Commits
Will Deacon committed 85487edd252
arm64: ptrace: fix compat reg getter/setter return values
copy_{to,from}_user return the number of bytes remaining on failure, not
an error code.
This patch returns -EFAULT when the copy operation didn't complete,
rather than expose the number of bytes not copied directly to userspace.
Signed-off-by: Will Deacon <will.deacon@arm.com>