[PATCH] eCryptfs: add flush_dcache_page() calls
Call flush_dcache_page() after modifying a pagecache by hand.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 3014aa7..3a6f65c 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -238,7 +238,9 @@
lower_page_data = kmap_atomic(lower_page, KM_USER1);
memcpy(page_data, lower_page_data, PAGE_CACHE_SIZE);
kunmap_atomic(lower_page_data, KM_USER1);
+ flush_dcache_page(lower_page);
kunmap_atomic(page_data, KM_USER0);
+ flush_dcache_page(page);
rc = 0;
out:
if (likely(lower_page))
@@ -322,6 +324,7 @@
set_header_info(page_virt, crypt_stat);
}
kunmap_atomic(page_virt, KM_USER0);
+ flush_dcache_page(page);
if (rc) {
printk(KERN_ERR "Error reading xattr "
"region\n");
@@ -382,6 +385,7 @@
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);
out:
return 0;
}
@@ -456,6 +460,7 @@
header_virt = kmap_atomic(header_page, KM_USER0);
memcpy(header_virt, &file_size, sizeof(u64));
kunmap_atomic(header_virt, KM_USER0);
+ flush_dcache_page(header_page);
rc = lower_a_ops->commit_write(lower_file, header_page, 0, 8);
if (rc < 0)
ecryptfs_printk(KERN_ERR, "Error commiting header page "
@@ -742,6 +747,7 @@
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);
rc = ecryptfs_commit_write(file, tmp_page, start, start + num_zeros);
if (rc < 0) {
ecryptfs_printk(KERN_ERR, "Error attempting to write zero's "