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authorArnd Bergmann <arnd@arndb.de>2018-07-13 16:27:44 +0200
committerDavid Howells <dhowells@redhat.com>2018-11-30 17:00:58 +0100
commit34e06fe4d05bd120556a95d5ebf1bcc97b0a1ca0 (patch)
tree46c49be455c1154616f49b177fc8063558e4f883 /fs/cachefiles
parentcachefiles: Explicitly cast enumerated type in put_object (diff)
downloadlinux-34e06fe4d05bd120556a95d5ebf1bcc97b0a1ca0.tar.xz
linux-34e06fe4d05bd120556a95d5ebf1bcc97b0a1ca0.zip
cachefiles: avoid deprecated get_seconds()
get_seconds() returns an unsigned long can overflow on some architectures and is deprecated because of that. In cachefs, we cast that number to a a 32-bit integer, which will overflow in year 2106 on all architectures. As confirmed by David Howells, the overflow probably isn't harmful in the end, since the timestamps are only used to make the file names unique, but they don't strictly have to be in monotonically increasing order since the files only exist in order to be deleted as quickly as possible. Moving to ktime_get_real_seconds() avoids the deprecated interface. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'fs/cachefiles')
-rw-r--r--fs/cachefiles/namei.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c
index 5ab411d4bc59..1645fcfd9691 100644
--- a/fs/cachefiles/namei.c
+++ b/fs/cachefiles/namei.c
@@ -338,7 +338,7 @@ static int cachefiles_bury_object(struct cachefiles_cache *cache,
try_again:
/* first step is to make up a grave dentry in the graveyard */
sprintf(nbuffer, "%08x%08x",
- (uint32_t) get_seconds(),
+ (uint32_t) ktime_get_real_seconds(),
(uint32_t) atomic_inc_return(&cache->gravecounter));
/* do the multiway lock magic */