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autofs: fix inconsistent use of now variable

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The global variable "now" in fs/autofs/expire.c is used in an inconsistent
way, sometimes using jiffies directly, and sometimes using the "now"
variable, and setting it isn't done consistently either.

But the autofs dentry info last_used field is only updated during path
walks or during expire so jiffies can be used directly and the global
variable "now" removed.

Link: http://lkml.kernel.org/r/152937731702.21213.7371321165189170865.stgit@pluto.themaw.net
Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ian Kent 2018-08-21 21:58:44 -07:00 committed by Linus Torvalds
parent d4d79b8195
commit 2fd9944f0f
1 changed files with 3 additions and 7 deletions
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10
fs/autofs/expire.c
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@ -10,8 +10,6 @@
#include "autofs_i.h" #include "autofs_i.h"
static unsigned long now;
/* Check if a dentry can be expired */ /* Check if a dentry can be expired */
static inline int autofs_can_expire(struct dentry *dentry, static inline int autofs_can_expire(struct dentry *dentry,
unsigned long timeout, int do_now) unsigned long timeout, int do_now)
@ -24,7 +22,7 @@ static inline int autofs_can_expire(struct dentry *dentry,
if (!do_now) { if (!do_now) {
/* Too young to die */ /* Too young to die */
if (!timeout || time_after(ino->last_used + timeout, now)) if (!timeout || time_after(ino->last_used + timeout, jiffies))
return 0; return 0;
} }
return 1; return 1;
@ -307,7 +305,6 @@ struct dentry *autofs_expire_direct(struct super_block *sb,
if (!root) if (!root)
return NULL; return NULL;
now = jiffies;
timeout = sbi->exp_timeout; timeout = sbi->exp_timeout;
if (!autofs_direct_busy(mnt, root, timeout, do_now)) { if (!autofs_direct_busy(mnt, root, timeout, do_now)) {
@ -442,7 +439,6 @@ struct dentry *autofs_expire_indirect(struct super_block *sb,
if (!root) if (!root)
return NULL; return NULL;
now = jiffies;
timeout = sbi->exp_timeout; timeout = sbi->exp_timeout;
dentry = NULL; dentry = NULL;
@ -575,7 +571,7 @@ int autofs_expire_run(struct super_block *sb,
spin_lock(&sbi->fs_lock); spin_lock(&sbi->fs_lock);
ino = autofs_dentry_ino(dentry); ino = autofs_dentry_ino(dentry);
/* avoid rapid-fire expire attempts if expiry fails */ /* avoid rapid-fire expire attempts if expiry fails */
ino->last_used = now; ino->last_used = jiffies;
ino->flags &= ~(AUTOFS_INF_EXPIRING|AUTOFS_INF_WANT_EXPIRE); ino->flags &= ~(AUTOFS_INF_EXPIRING|AUTOFS_INF_WANT_EXPIRE);
complete_all(&ino->expire_complete); complete_all(&ino->expire_complete);
spin_unlock(&sbi->fs_lock); spin_unlock(&sbi->fs_lock);
@ -605,7 +601,7 @@ int autofs_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
spin_lock(&sbi->fs_lock); spin_lock(&sbi->fs_lock);
/* avoid rapid-fire expire attempts if expiry fails */ /* avoid rapid-fire expire attempts if expiry fails */
ino->last_used = now; ino->last_used = jiffies;
ino->flags &= ~(AUTOFS_INF_EXPIRING|AUTOFS_INF_WANT_EXPIRE); ino->flags &= ~(AUTOFS_INF_EXPIRING|AUTOFS_INF_WANT_EXPIRE);
complete_all(&ino->expire_complete); complete_all(&ino->expire_complete);
spin_unlock(&sbi->fs_lock); spin_unlock(&sbi->fs_lock);