tree 83cdc2a20b1300f1f19c106f3de9ec9ab4ecb71f
parent 97f274ef3bc9a263d863656aa230324b15c4f46e
author Christophe Leroy <christophe.leroy@c-s.fr> 1544801013 +0000
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1575556485 +0100

powerpc/mm: Make NULL pointer deferences explicit on bad page faults.

[ Upstream commit 49a502ea23bf9dec47f8f3c3960909ff409cd1bb ]

As several other arches including x86, this patch makes it explicit
that a bad page fault is a NULL pointer dereference when the fault
address is lower than PAGE_SIZE

In the mean time, this page makes all bad_page_fault() messages
shorter so that they remain on one single line. And it prefixes them
by "BUG: " so that they get easily grepped.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[mpe: Avoid pr_cont()]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>