPE_REPLACED)));
set_mask_bits(&sh->state, ~(STRIPE_EXPAND_SYNC_FLAGS |
(1 << STRIPE_DEGRADED)),
head_sh->state & (1 << STRIPE_INSYNC));
sh->check_state = head_sh->check_state;
sh->reconstruct_state = head_sh->reconstruct_state;
for (i = 0; i < sh->disks; i++) {
if (test_and_clear_bit(R5_Overlap, &sh->dev[i].flags))
wakeup_nr++;
sh->dev[i].flags = head_sh->dev[i].flags;
}
spin_lock_irq(&sh->stripe_lock);
sh->batch_head = NULL;
spin_unlock_irq(&sh->stripe_lock);
if (sh->state & STRIPE_EXPAND_SYNC_FLAGS)
set_bit(STRIPE_HANDLE, &sh->state);
release_stripe(sh);
}
spin_lock_irq(&head_sh->stripe_lock);
head_sh->batch_head = NULL;
spin_unlock_irq(&head_sh->stripe_lock);
if (wakeup_nr)
wake_up(&conf->wait_for_overlap);
if (head_sh->state & STRIPE_EXPAND_SYNC_FLAGS)
set_bit(STRIPE_HANDLE, &head_sh->state);
if (head_sh->batch_head && do_endio)
break_stripe_batch_list(head_sh, STRIPE_EXPAND_SYNC_FLAGS);
}
static void handle_stripe_dirtying(struct r5conf *conf,