linux-kernel - [PATCH v2 02/24] fat: use prandom_u32() for i

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Message-Id: <20191213204936.3643476-3-arnd@arndb.de>
Date:   Fri, 13 Dec 2019 21:49:11 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     y2038@...ts.linaro.org, linux-kernel@...r.kernel.org,
        OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Carmeli Tamir <carmeli.tamir@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Thomas Gleixner <tglx@...utronix.de>,
        Deepa Dinamani <deepa.kernel@...il.com>
Subject: [PATCH v2 02/24] fat: use prandom_u32() for i_generation

Similar to commit 46c9a946d766 ("shmem: use monotonic time for i_generation")
we should not use the deprecated get_seconds() interface for i_generation.

prandom_u32() is the replacement used in other file systems.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 fs/fat/inode.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 5f04c5c810fb..594b05ae16c9 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -21,6 +21,7 @@
 #include <linux/blkdev.h>
 #include <linux/backing-dev.h>
 #include <asm/unaligned.h>
+#include <linux/random.h>
 #include <linux/iversion.h>
 #include "fat.h"
 
@@ -521,7 +522,7 @@ int fat_fill_inode(struct inode *inode, struct msdos_dir_entry *de)
 	inode->i_uid = sbi->options.fs_uid;
 	inode->i_gid = sbi->options.fs_gid;
 	inode_inc_iversion(inode);
-	inode->i_generation = get_seconds();
+	inode->i_generation = prandom_u32();
 
 	if ((de->attr & ATTR_DIR) && !IS_FREE(de->name)) {
 		inode->i_generation &= ~1;
-- 
2.20.0