UBI: do not use vmalloc on I/O path
Similar reason as in case of the previous patch: it causes
deadlocks if a filesystem with writeback support works on top
of UBI. So pre-allocate needed buffers when attaching MTD device.
We also need mutexes to protect the buffers, but they do not
cause much contantion because they are used in recovery, torture,
and WL copy routines, which are called seldom.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
diff --git a/drivers/mtd/ubi/vtbl.c b/drivers/mtd/ubi/vtbl.c
index b0a1e84..25b3bd6 100644
--- a/drivers/mtd/ubi/vtbl.c
+++ b/drivers/mtd/ubi/vtbl.c
@@ -254,7 +254,7 @@
* This function returns zero in case of success and a negative error code in
* case of failure.
*/
-static int create_vtbl(const struct ubi_device *ubi, struct ubi_scan_info *si,
+static int create_vtbl(struct ubi_device *ubi, struct ubi_scan_info *si,
int copy, void *vtbl)
{
int err, tries = 0;
@@ -339,7 +339,7 @@
* not corrupted, and recovering from corruptions if needed. Returns volume
* table in case of success and a negative error code in case of failure.
*/
-static struct ubi_vtbl_record *process_lvol(const struct ubi_device *ubi,
+static struct ubi_vtbl_record *process_lvol(struct ubi_device *ubi,
struct ubi_scan_info *si,
struct ubi_scan_volume *sv)
{
@@ -453,7 +453,7 @@
* This function returns volume table contents in case of success and a
* negative error code in case of failure.
*/
-static struct ubi_vtbl_record *create_empty_lvol(const struct ubi_device *ubi,
+static struct ubi_vtbl_record *create_empty_lvol(struct ubi_device *ubi,
struct ubi_scan_info *si)
{
int i;