KVM: PPC: Book3S HV: use get_user()/put_user() for the HPT fd

kvm_htab_read() and kvm_htab_write() check the user buffer with
access_ok() once and then move each HPT entry with two __put_user() or
__get_user() calls, with real work between entries.  Each of those
accesses opens and closes user access on its own, so the up-front check
saves nothing.

Use put_user() and get_user().  On powerpc the only difference is the
address check: __get_user() and __put_user() already do might_fault().
kvm_htab_write() holds mmu_setup_lock across the loop, but it already
reads each header with __copy_from_user() under that lock, so nothing
new happens under it.  The access_ok() calls stay.

This is part of getting rid of __get_user() and __put_user() entirely.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

0 files changed, 0 insertions, 0 deletions