tree be725d9e8d0e7e3392a430e708952a93f2aff5b1
parent 3cf06f4f85aea715e8caf8540760faff2fbf86d6
author Akinobu Mita <akinobu.mita@gmail.com> 1347036486 +0900
committer David Woodhouse <David.Woodhouse@intel.com> 1348930048 +0100

mtd: mtd_nandecctest: support injecting bit error for ecc code

Currently inject_single_bit_error() is used to inject single bit error
into randomly selected bit position of the 256 or 512 bytes data block.

Later change will add tests which inject bit errors into the ecc code.
Unfortunately, inject_single_bit_error() doesn't work for the ecc code
which is not a multiple of sizeof(unsigned long).

Because bit fliping at random position is done by __change_bit().
For example, flipping bit position 0 by __change_bit(0, addr) modifies
3rd byte (32bit) or 7th byte (64bit) on big-endian systems.

Using little-endian version of bitops can fix this issue.  But
little-endian version of __change_bit is not yet available.
So this defines __change_bit_le() locally in a similar fashion to
asm-generic/bitops/le.h and use it.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>