tree aedbdd51b2558d9badd12cb68e5ecc4ed5823474
parent 9fb1b36ca1234e64a5d1cc573175303395e3354d
author Benjamin Herrenschmidt <benh@kernel.crashing.org> 1346771308 +0000
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1346825123 +1000

powerpc: Don't use __put_user() in patch_instruction

patch_instruction() can be called very early on ppc32, when the kernel
isn't yet running at it's linked address. That can cause the !
is_kernel_addr() test in __put_user() to trip and call might_sleep()
which is very bad at that point during boot.

Use a lower level function instead for now, at least until we get to
rework ppc32 boot process to do the code patching later, like ppc64
does.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>