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| author | Fabian Frederick <fabf@skynet.be> | 2017-04-23 20:58:34 +0200 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2017-04-24 16:28:02 +0200 |
| commit | 5c26eac43a0b708083ebd99e0ba57c9b268cef84 (patch) | |
| tree | e9a0ed9341c465afd48bec233c3cad499a37b847 /fs/udf/file.c | |
| parent | 6ff6b2b32924d53519948e270cb9f5549408c039 (diff) | |
| download | blackbird-op-linux-5c26eac43a0b708083ebd99e0ba57c9b268cef84.tar.gz blackbird-op-linux-5c26eac43a0b708083ebd99e0ba57c9b268cef84.zip | |
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.c | 10 |
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; |
