[PATCH] fs: fix-up schedule_timeout() usage

Use schedule_timeout_{,un}interruptible() instead of
set_current_state()/schedule_timeout() to reduce kernel size.  Also use helper
functions to convert between human time units and jiffies rather than constant
HZ division to avoid rounding errors.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

10 files changed, 21 insertions, 33 deletions

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 3217ac5f6bd7..2335f14a1583 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3215,10 +3215,8 @@ cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
         }
         
         cifs_sb->tcon = NULL;
-        if (ses) {
-                set_current_state(TASK_INTERRUPTIBLE);
-                schedule_timeout(HZ / 2);
-        }
+        if (ses)
+                schedule_timeout_interruptible(msecs_to_jiffies(500));
         if (ses)
                 sesInfoFree(ses);
 
diff --git a/fs/jbd/transaction.c b/fs/jbd/transaction.c
index c6ec66fd8766..49bbc2be3d72 100644
--- a/fs/jbd/transaction.c
+++ b/fs/jbd/transaction.c
@@ -1340,8 +1340,7 @@ int journal_stop(handle_t *handle)
         if (handle->h_sync) {
                 do {
                         old_handle_count = transaction->t_handle_count;
-                        set_current_state(TASK_UNINTERRUPTIBLE);
-                        schedule_timeout(1);
+                        schedule_timeout_uninterruptible(1);
                 } while (old_handle_count != transaction->t_handle_count);
         }
 
diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
index 14b3ce87fa29..87332f30141b 100644
--- a/fs/lockd/clntproc.c
+++ b/fs/lockd/clntproc.c
@@ -299,8 +299,7 @@ nlmclnt_alloc_call(void)
                         return call;
                 }
                 printk("nlmclnt_alloc_call: failed, waiting for memory\n");
-                current->state = TASK_INTERRUPTIBLE;
-                schedule_timeout(5*HZ);
+                schedule_timeout_interruptible(5*HZ);
         }
         return NULL;
 }
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 2681485cf2d0..edc95514046d 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -34,8 +34,7 @@ nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
                 res = rpc_call_sync(clnt, msg, flags);
                 if (res != -EJUKEBOX)
                         break;
-                set_current_state(TASK_INTERRUPTIBLE);
-                schedule_timeout(NFS_JUKEBOX_RETRY_TIME);
+                schedule_timeout_interruptible(NFS_JUKEBOX_RETRY_TIME);
                 res = -ERESTARTSYS;
         } while (!signalled());
         rpc_clnt_sigunmask(clnt, &oldset);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 0c5a308e4963..9701ca8c9428 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2418,14 +2418,11 @@ static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
                 *timeout = NFS4_POLL_RETRY_MAX;
         rpc_clnt_sigmask(clnt, &oldset);
         if (clnt->cl_intr) {
-                set_current_state(TASK_INTERRUPTIBLE);
-                schedule_timeout(*timeout);
+                schedule_timeout_interruptible(*timeout);
                 if (signalled())
                         res = -ERESTARTSYS;
-        } else {
-                set_current_state(TASK_UNINTERRUPTIBLE);
-                schedule_timeout(*timeout);
-        }
+        } else
+                schedule_timeout_uninterruptible(*timeout);
         rpc_clnt_sigunmask(clnt, &oldset);
         *timeout <<= 1;
         return res;
@@ -2578,8 +2575,7 @@ int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4
 static unsigned long
 nfs4_set_lock_task_retry(unsigned long timeout)
 {
-        current->state = TASK_INTERRUPTIBLE;
-        schedule_timeout(timeout);
+        schedule_timeout_interruptible(timeout);
         timeout <<= 1;
         if (timeout > NFS4_LOCK_MAXTIMEOUT)
                 return NFS4_LOCK_MAXTIMEOUT;
diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index a8e29e9bbbd0..4b15761434bc 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -2868,8 +2868,7 @@ static void let_transaction_grow(struct super_block *sb, unsigned long trans_id)
         struct reiserfs_journal *journal = SB_JOURNAL(sb);
         unsigned long bcount = journal->j_bcount;
         while (1) {
-                set_current_state(TASK_UNINTERRUPTIBLE);
-                schedule_timeout(1);
+                schedule_timeout_uninterruptible(1);
                 journal->j_current_jl->j_state |= LIST_COMMIT_PENDING;
                 while ((atomic_read(&journal->j_wcount) > 0 ||
                         atomic_read(&journal->j_jlock)) &&
diff --git a/fs/smbfs/proc.c b/fs/smbfs/proc.c
index 220babe91efd..38ab558835c4 100644
--- a/fs/smbfs/proc.c
+++ b/fs/smbfs/proc.c
@@ -2397,8 +2397,7 @@ smb_proc_readdir_long(struct file *filp, void *dirent, filldir_t filldir,
                 if (req->rq_rcls == ERRSRV && req->rq_err == ERRerror) {
                         /* a damn Win95 bug - sometimes it clags if you 
                            ask it too fast */
-                        current->state = TASK_INTERRUPTIBLE;
-                        schedule_timeout(HZ/5);
+                        schedule_timeout_interruptible(msecs_to_jiffies(200));
                         continue;
                 }
 
diff --git a/fs/xfs/linux-2.6/time.h b/fs/xfs/linux-2.6/time.h
index 6c6fd0faa8e1..b0d2873ab274 100644
--- a/fs/xfs/linux-2.6/time.h
+++ b/fs/xfs/linux-2.6/time.h
@@ -39,8 +39,7 @@ typedef struct timespec timespec_t;
 
 static inline void delay(long ticks)
 {
-        set_current_state(TASK_UNINTERRUPTIBLE);
-        schedule_timeout(ticks);
+        schedule_timeout_uninterruptible(ticks);
 }
 
 static inline void nanotime(struct timespec *tvp)
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index 655bf4a78afe..e82cf72ac599 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -1780,10 +1780,10 @@ xfsbufd(
                         xfsbufd_force_sleep = 0;
                 }
 
-                set_current_state(TASK_INTERRUPTIBLE);
-                schedule_timeout((xfs_buf_timer_centisecs * HZ) / 100);
+                schedule_timeout_interruptible
+                        (xfs_buf_timer_centisecs * msecs_to_jiffies(10));
 
-                age = (xfs_buf_age_centisecs * HZ) / 100;
+                age = xfs_buf_age_centisecs * msecs_to_jiffies(10);
                 spin_lock(&pbd_delwrite_lock);
                 list_for_each_entry_safe(pb, n, &pbd_delwrite_queue, pb_list) {
                         PB_TRACE(pb, "walkq1", (long)pagebuf_ispin(pb));
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 0da87bfc9999..2302454d8d47 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -467,7 +467,7 @@ xfs_flush_inode(
 
         igrab(inode);
         xfs_syncd_queue_work(vfs, inode, xfs_flush_inode_work);
-        delay(HZ/2);
+        delay(msecs_to_jiffies(500));
 }
 
 /*
@@ -492,7 +492,7 @@ xfs_flush_device(
 
         igrab(inode);
         xfs_syncd_queue_work(vfs, inode, xfs_flush_device_work);
-        delay(HZ/2);
+        delay(msecs_to_jiffies(500));
         xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC);
 }
 
@@ -520,10 +520,9 @@ xfssyncd(
         struct vfs_sync_work    *work, *n;
         LIST_HEAD               (tmp);
 
-        timeleft = (xfs_syncd_centisecs * HZ) / 100;
+        timeleft = xfs_syncd_centisecs * msecs_to_jiffies(10);
         for (;;) {
-                set_current_state(TASK_INTERRUPTIBLE);
-                timeleft = schedule_timeout(timeleft);
+                timeleft = schedule_timeout_interruptible(timeleft);
                 /* swsusp */
                 try_to_freeze();
                 if (kthread_should_stop())
@@ -537,7 +536,8 @@ xfssyncd(
                  */
                 if (!timeleft || list_empty(&vfsp->vfs_sync_list)) {
                         if (!timeleft)
-                                timeleft = (xfs_syncd_centisecs * HZ) / 100;
+                                timeleft = xfs_syncd_centisecs *
+                                                        msecs_to_jiffies(10);
                         INIT_LIST_HEAD(&vfsp->vfs_sync_work.w_list);
                         list_add_tail(&vfsp->vfs_sync_work.w_list,
                                         &vfsp->vfs_sync_list);