From: Richard Weinberger <richard@nod.at>
Date: Wed, 4 Mar 2015 19:58:39 +0000 (+0100)
Subject: hostfs: Use page_offset()
X-Git-Tag: v4.14-rc1~5585^2~12
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=af6aa1b9cad7350d675fe3523ab062e0e4c829cb;p=platform%2Fkernel%2Flinux-rpi.git

hostfs: Use page_offset()

The kernel offers a helper function for that, use it.

Signed-off-by: Richard Weinberger <richard@nod.at>
---

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index f154747..f82f98a5 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -410,7 +410,7 @@ static int hostfs_writepage(struct page *page, struct writeback_control *wbc)
 	struct address_space *mapping = page->mapping;
 	struct inode *inode = mapping->host;
 	char *buffer;
-	unsigned long long base;
+	loff_t base = page_offset(page);
 	int count = PAGE_CACHE_SIZE;
 	int end_index = inode->i_size >> PAGE_CACHE_SHIFT;
 	int err;
@@ -419,7 +419,6 @@ static int hostfs_writepage(struct page *page, struct writeback_control *wbc)
 		count = inode->i_size & (PAGE_CACHE_SIZE-1);
 
 	buffer = kmap(page);
-	base = ((unsigned long long) page->index) << PAGE_CACHE_SHIFT;
 
 	err = write_file(HOSTFS_I(inode)->fd, &base, buffer, count);
 	if (err != count) {
@@ -444,10 +443,9 @@ static int hostfs_writepage(struct page *page, struct writeback_control *wbc)
 static int hostfs_readpage(struct file *file, struct page *page)
 {
 	char *buffer;
-	long long start;
+	loff_t start = page_offset(page);
 	int bytes_read, ret = 0;
 
-	start = (long long) page->index << PAGE_CACHE_SHIFT;
 	buffer = kmap(page);
 	bytes_read = read_file(FILE_HOSTFS_I(file)->fd, &start, buffer,
 			PAGE_CACHE_SIZE);