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udf: Convert udf_expand_file_adinicb() to avoid kmap_atomic()

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Remove the last two remaining kmap_atomic() uses in UDF in
udf_expand_file_adinicb(). The first use can be actually conveniently
replaced with udf_adinicb_readpage(), the second with memcpy_to_page().

Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2023-01-25 10:33:37 +01:00
parent 5cfc45321a
commit 1eeceaec79
1 changed files with 4 additions and 14 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

18
fs/udf/inode.c
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@ -336,7 +336,6 @@ const struct address_space_operations udf_aops = {
int udf_expand_file_adinicb(struct inode *inode)
{
struct page *page;
char *kaddr;
struct udf_inode_info *iinfo = UDF_I(inode);
int err;
@ -358,16 +357,8 @@ int udf_expand_file_adinicb(struct inode *inode)
if (!page)
return -ENOMEM;
if (!PageUptodate(page)) {
kaddr = kmap_atomic(page);
memset(kaddr + iinfo->i_lenAlloc, 0x00,
PAGE_SIZE - iinfo->i_lenAlloc);
memcpy(kaddr, iinfo->i_data + iinfo->i_lenEAttr,
iinfo->i_lenAlloc);
flush_dcache_page(page);
SetPageUptodate(page);
kunmap_atomic(kaddr);
}
if (!PageUptodate(page))
udf_adinicb_readpage(page);
down_write(&iinfo->i_data_sem);
memset(iinfo->i_data + iinfo->i_lenEAttr, 0x00,
iinfo->i_lenAlloc);
@ -384,9 +375,8 @@ int udf_expand_file_adinicb(struct inode *inode)
/* Restore everything back so that we don't lose data... */
lock_page(page);
down_write(&iinfo->i_data_sem);
kaddr = kmap_atomic(page);
memcpy(iinfo->i_data + iinfo->i_lenEAttr, kaddr, inode->i_size);
kunmap_atomic(kaddr);
memcpy_to_page(page, 0, iinfo->i_data + iinfo->i_lenEAttr,
inode->i_size);
unlock_page(page);
iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
iinfo->i_lenAlloc = inode->i_size;