summaryrefslogtreecommitdiff
path: root/fs/udf/file.c
diff options
context:
space:
mode:
authorFabian Frederick <fabf@skynet.be>2017-04-23 20:58:34 +0200
committerJan Kara <jack@suse.cz>2017-04-24 16:28:02 +0200
commit5c26eac43a0b708083ebd99e0ba57c9b268cef84 (patch)
treee9a0ed9341c465afd48bec233c3cad499a37b847 /fs/udf/file.c
parent6ff6b2b32924d53519948e270cb9f5549408c039 (diff)
udf: use kmap_atomic for memcpy copying
Use temporary mapping for memory copying operations. To avoid any sleeping problem, mark_inode_dirty(inode) was moved after kunmap() in udf_adinicb_readpage() down_write(&iinfo->i_data_sem) set before kmap_atomic() in udf_expand_file_adinicb() Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/udf/file.c')
-rw-r--r--fs/udf/file.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/fs/udf/file.c b/fs/udf/file.c
index e04cc0cdca9d..f5eb2d5b3bac 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -44,12 +44,12 @@ static void __udf_adinicb_readpage(struct page *page)
char *kaddr;
struct udf_inode_info *iinfo = UDF_I(inode);
- kaddr = kmap(page);
+ kaddr = kmap_atomic(page);
memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, inode->i_size);
memset(kaddr + inode->i_size, 0, PAGE_SIZE - inode->i_size);
flush_dcache_page(page);
SetPageUptodate(page);
- kunmap(page);
+ kunmap_atomic(kaddr);
}
static int udf_adinicb_readpage(struct file *file, struct page *page)
@@ -70,11 +70,11 @@ static int udf_adinicb_writepage(struct page *page,
BUG_ON(!PageLocked(page));
- kaddr = kmap(page);
+ kaddr = kmap_atomic(page);
memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr, inode->i_size);
- mark_inode_dirty(inode);
SetPageUptodate(page);
- kunmap(page);
+ kunmap_atomic(kaddr);
+ mark_inode_dirty(inode);
unlock_page(page);
return 0;