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dax: Add a wakeup mode parameter to put_unlocked_entry() 

As of now put_unlocked_entry() always wakes up next waiter. In next
patches we want to wake up all waiters at one callsite. Hence, add a
parameter to the function.

This patch does not introduce any change of behavior.

Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Link: https://lore.kernel.org/r/20210428190314.1865312-3-vgoyal@redhat.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Vivek Goyal 2021-04-28 15:03:13 -04:00 committed by Dan Williams
parent 698ab77aeb
commit 4c3d043d27
1 changed files with 7 additions and 7 deletions
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14
fs/dax.c
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@ -275,11 +275,11 @@ static void wait_entry_unlocked(struct xa_state *xas, void *entry)
finish_wait(wq, &ewait.wait);
}
static void put_unlocked_entry(struct xa_state *xas, void *entry)
static void put_unlocked_entry(struct xa_state *xas, void *entry,
enum dax_wake_mode mode)
{
/* If we were the only waiter woken, wake the next one */
if (entry && !dax_is_conflict(entry))
dax_wake_entry(xas, entry, WAKE_NEXT);
dax_wake_entry(xas, entry, mode);
}
/*
@ -633,7 +633,7 @@ struct page *dax_layout_busy_page_range(struct address_space *mapping,
entry = get_unlocked_entry(&xas, 0);
if (entry)
page = dax_busy_page(entry);
put_unlocked_entry(&xas, entry);
put_unlocked_entry(&xas, entry, WAKE_NEXT);
if (page)
break;
if (++scanned % XA_CHECK_SCHED)
@ -675,7 +675,7 @@ static int __dax_invalidate_entry(struct address_space *mapping,
mapping->nrexceptional--;
ret = 1;
out:
put_unlocked_entry(&xas, entry);
put_unlocked_entry(&xas, entry, WAKE_NEXT);
xas_unlock_irq(&xas);
return ret;
}
@ -954,7 +954,7 @@ static int dax_writeback_one(struct xa_state *xas, struct dax_device *dax_dev,
return ret;
put_unlocked:
put_unlocked_entry(xas, entry);
put_unlocked_entry(xas, entry, WAKE_NEXT);
return ret;
}
@ -1695,7 +1695,7 @@ dax_insert_pfn_mkwrite(struct vm_fault *vmf, pfn_t pfn, unsigned int order)
/* Did we race with someone splitting entry or so? */
if (!entry || dax_is_conflict(entry) ||
(order == 0 && !dax_is_pte_entry(entry))) {
put_unlocked_entry(&xas, entry);
put_unlocked_entry(&xas, entry, WAKE_NEXT);
xas_unlock_irq(&xas);
trace_dax_insert_pfn_mkwrite_no_entry(mapping->host, vmf,
VM_FAULT_NOPAGE);