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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>
This commit is contained in:
Benjamin Herrenschmidt 2016-07-05 15:03:46 +10:00 committed by Michael Ellerman
parent bd7c93cca3
commit 63c254a501
1 changed files with 4 additions and 2 deletions
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6
arch/powerpc/kernel/setup_64.c
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@ -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();