s390/uaccess: Separate key uaccess functions

Browse source

Implement separate raw_copy_to_user_key() and raw_copy_from_user_key()
functions, which allows to remove the open-coded operand access control
handling from the normal raw_copy_to_user() / raw_copy_from_user()
functions - they are simplified to use immediate instructions to load
hard-coded operand access control values into register zero, which saves
one instruction.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

...

This commit is contained in:

Heiko Carstens 2025-02-11 20:19:27 +01:00 • committed by Vasily Gorbik

parent c488f5187a

commit bc6029239c

2 changed files with 92 additions and 52 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

58

arch/s390/include/asm/uaccess.h

View file

86

arch/s390/lib/uaccess.c

View file