Signed-off-by: Ivan Shapovalov <intelfx100@xxxxxxxxx>
---
fs/reiser4/discard.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/fs/reiser4/discard.c b/fs/reiser4/discard.c
index b4cd236..a615b7d 100644
--- a/fs/reiser4/discard.c
+++ b/fs/reiser4/discard.c
@@ -185,8 +185,13 @@ static inline struct list_head *get_next_at(struct list_head *pos,
return pos->next == head ? NULL : pos->next;
}
-static inline int check_free_blocks(const reiser4_block_nr start,
- const reiser4_block_nr len)
+/*
+ * Check if a given block range is free (clean) and allocate it.
+ *
+ * NOTE: this operation is not idempotent.
+ */
+static inline int try_allocate_blocks(const reiser4_block_nr start,
+ const reiser4_block_nr len)
{
/*
* NOTE: we do not use BA_PERMANENT in out allocations
@@ -321,7 +326,7 @@ static int discard_precise_extents(struct list_head *head)
}
else if (p_start >= p_headp /* discard unit is complete */ &&
!headp_is_known_dirty &&
- check_free_blocks(start - headp, headp)) {
+ try_allocate_blocks(start - headp, headp)) {
/*
* pad the head
*/
@@ -379,7 +384,7 @@ static int discard_precise_extents(struct list_head *head)
* check space between the extents;
* if it is free, then allocate it
*/
- if (check_free_blocks(end, next_start - end)) {
+ if (try_allocate_blocks(end, next_start - end)) {
/*
* jump to the glued extent
*/
@@ -422,7 +427,7 @@ static int discard_precise_extents(struct list_head *head)
*/
if (tailp == 0)
break;
- else if (check_free_blocks(end, tailp)) {
+ else if (try_allocate_blocks(end, tailp)) {
/*
* tail padding is clean,
* pad the tail
--
2.3.0
--
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