diff options
| author | Michael Neuling <mikey@neuling.org> | 2010-11-17 16:32:59 +0000 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2010-12-14 23:40:03 +0100 |
| commit | ae813a8a26a9f2df98e66471766f04522c7bbe8c (patch) | |
| tree | 33dd03f300ab054a1c6be590e6f0369d4a94d1d1 /arch | |
| parent | 4d610bd1b4eccec1002bddd584f47d1bfe612e2d (diff) | |
powerpc: Fix call to subpage_protection()
commit 1c2c25c78740b2796c7c06640784cb6732fa4907 upstream.
In:
powerpc/mm: Fix pgtable cache cleanup with CONFIG_PPC_SUBPAGE_PROT
commit d28513bc7f675d28b479db666d572e078ecf182d
Author: David Gibson <david@gibson.dropbear.id.au>
subpage_protection() was changed to to take an mm rather a pgdir but it
didn't change calling site in hashpage_preload(). The change wasn't
noticed at compile time since hashpage_preload() used a void* as the
parameter to subpage_protection().
This is obviously wrong and can trigger the following crash when
CONFIG_SLAB, CONFIG_DEBUG_SLAB, CONFIG_PPC_64K_PAGES
CONFIG_PPC_SUBPAGE_PROT are enabled.
Freeing unused kernel memory: 704k freed
Unable to handle kernel paging request for data at address 0x6b6b6b6b6b6c49b7
Faulting instruction address: 0xc0000000000410f4
cpu 0x2: Vector: 300 (Data Access) at [c00000004233f590]
pc: c0000000000410f4: .hash_preload+0x258/0x338
lr: c000000000041054: .hash_preload+0x1b8/0x338
sp: c00000004233f810
msr: 8000000000009032
dar: 6b6b6b6b6b6c49b7
dsisr: 40000000
current = 0xc00000007e2c0070
paca = 0xc000000007fe0500
pid = 1, comm = init
enter ? for help
[c00000004233f810] c000000000041020 .hash_preload+0x184/0x338 (unreliable)
[c00000004233f8f0] c00000000003ed98 .update_mmu_cache+0xb0/0xd0
[c00000004233f990] c000000000157754 .__do_fault+0x48c/0x5dc
[c00000004233faa0] c000000000158fd0 .handle_mm_fault+0x508/0xa8c
[c00000004233fb90] c0000000006acdd4 .do_page_fault+0x428/0x6ac
[c00000004233fe30] c000000000005260 handle_page_fault+0x20/0x74
Reported-by: Jim Keniston <jkenisto@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
cc: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/mm/hash_utils_64.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index 09dffe6efa4..1eb64ba43a0 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -1122,7 +1122,7 @@ void hash_preload(struct mm_struct *mm, unsigned long ea, else #endif /* CONFIG_PPC_HAS_HASH_64K */ rc = __hash_page_4K(ea, access, vsid, ptep, trap, local, ssize, - subpage_protection(pgdir, ea)); + subpage_protection(mm, ea)); /* Dump some info in case of hash insertion failure, they should * never happen so it is really useful to know if/when they do |