From: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Date: Mon, 6 Mar 2023 12:51:50 +0000 (+0100)
Subject: fs/sysv: Don't round down address for kunmap_flush_on_unmap()
X-Git-Tag: v6.4-rc1~186^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8ad77c576721bd7f7b24bfd7fcb0a61bcfa1a1a2;p=thirdparty%2Fkernel%2Flinux.git

fs/sysv: Don't round down address for kunmap_flush_on_unmap()

The kernel virtual address passed to kunmap_flush_on_unmap() has no more
any need to be rounded down.

Therefore, delete the rounding down of "page_addr" when passed to
kunmap_local() in dir_put_page().

Don't backport without commit 88d7b12068b9 ("highmem: round down the
address passed to kunmap_flush_on_unmap()").

Cc: Ira Weiny <ira.weiny@intel.com>
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/sysv/dir.c b/fs/sysv/dir.c
index 999bceb999742..e2d26eb78af70 100644
--- a/fs/sysv/dir.c
+++ b/fs/sysv/dir.c
@@ -30,7 +30,7 @@ const struct file_operations sysv_dir_operations = {
 
 inline void dir_put_page(struct page *page, void *page_addr)
 {
-	kunmap_local((void *)((unsigned long)page_addr & PAGE_MASK));
+	kunmap_local(page_addr);
 	put_page(page);
 }