3 Commits (11bf04c44fd284a5f4e2348a04da6f749cace250)

Author	SHA1	Message	Date
Gerald Schaefer	59f35d53fd	[S390] Add dynamic size check for usercopy functions. ... Use a wrapper for copy_to/from_user to chose the best usercopy method. The mvcos instruction is better for sizes greater than 256 bytes, if mvcos is not available a page table walk is better for sizes greater than 1024 bytes. Also removed the redundant copy_to/from_user_std_small functions. Signed-off-by: Gerald Schaefer <geraldsc@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>	18 years ago
Martin Schwidefsky	52149ba6b0	[S390] user readable uninitialised kernel memory. ... A user space program can read uninitialised kernel memory by appending to a file from a bad address and then reading the result back. The cause is the copy_from_user function that does not clear the remaining bytes of the kernel buffer after it got a fault on the user space address. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>	19 years ago
Gerald Schaefer	6c2a9e6df6	[S390] Use alternative user-copy operations for new hardware. ... This introduces new user-copy operations which are optimized for copying more than 256 Bytes on new hardware. Signed-off-by: Gerald Schaefer <geraldsc@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>	19 years ago