x86/entry: Switch the stack after error_entry() returns

error_entry() calls fixup_bad_iret() before sync_regs() if it is a fault
from a bad IRET, to copy pt_regs to the kernel stack. It switches to the
kernel stack directly after sync_regs().

But error_entry() itself is also a function call, so it has to stash
the address it is going to return to, in %r12 which is unnecessarily
complicated.

Move the stack switching after error_entry() and get rid of the need to
handle the return address.

  [ bp: Massage commit message. ]

Signed-off-by: Lai Jiangshan <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

0 files changed, 0 insertions, 0 deletions