Commit c9f2875b authored by Nate Diller's avatar Nate Diller Committed by Linus Torvalds
Browse files

ecryptfs: use zero_user_page



Use zero_user_page() instead of open-coding it.
Signed-off-by: default avatarNate Diller <nate.diller@gmail.com>
Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 71ce92f3
......@@ -364,18 +364,14 @@ static int fill_zeros_to_end_of_page(struct page *page, unsigned int to)
{
struct inode *inode = page->mapping->host;
int end_byte_in_page;
char *page_virt;
if ((i_size_read(inode) / PAGE_CACHE_SIZE) != page->index)
goto out;
end_byte_in_page = i_size_read(inode) % PAGE_CACHE_SIZE;
if (to > end_byte_in_page)
end_byte_in_page = to;
page_virt = kmap_atomic(page, KM_USER0);
memset((page_virt + end_byte_in_page), 0,
(PAGE_CACHE_SIZE - end_byte_in_page));
kunmap_atomic(page_virt, KM_USER0);
flush_dcache_page(page);
zero_user_page(page, end_byte_in_page,
PAGE_CACHE_SIZE - end_byte_in_page, KM_USER0);
out:
return 0;
}
......@@ -740,7 +736,6 @@ int write_zeros(struct file *file, pgoff_t index, int start, int num_zeros)
{
int rc = 0;
struct page *tmp_page;
char *tmp_page_virt;
tmp_page = ecryptfs_get1page(file, index);
if (IS_ERR(tmp_page)) {
......@@ -757,10 +752,7 @@ int write_zeros(struct file *file, pgoff_t index, int start, int num_zeros)
page_cache_release(tmp_page);
goto out;
}
tmp_page_virt = kmap_atomic(tmp_page, KM_USER0);
memset(((char *)tmp_page_virt + start), 0, num_zeros);
kunmap_atomic(tmp_page_virt, KM_USER0);
flush_dcache_page(tmp_page);
zero_user_page(tmp_page, start, num_zeros, KM_USER0);
rc = ecryptfs_commit_write(file, tmp_page, start, start + num_zeros);
if (rc < 0) {
ecryptfs_printk(KERN_ERR, "Error attempting to write zero's "
......
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