git.stricted.de - GitHub/moto-9609/android_kernel_motorola

author	Heiko Carstens <heiko.carstens@de.ibm.com>
	Wed, 20 Feb 2013 12:59:26 +0000 (13:59 +0100)
committer	Martin Schwidefsky <schwidefsky@de.ibm.com>
	Thu, 28 Feb 2013 08:37:07 +0000 (09:37 +0100)
commit	d7b788cd06a3080ebf0b2f5f2e008d4fda2b336e
tree	69441ca08ebf084277bc3d944bdde8d0ccdb8ecb	tree \| snapshot (tar.gz zip)
parent	ea4da6eae393dbbb26800700a38cf1b32c9109fd	commit \| diff

s390/uaccess: shorten strncpy_from_user/strnlen_user

Always stay within page boundaries when copying from user within
strlen_user_mvcos()/strncpy_from_user_mvcos(). This allows to
shorten the code a bit and may prevent unnecessary faults, since
we copy quite large amounts of memory to kernel space.

Also directly call the mvcos variants of copy_from_user() to
avoid indirect branches.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>