Commit 63c254a5 authored Jul 05, 2016 by Benjamin Herrenschmidt Committed by Michael Ellerman Jul 11, 2016

powerpc: Add comment explaining the purpose of setup_kdump_trampoline()



Anything in early_setup() needs to be justified to be there, in
this case, we need the trampolines before we can take exceptions
and thus before we turn on the MMU.

Also remove a pretty meaningless and misplaced debug message

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[mpe: Fix comment formatting]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent bd7c93cc

arch/powerpc/kernel/setup_64.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -279,10 +279,12 @@ void __init early_setup(unsigned long dt_ptr)
		/* Probe the machine type */
		probe_machine();

		/*
		* Setup the trampolines from the lowmem exception vectors
		* to the kdump kernel when not using a relocatable kernel.
		*/
		setup_kdump_trampoline();

		DBG("Found, Initializing memory management...\n");

		/* Initialize the hash table or TLB handling */
		early_init_mmu();