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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-09-25 21:37:41 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-09-25 21:37:41 +0200
commita38523185b40fd85d2afe5b5fbfb0952f7153e96 (patch)
tree0e93b1fae6f449647cad5b9011442bf33cdc3c5b /fs
parent846e8dd47c264e0b359afed28ea88e0acdee6818 (diff)
parent41c9b1be335b5afc3b5fb71c5d16f9d5939cd13f (diff)
downloadlinux-a38523185b40fd85d2afe5b5fbfb0952f7153e96.tar.bz2
erge tag 'libnvdimm-fixes-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Dan writes: "libnvdimm/dax for 4.19-rc6 * (2) fixes for the dax error handling updates that were merged for v4.19-rc1. My mails to Al have been bouncing recently, so I do not have his ack but the uaccess change is of the trivial / obviously correct variety. The address_space_operations fixes a regression. * A filesystem-dax fix to correct the zero page lookup to be compatible with non-x86 (mips and s390) architectures." * tag 'libnvdimm-fixes-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: device-dax: Add missing address_space_operations uaccess: Fix is_source param for check_copy_size() in copy_to_iter_mcsafe() filesystem-dax: Fix use of zero page
Diffstat (limited to 'fs')
-rw-r--r--fs/dax.c13
1 files changed, 2 insertions, 11 deletions
diff --git a/fs/dax.c b/fs/dax.c
index f32d7125ad0f..b68ce484e1be 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1120,21 +1120,12 @@ static vm_fault_t dax_load_hole(struct address_space *mapping, void *entry,
{
struct inode *inode = mapping->host;
unsigned long vaddr = vmf->address;
- vm_fault_t ret = VM_FAULT_NOPAGE;
- struct page *zero_page;
- pfn_t pfn;
-
- zero_page = ZERO_PAGE(0);
- if (unlikely(!zero_page)) {
- ret = VM_FAULT_OOM;
- goto out;
- }
+ pfn_t pfn = pfn_to_pfn_t(my_zero_pfn(vaddr));
+ vm_fault_t ret;
- pfn = page_to_pfn_t(zero_page);
dax_insert_mapping_entry(mapping, vmf, entry, pfn, RADIX_DAX_ZERO_PAGE,
false);
ret = vmf_insert_mixed(vmf->vma, vaddr, pfn);
-out:
trace_dax_load_hole(inode, vmf, ret);
return ret;
}