x86: fix bad pmd ffff810000207xxx(9090909090909090)
commit2884f110d5409714f3a04eeb6d2ecd77da66b242
authorHugh Dickins <hugh@veritas.com>
Wed, 28 May 2008 18:36:07 +0000 (28 19:36 +0100)
committerThomas Gleixner <tglx@linutronix.de>
Wed, 4 Jun 2008 11:11:47 +0000 (4 13:11 +0200)
tree667c911e164c0e528dc12edd9499224dffd9e1b7
parent226e9a93a253b7d8811b5ed9ac671c6c5a728022
x86: fix bad pmd ffff810000207xxx(9090909090909090)

OGAWA Hirofumi and Fede have reported rare pmd_ERROR messages:
mm/memory.c:127: bad pmd ffff810000207xxx(9090909090909090).

Initialization's cleanup_highmap was leaving alignment filler
behind in the pmd for MODULES_VADDR: when vmalloc's guard page
would occupy a new page table, it's not allocated, and then
module unload's vfree hits the bad 9090 pmd entry left over.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
arch/x86/mm/init_64.c