UBI: allocate verification buffer on demand

From: Josselin Costanzi <[email protected]>

With recent Nand (2MiB erase block), UBI/UBIFS is allocating a lot of RAM each time a mtd device is attached and each time a ubifs volume is mounted. The following patch makes UBI allocate peb_buf2 on demand.

Note: I'm not sure using vmalloc while holding buf_mutex is okay or not. I'm waiting for you comments.

Josselin Costanzi (1):
UBI: allocate verification buffer on demand

 drivers/mtd/ubi/build.c |    6 ------
 drivers/mtd/ubi/eba.c   |   31 +++++++++++++++++++++++++++----
 drivers/mtd/ubi/ubi.h   |    4 +---
 3 files changed, 28 insertions(+), 13 deletions(-)

1.7.5.4