tree b6091bf407bc008da5fd6e68d4eaca4d543efe58
parent 81f70ba233d5f660e1ea5fe23260ee323af5d53a
author Chris Metcalf <cmetcalf@ezchip.com> 1453752334 -0500
committer Chris Metcalf <cmetcalf@ezchip.com> 1456949984 -0500

tile kgdb: fix bug in copy to gdb regs, and optimize memset

David Binderman pointed out that we were doing a full memset()
of the gdb register buffer and then doing a memcpy() to it that
was almost as big.  This commit optimizes that by only doing a
memset() of the registers that are intended to be zero.

While making this change I noticed that we were not copying the
link register (LR, number 55) due to a fencepost error in commit
f419e6f63c5a ("arch: tile: kernel: kgdb.c: Use memcpy() instead of
pointer copy one by one"), and I've corrected that as well.

Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>