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authorNate Diller <nate.diller@gmail.com>2007-05-16 22:11:17 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-17 05:23:05 -0700
commitc9f2875b7968453a852e1de5d3504fd2241e8989 (patch)
tree0312f11b57164afd57bc0dfbd0e652ded1542cef
parent71ce92f3fa442069670a52fa6230a6064c4517b3 (diff)
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ecryptfs: use zero_user_page
Use zero_user_page() instead of open-coding it. Signed-off-by: Nate Diller <nate.diller@gmail.com> Cc: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/ecryptfs/mmap.c14
1 files changed, 3 insertions, 11 deletions
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 0770c4b66f5..88ea6697908 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -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 "