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| author | Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2019-03-09 17:37:21 +0530 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2019-03-13 13:58:46 -0700 |
| commit | 11cf9d863dcb583345723b0ed72173348761e9c0 (patch) | |
| tree | bad3b78bca6faa12ff8d3087e20aba15a6e1bad7 /drivers/macintosh | |
| parent | e4b3448bc346fedf36db64124a664a959995b085 (diff) | |
| download | linux-11cf9d863dcb583345723b0ed72173348761e9c0.tar.bz2 | |
fs/dax: Deposit pagetable even when installing zero page
Architectures like ppc64 use the deposited page table to store hardware
page table slot information. Make sure we deposit a page table when
using zero page at the pmd level for hash.
Without this we hit
Unable to handle kernel paging request for data at address 0x00000000
Faulting instruction address: 0xc000000000082a74
Oops: Kernel access of bad area, sig: 11 [#1]
....
NIP [c000000000082a74] __hash_page_thp+0x224/0x5b0
LR [c0000000000829a4] __hash_page_thp+0x154/0x5b0
Call Trace:
hash_page_mm+0x43c/0x740
do_hash_page+0x2c/0x3c
copy_from_iter_flushcache+0xa4/0x4a0
pmem_copy_from_iter+0x2c/0x50 [nd_pmem]
dax_copy_from_iter+0x40/0x70
dax_iomap_actor+0x134/0x360
iomap_apply+0xfc/0x1b0
dax_iomap_rw+0xac/0x130
ext4_file_write_iter+0x254/0x460 [ext4]
__vfs_write+0x120/0x1e0
vfs_write+0xd8/0x220
SyS_write+0x6c/0x110
system_call+0x3c/0x130
Fixes: b5beae5e224f ("powerpc/pseries: Add driver for PAPR SCM regions")
Cc: <stable@vger.kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/macintosh')
0 files changed, 0 insertions, 0 deletions