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authorRichard Weinberger <richard@nod.at>2014-10-29 10:31:41 +0100
committerRichard Weinberger <richard@nod.at>2015-03-26 22:47:36 +0100
commit2f84c2469e2f2e94a45d86597baec10bfbf06847 (patch)
treeb0ad83d93c8cea978244fa7c579f5bf3a2e25fa6 /drivers/mtd
parentacfda79f8808518b0235eb9a13c8b5f762e43a75 (diff)
UBI: Fastmap: Introduce may_reserve_for_fm()
...and kill another #ifdef. Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/ubi/fastmap-wl.c19
-rw-r--r--drivers/mtd/ubi/wl.c7
-rw-r--r--drivers/mtd/ubi/wl.h8
3 files changed, 28 insertions, 6 deletions
diff --git a/drivers/mtd/ubi/fastmap-wl.c b/drivers/mtd/ubi/fastmap-wl.c
index 88a400c52418..c4717531b24c 100644
--- a/drivers/mtd/ubi/fastmap-wl.c
+++ b/drivers/mtd/ubi/fastmap-wl.c
@@ -359,3 +359,22 @@ static void ubi_fastmap_close(struct ubi_device *ubi)
}
kfree(ubi->fm);
}
+
+/**
+ * may_reserve_for_fm - tests whether a PEB shall be reserved for fastmap.
+ * See find_mean_wl_entry()
+ *
+ * @ubi: UBI device description object
+ * @e: physical eraseblock to return
+ * @root: RB tree to test against.
+ */
+static struct ubi_wl_entry *may_reserve_for_fm(struct ubi_device *ubi,
+ struct ubi_wl_entry *e,
+ struct rb_root *root) {
+ if (e && !ubi->fm_disabled && !ubi->fm &&
+ e->pnum < UBI_FM_MAX_START)
+ e = rb_entry(rb_next(root->rb_node),
+ struct ubi_wl_entry, u.rb);
+
+ return e;
+}
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index c56c7a16c03b..94ffdeb370c1 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -361,15 +361,10 @@ static struct ubi_wl_entry *find_mean_wl_entry(struct ubi_device *ubi,
if (last->ec - first->ec < WL_FREE_MAX_DIFF) {
e = rb_entry(root->rb_node, struct ubi_wl_entry, u.rb);
-#ifdef CONFIG_MTD_UBI_FASTMAP
/* If no fastmap has been written and this WL entry can be used
* as anchor PEB, hold it back and return the second best
* WL entry such that fastmap can use the anchor PEB later. */
- if (e && !ubi->fm_disabled && !ubi->fm &&
- e->pnum < UBI_FM_MAX_START)
- e = rb_entry(rb_next(root->rb_node),
- struct ubi_wl_entry, u.rb);
-#endif
+ e = may_reserve_for_fm(ubi, e, root);
} else
e = find_wl_entry(ubi, root, WL_FREE_MAX_DIFF/2);
diff --git a/drivers/mtd/ubi/wl.h b/drivers/mtd/ubi/wl.h
index 4046ccf8942b..fbc2d8e312df 100644
--- a/drivers/mtd/ubi/wl.h
+++ b/drivers/mtd/ubi/wl.h
@@ -13,6 +13,9 @@ static inline void ubi_fastmap_init(struct ubi_device *ubi, int *count)
*count += (ubi->fm_size / ubi->leb_size) * 2;
INIT_WORK(&ubi->fm_work, update_fastmap_work_fn);
}
+static struct ubi_wl_entry *may_reserve_for_fm(struct ubi_device *ubi,
+ struct ubi_wl_entry *e,
+ struct rb_root *root);
#else /* !CONFIG_MTD_UBI_FASTMAP */
static struct ubi_wl_entry *get_peb_for_wl(struct ubi_device *ubi);
static inline int is_fm_block(struct ubi_device *ubi, int pnum)
@@ -21,5 +24,10 @@ static inline int is_fm_block(struct ubi_device *ubi, int pnum)
}
static inline void ubi_fastmap_close(struct ubi_device *ubi) { }
static inline void ubi_fastmap_init(struct ubi_device *ubi, int *count) { }
+static struct ubi_wl_entry *may_reserve_for_fm(struct ubi_device *ubi,
+ struct ubi_wl_entry *e,
+ struct rb_root *root) {
+ return e;
+}
#endif /* CONFIG_MTD_UBI_FASTMAP */
#endif /* UBI_WL_H */